<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Labels Linkbase, based on XBRL 2.1  http://www.rrdonnelley.com/ -->
<!-- Version: 6.23.6 -->
<!-- Round: 5 -->
<!-- Creation date: 2016-10-19T14:23:14Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley &amp; Sons Company All Rights Reserved. -->
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xml:lang="en-US" id="id_8501307_1341977_1_1">Accounts Receivable, Net, Current</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingencies" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xml:lang="en-US" id="id_8501307_1337520_1_1">Accrual for Environmental Loss Contingencies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xml:lang="en-US" id="id_8501307_1337520_4_1">Total Balance at End of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xml:lang="en-US" id="id_8501307_1337520_5_1">Total Balance at Beginning of period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xml:lang="en-US" id="id_8501307_1337520_6_1">Total Balance at End of period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccrualForEnvironmentalLossContingencies" xlink:to="us-gaap_AccrualForEnvironmentalLossContingencies_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses" xlink:label="us-gaap_AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses_lbl" xml:lang="en-US" id="id_8501307_1342964_1_1">Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses_lbl" xml:lang="en-US" id="id_8501307_1342964_2_1">Additions</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingenciesPayments1" xlink:label="us-gaap_AccrualForEnvironmentalLossContingenciesPayments1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccrualForEnvironmentalLossContingenciesPayments1_lbl" xml:lang="en-US" id="id_8501307_1339199_1_1">Accrual for Environmental Loss Contingencies, Payments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccrualForEnvironmentalLossContingenciesPayments1_lbl" xml:lang="en-US" id="id_8501307_1339199_2_1">Less: Payments / Reductions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccrualForEnvironmentalLossContingenciesPayments1" xlink:to="us-gaap_AccrualForEnvironmentalLossContingenciesPayments1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedEnvironmentalLossContingenciesCurrent" xlink:label="us-gaap_AccruedEnvironmentalLossContingenciesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedEnvironmentalLossContingenciesCurrent_lbl" xml:lang="en-US" id="id_8501307_1340097_1_1">Accrued Environmental Loss Contingencies, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccruedEnvironmentalLossContingenciesCurrent_lbl" xml:lang="en-US" id="id_8501307_1340097_2_1">Environmental Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AccruedEnvironmentalLossContingenciesCurrent_lbl" xml:lang="en-US" id="id_8501307_1340097_12_1">Less: Current Portion</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedEnvironmentalLossContingenciesCurrent" xlink:to="us-gaap_AccruedEnvironmentalLossContingenciesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent" xlink:label="us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1340098_1_1">Accrued Environmental Loss Contingencies, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1340098_2_1">Environmental Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1340098_12_1">Noncurrent Balance</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_AdjustmentForRateIncrease" xlink:label="utl_AdjustmentForRateIncrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_AdjustmentForRateIncrease_lbl" xml:lang="en-US" id="id_8501307_1481197_3_1">Adjustment for rate Increase.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_AdjustmentForRateIncrease_lbl" xml:lang="en-US" id="id_8501307_1481197_1_1">Adjustment for rate Increase</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US" id="id_8501307_1333553_1_1">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="us-gaap_AllOtherSegmentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllOtherSegmentsMember_lbl" xml:lang="en-US" id="id_8501307_1330416_1_1">Other Segments [Member]</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_AllowanceForDoubtfulAccountsPolicyTextBlock" xlink:label="utl_AllowanceForDoubtfulAccountsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_AllowanceForDoubtfulAccountsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1363963_3_1">Allowance For Doubtful Accounts, Policy.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_AllowanceForDoubtfulAccountsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1363963_1_1">Allowance For Doubtful Accounts [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_AllowanceForDoubtfulAccountsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1363963_2_1">Allowance for Doubtful Accounts</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xml:lang="en-US" id="id_8501307_1340076_1_1">Allowance for Doubtful Accounts Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xml:lang="en-US" id="id_8501307_1340076_2_1">Allowance for Doubtful Accounts</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_AllowanceForDoubtfulAccountsTableTextBlock" xlink:label="utl_AllowanceForDoubtfulAccountsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_AllowanceForDoubtfulAccountsTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1403695_3_1">Allowance for Doubtful Accounts, Table.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_AllowanceForDoubtfulAccountsTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1403695_2_1">Allowance for Doubtful Accounts Included in Accounts Receivable Net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_AllowanceForDoubtfulAccountsTableTextBlock" xlink:to="utl_AllowanceForDoubtfulAccountsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_AmendmentApprovedDate" xlink:label="utl_AmendmentApprovedDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_AmendmentApprovedDate_lbl" xml:lang="en-US" id="id_8501307_1380371_3_1">Amendment Approved Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_AmendmentApprovedDate_lbl" xml:lang="en-US" id="id_8501307_1380371_1_1">Amendment Approved Date</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_AmendmentEffectiveDate_lbl" xml:lang="en-US" id="id_8501307_1346766_3_1">Effective date of rates resulting from rate case.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_AmendmentEffectiveDate_lbl" xml:lang="en-US" id="id_8501307_1346766_1_1">Amendment Effective Date</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US" id="id_8501307_1327225_1_1">Amendment Flag</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US" id="id_8501307_1327225_2_1">Amendment Flag</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetRecoveryDamagedPropertyCostsNoncurrent" xlink:label="us-gaap_AssetRecoveryDamagedPropertyCostsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRecoveryDamagedPropertyCostsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1341069_1_1">Asset Recovery Damaged Property Costs, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRecoveryDamagedPropertyCostsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1341069_2_1">Recovery amount</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent" xlink:label="us-gaap_AssetRetirementObligationsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1340065_1_1">Asset Retirement Obligations, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRetirementObligationsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1340065_2_1">Cost of Removal Obligations</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_8501307_1342997_2_1">Segment Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US" id="id_8501307_1342997_6_1">TOTAL ASSETS</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US" id="id_8501307_1324158_1_1">Assets [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US" id="id_8501307_1324158_2_1">ASSETS:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US" id="id_8501307_1340155_1_1">Assets, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US" id="id_8501307_1340155_6_1">Total Current Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US" id="id_8501307_1333606_1_1">Assets, Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US" id="id_8501307_1333606_2_1">Current Assets:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="us-gaap_AssetsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1342034_1_1">Assets, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1342034_6_1">Total Other Noncurrent Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrent" xlink:to="us-gaap_AssetsNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsNoncurrentAbstract" xlink:label="us-gaap_AssetsNoncurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNoncurrentAbstract_lbl" xml:lang="en-US" id="id_8501307_1324164_1_1">Assets, Noncurrent [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsNoncurrentAbstract_lbl" xml:lang="en-US" id="id_8501307_1324164_2_1">Other Noncurrent Assets:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_AssetsNoncurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AwardTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1324199_1_1">Award Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AwardTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1324199_2_1">Award Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="us-gaap_BalanceSheetLocationAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xml:lang="en-US" id="id_8501307_1327299_1_1">Balance Sheet Location [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xml:lang="en-US" id="id_8501307_1327299_2_1">Balance Sheet Location</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xml:lang="en-US" id="id_8501307_1324206_1_1">Balance Sheet Location [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xml:lang="en-US" id="id_8501307_1324206_2_1">Balance Sheet Location [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_BalanceSheetLocationDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1333652_1_1">Basis of Accounting, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1333652_2_1">Basis of Presentation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:to="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_BenefitPlanCostsMember" xlink:label="utl_BenefitPlanCostsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_BenefitPlanCostsMember_lbl" xml:lang="en-US" id="id_8501307_1442726_3_1">Benefit Plan Costs [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_BenefitPlanCostsMember_lbl" xml:lang="en-US" id="id_8501307_1442726_1_1">Benefit Plan Costs [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_BenefitPlanCostsMember_lbl" xml:lang="en-US" id="id_8501307_1442726_2_1">Benefit Plan Costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_BenefitPlanCostsMember" xlink:to="utl_BenefitPlanCostsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl" xml:lang="en-US" id="id_8501307_1340030_1_1">Capital Expenditures Incurred but Not yet Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl" xml:lang="en-US" id="id_8501307_1340030_2_1">Capital Expenditures Included in Accounts Payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:to="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalizationLongtermDebtAndEquity" xlink:label="us-gaap_CapitalizationLongtermDebtAndEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalizationLongtermDebtAndEquity_lbl" xml:lang="en-US" id="id_8501307_1337436_1_1">Capitalization, Long-term Debt and Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CapitalizationLongtermDebtAndEquity_lbl" xml:lang="en-US" id="id_8501307_1337436_6_1">Total Capitalization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalizationLongtermDebtAndEquity" xlink:to="us-gaap_CapitalizationLongtermDebtAndEquity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalizationLongtermDebtAndEquityAbstract" xlink:label="us-gaap_CapitalizationLongtermDebtAndEquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalizationLongtermDebtAndEquityAbstract_lbl" xml:lang="en-US" id="id_8501307_1324295_1_1">Capitalization, Long-term Debt and Equity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalizationLongtermDebtAndEquityAbstract_lbl" xml:lang="en-US" id="id_8501307_1324295_2_1">Capitalization:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalizationLongtermDebtAndEquityAbstract" xlink:to="us-gaap_CapitalizationLongtermDebtAndEquityAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalLeaseObligations" xlink:label="us-gaap_CapitalLeaseObligations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeaseObligations_lbl" xml:lang="en-US" id="id_8501307_1339136_1_1">Capital Lease Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalLeaseObligations_lbl" xml:lang="en-US" id="id_8501307_1339136_2_1">Capital lease obligation, total capitalized cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligations" xlink:to="us-gaap_CapitalLeaseObligations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalLeaseObligationsCurrent" xlink:label="us-gaap_CapitalLeaseObligationsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeaseObligationsCurrent_lbl" xml:lang="en-US" id="id_8501307_1339137_1_1">Capital Lease Obligations, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalLeaseObligationsCurrent_lbl" xml:lang="en-US" id="id_8501307_1339137_2_1">Capital lease obligation, current fact already tagged</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CapitalLeaseObligationsCurrent_lbl" xml:lang="en-US" id="id_8501307_1339137_12_1">Capital Lease Obligations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsCurrent" xlink:to="us-gaap_CapitalLeaseObligationsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalLeaseObligationsIncurred" xlink:label="us-gaap_CapitalLeaseObligationsIncurred"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeaseObligationsIncurred_lbl" xml:lang="en-US" id="id_8501307_1337435_1_1">Capital Lease Obligations Incurred</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalLeaseObligationsIncurred_lbl" xml:lang="en-US" id="id_8501307_1337435_2_1">Payments on Capital Leases</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsIncurred" xlink:to="us-gaap_CapitalLeaseObligationsIncurred_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent" xlink:label="us-gaap_CapitalLeaseObligationsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeaseObligationsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1339138_1_1">Capital Lease Obligations, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalLeaseObligationsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1339138_2_1">Capital lease obligation, noncurrent fact already tagged</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CapitalLeaseObligationsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1339138_12_1">Capital Lease Obligations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsNoncurrent" xlink:to="us-gaap_CapitalLeaseObligationsNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_CapitalLeasesTerminationDate" xlink:label="utl_CapitalLeasesTerminationDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_CapitalLeasesTerminationDate_lbl" xml:lang="en-US" id="id_8501307_1497013_3_1">Capital Leases Termination Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_CapitalLeasesTerminationDate_lbl" xml:lang="en-US" id="id_8501307_1497013_1_1">Capital Leases Termination Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_CapitalLeasesTerminationDate_lbl" xml:lang="en-US" id="id_8501307_1497013_2_1">Capital lease obligation, maturity period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_CapitalLeasesTerminationDate" xlink:to="utl_CapitalLeasesTerminationDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_8501307_1341134_1_1">Cash and Cash Equivalents, at Carrying Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_8501307_1341134_4_1">Cash and Cash Equivalents at End of Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_8501307_1341134_5_1">Cash and Cash Equivalents at Beginning of Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US" id="id_8501307_1341134_2_1">Cash and Cash Equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_8501307_1343060_1_1">Cash and Cash Equivalents, Period Increase (Decrease)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US" id="id_8501307_1343060_6_1">Net (Decrease) Increase in Cash and Cash Equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1324323_1_1">Cash and Cash Equivalents, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1324323_2_1">Cash and Cash Equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_CashDeposits_lbl" xml:lang="en-US" id="id_8501307_1474837_3_1">Cash Deposits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_CashDeposits_lbl" xml:lang="en-US" id="id_8501307_1474837_1_1">Cash Deposits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_CashDeposits_lbl" xml:lang="en-US" id="id_8501307_1474837_2_1">Cash Deposits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_CashDeposits" xlink:to="utl_CashDeposits_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_CashEquivalentsMaturityPeriod" xlink:label="utl_CashEquivalentsMaturityPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_CashEquivalentsMaturityPeriod_lbl" xml:lang="en-US" id="id_8501307_1452620_3_1">Cash Equivalents, Maturity Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_CashEquivalentsMaturityPeriod_lbl" xml:lang="en-US" id="id_8501307_1452620_1_1">Cash Equivalents, Maturity Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_CashEquivalentsMaturityPeriod_lbl" xml:lang="en-US" id="id_8501307_1452620_2_1">Cash equivalents maturity period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_CashEquivalentsMaturityPeriod" xlink:to="utl_CashEquivalentsMaturityPeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ChangeInDeferredRegulatoryAndOtherCharges" xlink:label="utl_ChangeInDeferredRegulatoryAndOtherCharges"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ChangeInDeferredRegulatoryAndOtherCharges_lbl" xml:lang="en-US" id="id_8501307_1481096_3_1">The net change during the reporting period in deferred regulatory and other charges.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ChangeInDeferredRegulatoryAndOtherCharges_lbl" xml:lang="en-US" id="id_8501307_1481096_1_1">Change In Deferred Regulatory And Other Charges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ChangeInDeferredRegulatoryAndOtherCharges_lbl" xml:lang="en-US" id="id_8501307_1481096_2_1">Deferred Regulatory and Other Charges</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ChangeInDeferredRegulatoryAndOtherCharges" xlink:to="utl_ChangeInDeferredRegulatoryAndOtherCharges_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ChangeInNetIncomeLossDueToChangeInEstimates" xlink:label="utl_ChangeInNetIncomeLossDueToChangeInEstimates"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ChangeInNetIncomeLossDueToChangeInEstimates_lbl" xml:lang="en-US" id="id_8501307_1429900_3_1">Disclosure that no losses are anticipated exceeding those amounts recorded.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ChangeInNetIncomeLossDueToChangeInEstimates_lbl" xml:lang="en-US" id="id_8501307_1429900_1_1">Change in Net Income (Loss) due to Change in Estimates</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ChangeInNetIncomeLossDueToChangeInEstimates_lbl" xml:lang="en-US" id="id_8501307_1429900_2_1">Income (loss) incurred in excess of recorded amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ChangeInNetIncomeLossDueToChangeInEstimates" xlink:to="utl_ChangeInNetIncomeLossDueToChangeInEstimates_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xml:lang="en-US" id="id_8501307_1330668_1_1">Class of Stock [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xml:lang="en-US" id="id_8501307_1330668_2_1">Class of Stock [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfStockLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US" id="id_8501307_1339112_1_1">Commitments and Contingencies</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US" id="id_8501307_1339112_2_1">Commitments and Contingencies (Notes 6 &amp; 7)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xml:lang="en-US" id="id_8501307_1333796_1_1">Commitments and Contingencies Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xml:lang="en-US" id="id_8501307_1333796_2_1">Commitments and Contingencies Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xml:lang="en-US" id="id_8501307_1330698_1_1">Common Stock, Dividends, Per Share, Declared</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xml:lang="en-US" id="id_8501307_1330698_2_1">Dividend Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xml:lang="en-US" id="id_8501307_1330698_12_1">Dividends Declared Per Share of Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockDividendsPerShareDeclared" xlink:to="us-gaap_CommonStockDividendsPerShareDeclared_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_CommonStockEquity" xlink:label="utl_CommonStockEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_CommonStockEquity_lbl" xml:lang="en-US" id="id_8501307_1520123_3_1">Common Stock Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_CommonStockEquity_lbl" xml:lang="en-US" id="id_8501307_1520123_1_1">Common Stock Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="utl_CommonStockEquity_lbl" xml:lang="en-US" id="id_8501307_1520123_4_1">Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="utl_CommonStockEquity_lbl" xml:lang="en-US" id="id_8501307_1520123_5_1">Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="utl_CommonStockEquity_lbl" xml:lang="en-US" id="id_8501307_1520123_6_1">Total Common Stock Equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_CommonStockEquity" xlink:to="utl_CommonStockEquity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember" xlink:label="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_lbl" xml:lang="en-US" id="id_8501307_1330699_1_1">Common Stock Including Additional Paid in Capital [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_lbl" xml:lang="en-US" id="id_8501307_1330699_2_1">Common Equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember" xlink:to="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US" id="id_8501307_1333806_1_1">Common Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US" id="id_8501307_1333806_2_1">Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US" id="id_8501307_1327483_1_1">Common Stock, Shares Authorized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US" id="id_8501307_1327483_2_1">Common Stock Authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_8501307_1327484_1_1">Common Stock, Shares, Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_8501307_1327484_2_1">Common Equity Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US" id="id_8501307_1327484_12_1">Common stock, shares outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStocksIncludingAdditionalPaidInCapital" xlink:label="us-gaap_CommonStocksIncludingAdditionalPaidInCapital"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStocksIncludingAdditionalPaidInCapital_lbl" xml:lang="en-US" id="id_8501307_1339108_1_1">Common Stocks, Including Additional Paid in Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStocksIncludingAdditionalPaidInCapital_lbl" xml:lang="en-US" id="id_8501307_1339108_2_1">Common Equity (Authorized: 25,000,000 and Outstanding: 14,060,147, 13,982,941 and 13,991,430 Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStocksIncludingAdditionalPaidInCapital" xlink:to="us-gaap_CommonStocksIncludingAdditionalPaidInCapital_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xml:lang="en-US" id="id_8501307_1324417_1_1">Compensation and Retirement Disclosure [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xml:lang="en-US" id="id_8501307_1324417_2_1">Compensation and Retirement Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:to="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ConstructionCompletionPeriod" xlink:label="utl_ConstructionCompletionPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ConstructionCompletionPeriod_lbl" xml:lang="en-US" id="id_8501307_1507226_3_1">Construction Completion Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ConstructionCompletionPeriod_lbl" xml:lang="en-US" id="id_8501307_1507226_1_1">Construction Completion Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ConstructionCompletionPeriod_lbl" xml:lang="en-US" id="id_8501307_1507226_2_1">Construction completion period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ConstructionCompletionPeriod" xlink:to="utl_ConstructionCompletionPeriod_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ContractualObligationLineItems" xlink:label="utl_ContractualObligationLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ContractualObligationLineItems_lbl" xml:lang="en-US" id="id_8501307_1438916_3_1">Contractual Obligation [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ContractualObligationLineItems_lbl" xml:lang="en-US" id="id_8501307_1438916_1_1">Contractual Obligation [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ContractualObligationLineItems_lbl" xml:lang="en-US" id="id_8501307_1438916_2_1">Contractual Obligation [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ContractualObligationLineItems" xlink:to="utl_ContractualObligationLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ContractualObligationsMember" xlink:label="utl_ContractualObligationsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ContractualObligationsMember_lbl" xml:lang="en-US" id="id_8501307_1508600_3_1">Contractual Obligations [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ContractualObligationsMember_lbl" xml:lang="en-US" id="id_8501307_1508600_1_1">Contractual Obligations [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ContractualObligationsMember_lbl" xml:lang="en-US" id="id_8501307_1508600_2_1">Energy Supply &amp; Tracker Mechanisms</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ContractualObligationsMember" xlink:to="utl_ContractualObligationsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ContractualObligationTable" xlink:label="utl_ContractualObligationTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ContractualObligationTable_lbl" xml:lang="en-US" id="id_8501307_1487531_3_1">Contractual Obligation [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ContractualObligationTable_lbl" xml:lang="en-US" id="id_8501307_1487531_1_1">Contractual Obligation [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ContractualObligationTable_lbl" xml:lang="en-US" id="id_8501307_1487531_2_1">Contractual Obligation [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ContractualObligationTable" xlink:to="utl_ContractualObligationTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CreditFacilityAxis_lbl" xml:lang="en-US" id="id_8501307_1324497_1_1">Credit Facility [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CreditFacilityAxis_lbl" xml:lang="en-US" id="id_8501307_1324497_2_1">Credit Facility [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CreditFacilityDomain_lbl" xml:lang="en-US" id="id_8501307_1324498_1_1">Credit Facility [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CreditFacilityDomain_lbl" xml:lang="en-US" id="id_8501307_1324498_2_1">Credit Facility [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_CreditFacilityMember_lbl" xml:lang="en-US" id="id_8501307_1504757_3_1">Credit Facility [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xml:lang="en-US" id="id_8501307_1330780_1_1">Current Fiscal Year End Date</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xml:lang="en-US" id="id_8501307_1330799_1_1">Debt Disclosure [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xml:lang="en-US" id="id_8501307_1330800_1_1">Debt Disclosure [Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xml:lang="en-US" id="id_8501307_1324529_2_1">Debt Instrument</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xml:lang="en-US" id="id_8501307_1324530_1_1">Debt Instrument, Basis Spread on Variable Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xml:lang="en-US" id="id_8501307_1324530_2_1">Credit facility, daily fluctuating rate of interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xml:lang="en-US" id="id_8501307_1338231_1_1">Long-term Debt, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xml:lang="en-US" id="id_8501307_1338231_2_1">Total Long-Term Debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCarryingAmount" xlink:to="us-gaap_DebtInstrumentCarryingAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentCovenantDescription" xlink:label="us-gaap_DebtInstrumentCovenantDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xml:lang="en-US" id="id_8501307_1330804_1_1">Debt Instrument, Covenant Description</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xml:lang="en-US" id="id_8501307_1330804_2_1">Percentage of capitalization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCovenantDescription" xlink:to="us-gaap_DebtInstrumentCovenantDescription_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US" id="id_8501307_1327611_1_1">Debt Instrument, Interest Rate, Stated Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US" id="id_8501307_1327611_2_1">Stated interest rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xml:lang="en-US" id="id_8501307_1333918_1_1">Debt Instrument [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xml:lang="en-US" id="id_8501307_1333918_2_1">Debt Instrument [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="us-gaap_DebtInstrumentMaturityDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US" id="id_8501307_1333919_1_1">Debt Instrument, Maturity Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US" id="id_8501307_1333919_2_1">Debt instrument due date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xml:lang="en-US" id="id_8501307_1330814_1_1">Debt Instrument, Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xml:lang="en-US" id="id_8501307_1330814_2_1">Debt Instrument, Name [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentTable_lbl" xml:lang="en-US" id="id_8501307_1333926_1_1">Schedule of Long-term Debt Instruments [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentTable_lbl" xml:lang="en-US" id="id_8501307_1333926_2_1">Schedule of Long-term Debt Instruments [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_DebtIssuanceCostsPolicyTextBlock" xlink:label="utl_DebtIssuanceCostsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_DebtIssuanceCostsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1373341_3_1">Debt Issuance Costs [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_DebtIssuanceCostsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1373341_1_1">Debt Issuance Costs [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_DebtIssuanceCostsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1373341_2_1">Debt Issuance Costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_DebtIssuanceCostsPolicyTextBlock" xlink:to="utl_DebtIssuanceCostsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_8501307_1340298_1_1">Deferred Income Tax Expense (Benefit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_8501307_1340298_2_1">Deferred Tax Provision</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueArrangementByTypeTable" xlink:label="us-gaap_DeferredRevenueArrangementByTypeTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRevenueArrangementByTypeTable_lbl" xml:lang="en-US" id="id_8501307_1324597_1_1">Deferred Revenue Arrangement, by Type [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredRevenueArrangementByTypeTable_lbl" xml:lang="en-US" id="id_8501307_1324597_2_1">Deferred Revenue Arrangement, by Type [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueArrangementByTypeTable" xlink:to="us-gaap_DeferredRevenueArrangementByTypeTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueArrangementLineItems" xlink:label="us-gaap_DeferredRevenueArrangementLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRevenueArrangementLineItems_lbl" xml:lang="en-US" id="id_8501307_1327645_1_1">Deferred Revenue Arrangement [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredRevenueArrangementLineItems_lbl" xml:lang="en-US" id="id_8501307_1327645_2_1">Deferred Revenue Arrangement [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueArrangementLineItems" xlink:to="us-gaap_DeferredRevenueArrangementLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax_lbl" xml:lang="en-US" id="id_8501307_1343156_1_1">Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax_lbl" xml:lang="en-US" id="id_8501307_1343156_2_1">Alternative Minimum tax credit carryforwards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax" xlink:to="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1339049_1_1">Deferred Tax Liabilities, Net, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1339049_2_1">Deferred Income Taxes, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:to="us-gaap_DeferredTaxLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xml:lang="en-US" id="id_8501307_1339045_1_1">Defined Benefit Plan, Amortization of Gains (Losses)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xml:lang="en-US" id="id_8501307_1339045_14_1">Actuarial Loss Amortization</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xml:lang="en-US" id="id_8501307_1342223_1_1">Defined Benefit Plan, Amortization of Prior Service Cost (Credit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xml:lang="en-US" id="id_8501307_1342223_2_1">Prior Service Cost Amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:to="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_lbl" xml:lang="en-US" id="id_8501307_1324610_1_1">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_lbl" xml:lang="en-US" id="id_8501307_1333983_1_1">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_lbl" xml:lang="en-US" id="id_8501307_1333983_2_1">Expected Long-term rate of return on plan assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl" xml:lang="en-US" id="id_8501307_1327667_1_1">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl" xml:lang="en-US" id="id_8501307_1327667_2_1">Rate of Compensation Increase</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitsPaid" xlink:label="us-gaap_DefinedBenefitPlanBenefitsPaid"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanBenefitsPaid_lbl" xml:lang="en-US" id="id_8501307_1343173_1_1">Defined Benefit Plan, Benefits Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanBenefitsPaid_lbl" xml:lang="en-US" id="id_8501307_1343173_2_1">Benefit payments under SERP Plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanBenefitsPaid" xlink:to="us-gaap_DefinedBenefitPlanBenefitsPaid_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_DefinedBenefitPlanCapitalizedAndDeferred" xlink:label="utl_DefinedBenefitPlanCapitalizedAndDeferred"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_DefinedBenefitPlanCapitalizedAndDeferred_lbl" xml:lang="en-US" id="id_8501307_1345472_3_1">Amounts of pension and other post retirement benefit costs capitalized and deferred.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_DefinedBenefitPlanCapitalizedAndDeferred_lbl" xml:lang="en-US" id="id_8501307_1345472_1_1">Defined Benefit Plan, Capitalized and Deferred</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="utl_DefinedBenefitPlanCapitalizedAndDeferred_lbl" xml:lang="en-US" id="id_8501307_1345472_14_1">Amounts Capitalized and Deferred</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_DefinedBenefitPlanCapitalizedAndDeferred" xlink:to="utl_DefinedBenefitPlanCapitalizedAndDeferred_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl" xml:lang="en-US" id="id_8501307_1341281_1_1">Defined Benefit Plan, Contributions by Employer</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl" xml:lang="en-US" id="id_8501307_1341281_2_1">Contributions to benefit plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:to="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xml:lang="en-US" id="id_8501307_1330864_1_1">Defined Benefit Plan Disclosure [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xml:lang="en-US" id="id_8501307_1330864_2_1">Defined Benefit Plan Disclosure [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:to="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear_lbl" xml:lang="en-US" id="id_8501307_1337356_1_1">Defined Benefit Plan, Expected Future Benefit Payments, Remainder of Fiscal Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear_lbl" xml:lang="en-US" id="id_8501307_1337356_2_1">Expected additional benefit payments under SERP Plan in 2016</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xml:lang="en-US" id="id_8501307_1339042_1_1">Defined Benefit Plan, Expected Return on Plan Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xml:lang="en-US" id="id_8501307_1339042_14_1">Expected Return on Plan Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:to="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_DefinedBenefitPlanGrossPeriodicBenefitCost" xlink:label="utl_DefinedBenefitPlanGrossPeriodicBenefitCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_DefinedBenefitPlanGrossPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_8501307_1393128_3_1">The gross amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments).</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_DefinedBenefitPlanGrossPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_8501307_1393128_1_1">Defined Benefit Plan, Gross Periodic Benefit Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="utl_DefinedBenefitPlanGrossPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_8501307_1393128_6_1">Sub-total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_DefinedBenefitPlanGrossPeriodicBenefitCost" xlink:to="utl_DefinedBenefitPlanGrossPeriodicBenefitCost_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear" xlink:label="us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear_lbl" xml:lang="en-US" id="id_8501307_1334001_1_1">Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear_lbl" xml:lang="en-US" id="id_8501307_1334001_2_1">Health Care Cost Trend Rate Assumed for Next Year</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear" xlink:to="us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="us-gaap_DefinedBenefitPlanInterestCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xml:lang="en-US" id="id_8501307_1340330_1_1">Defined Benefit Plan, Interest Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xml:lang="en-US" id="id_8501307_1340330_2_1">Interest Cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanInterestCost" xlink:to="us-gaap_DefinedBenefitPlanInterestCost_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_8501307_1342230_1_1">Defined Benefit Plan, Net Periodic Benefit Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xml:lang="en-US" id="id_8501307_1342230_6_1">Net Periodic Benefit Cost Recognized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_lbl" xml:lang="en-US" id="id_8501307_1330882_1_1">Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_lbl" xml:lang="en-US" id="id_8501307_1330882_2_1">Defined Benefit Plans and Other Postretirement Benefit Plans</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:to="us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="us-gaap_DefinedBenefitPlansDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlansDomain_lbl" xml:lang="en-US" id="id_8501307_1327678_1_1">Defined Benefit Plan and Other Postretirement Benefit Plan [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlansDomain_lbl" xml:lang="en-US" id="id_8501307_1327678_2_1">Defined Benefit Plan and Other Postretirement Benefit Plan [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlansDomain" xlink:to="us-gaap_DefinedBenefitPlansDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="us-gaap_DefinedBenefitPlanServiceCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xml:lang="en-US" id="id_8501307_1343182_1_1">Defined Benefit Plan, Service Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xml:lang="en-US" id="id_8501307_1343182_2_1">Service Cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanServiceCost" xlink:to="us-gaap_DefinedBenefitPlanServiceCost_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate" xlink:label="us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate_lbl" xml:lang="en-US" id="id_8501307_1334004_1_1">Defined Benefit Plan, Ultimate Health Care Cost Trend Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate_lbl" xml:lang="en-US" id="id_8501307_1334004_2_1">Ultimate Health Care Cost Trend Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate" xlink:to="us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate" xlink:label="us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate_lbl" xml:lang="en-US" id="id_8501307_1330887_1_1">Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate_lbl" xml:lang="en-US" id="id_8501307_1330887_2_1">Year that Ultimate Health Care Cost Trend Rate is reached</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate" xlink:to="us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl" xml:lang="en-US" id="id_8501307_1343200_1_1">Derivative Asset, Fair Value, Amount Not Offset Against Collateral</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl" xml:lang="en-US" id="id_8501307_1343200_2_1">Derivative Assets, not designated as hedging instruments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:label="us-gaap_DerivativesPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativesPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1334097_1_1">Derivatives, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DerivativesPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1334097_2_1">Derivatives</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativesPolicyTextBlock" xlink:to="us-gaap_DerivativesPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_DisclosureOfDividendsDeclaredAndPaidTextBlock" xlink:label="utl_DisclosureOfDividendsDeclaredAndPaidTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_DisclosureOfDividendsDeclaredAndPaidTextBlock_lbl" xml:lang="en-US" id="id_8501307_1441249_3_1">Disclosure of Dividends Declared and Paid.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_DisclosureOfDividendsDeclaredAndPaidTextBlock_lbl" xml:lang="en-US" id="id_8501307_1441249_1_1">Disclosure of Dividends Declared and Paid [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_DisclosureOfDividendsDeclaredAndPaidTextBlock_lbl" xml:lang="en-US" id="id_8501307_1441249_2_1">DIVIDENDS DECLARED PER SHARE</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_DisclosureOfDividendsDeclaredAndPaidTextBlock" xlink:to="utl_DisclosureOfDividendsDeclaredAndPaidTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_DivestitureMember" xlink:label="utl_DivestitureMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_DivestitureMember_lbl" xml:lang="en-US" id="id_8501307_1419468_3_1">Divestiture [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_DivestitureMember_lbl" xml:lang="en-US" id="id_8501307_1419468_1_1">Divestiture [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_DivestitureMember_lbl" xml:lang="en-US" id="id_8501307_1419468_2_1">Power Supply Contract Divestitures</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_DivestitureMember" xlink:to="utl_DivestitureMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_DividendAndDistributionReinvestmentAndSharePurchasePlanMember" xlink:label="utl_DividendAndDistributionReinvestmentAndSharePurchasePlanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_DividendAndDistributionReinvestmentAndSharePurchasePlanMember_lbl" xml:lang="en-US" id="id_8501307_1479680_3_1">Dividend and Distribution Reinvestment and Share Purchase Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_DividendAndDistributionReinvestmentAndSharePurchasePlanMember_lbl" xml:lang="en-US" id="id_8501307_1479680_1_1">Dividend and Distribution Reinvestment and Share Purchase Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_DividendAndDistributionReinvestmentAndSharePurchasePlanMember_lbl" xml:lang="en-US" id="id_8501307_1479680_2_1">Dividend and Distribution Reinvestment and Share Purchase Plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_DividendAndDistributionReinvestmentAndSharePurchasePlanMember" xlink:to="utl_DividendAndDistributionReinvestmentAndSharePurchasePlanMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xml:lang="en-US" id="id_8501307_1327836_1_1">Dividends Payable, Date to be Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xml:lang="en-US" id="id_8501307_1327836_2_1">Date Paid (Payable)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:to="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsAxis" xlink:label="us-gaap_DividendsAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsAxis_lbl" xml:lang="en-US" id="id_8501307_1324808_1_1">Dividends [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsAxis_lbl" xml:lang="en-US" id="id_8501307_1324808_2_1">Dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsAxis" xlink:to="us-gaap_DividendsAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsCommonStock" xlink:label="us-gaap_DividendsCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsCommonStock_lbl" xml:lang="en-US" id="id_8501307_1342281_1_1">Dividends, Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DividendsCommonStock_lbl" xml:lang="en-US" id="id_8501307_1342281_14_1">Dividends on Common Shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCommonStock" xlink:to="us-gaap_DividendsCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsDeclaredTableTextBlock" xlink:label="us-gaap_DividendsDeclaredTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsDeclaredTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1327838_1_1">Dividends Declared [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsDeclaredTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1327838_2_1">Schedule of Dividends Declared</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsDeclaredTableTextBlock" xlink:to="us-gaap_DividendsDeclaredTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsDomain" xlink:label="us-gaap_DividendsDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsDomain_lbl" xml:lang="en-US" id="id_8501307_1334153_1_1">Dividends [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsDomain_lbl" xml:lang="en-US" id="id_8501307_1334153_2_1">Dividends [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsDomain" xlink:to="us-gaap_DividendsDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsPayableDateDeclaredDayMonthAndYear" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl" xml:lang="en-US" id="id_8501307_1324756_1_1">Dividends Payable, Date Declared</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl" xml:lang="en-US" id="id_8501307_1324756_2_1">Declaration Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear" xlink:to="us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" xml:lang="en-US" id="id_8501307_1334155_1_1">Dividends Payable, Date of Record</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" xml:lang="en-US" id="id_8501307_1334155_2_1">Shareholder of Record Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:to="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsPayableLineItems" xlink:label="us-gaap_DividendsPayableLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPayableLineItems_lbl" xml:lang="en-US" id="id_8501307_1327840_1_1">Dividends Payable [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsPayableLineItems_lbl" xml:lang="en-US" id="id_8501307_1327840_2_1">Dividends Payable [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableLineItems" xlink:to="us-gaap_DividendsPayableLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsPayableTable" xlink:label="us-gaap_DividendsPayableTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPayableTable_lbl" xml:lang="en-US" id="id_8501307_1324759_1_1">Dividends Payable [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsPayableTable_lbl" xml:lang="en-US" id="id_8501307_1324759_2_1">Dividends Payable [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableTable" xlink:to="us-gaap_DividendsPayableTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsPreferredStock" xlink:label="us-gaap_DividendsPreferredStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPreferredStock_lbl" xml:lang="en-US" id="id_8501307_1341327_1_1">Dividends, Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsPreferredStock_lbl" xml:lang="en-US" id="id_8501307_1341327_2_1">Dividend declared</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStock" xlink:to="us-gaap_DividendsPreferredStock_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_DocumentAndEntityInformationAbstract" xlink:label="utl_DocumentAndEntityInformationAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US" id="id_8501307_1386744_3_1">Document and Entity Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US" id="id_8501307_1386744_1_1">Document And Entity Information [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US" id="id_8501307_1386744_2_1">Document And Entity Information [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_DocumentAndEntityInformationAbstract" xlink:to="utl_DocumentAndEntityInformationAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US" id="id_8501307_1324767_1_1">Document Fiscal Period Focus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xml:lang="en-US" id="id_8501307_1324767_2_1">Document Fiscal Period Focus</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US" id="id_8501307_1324768_1_1">Document Fiscal Year Focus</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentFiscalYearFocus_lbl" xml:lang="en-US" id="id_8501307_1324768_2_1">Document Fiscal Year Focus</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentInformationLineItems_lbl" xml:lang="en-US" id="id_8501307_1324770_1_1">Document Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentInformationLineItems_lbl" xml:lang="en-US" id="id_8501307_1324770_2_1">Document Information [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentInformationLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationTable" xlink:label="dei_DocumentInformationTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentInformationTable_lbl" xml:lang="en-US" id="id_8501307_1327843_1_1">Document Information [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentInformationTable_lbl" xml:lang="en-US" id="id_8501307_1327843_2_1">Document Information [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentInformationTable" xlink:to="dei_DocumentInformationTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US" id="id_8501307_1331044_1_1">Document Period End Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US" id="id_8501307_1331044_2_1">Document Period End Date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentType_lbl" xml:lang="en-US" id="id_8501307_1324772_1_1">Document Type</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentType_lbl" xml:lang="en-US" id="id_8501307_1324772_2_1">Document Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xml:lang="en-US" id="id_8501307_1334165_1_1">Earnings Per Share, Basic and Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xml:lang="en-US" id="id_8501307_1334165_2_1">Net Income Per Common Share (Basic and Diluted)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_EffectiveDate" xlink:label="utl_EffectiveDate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_EffectiveDate_lbl" xml:lang="en-US" id="id_8501307_1478364_3_1">Effective Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_EffectiveDate_lbl" xml:lang="en-US" id="id_8501307_1478364_1_1">Effective Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_EffectiveDate_lbl" xml:lang="en-US" id="id_8501307_1478364_2_1">Annual TIRA Adjustment, effective date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_EffectiveDate" xlink:to="utl_EffectiveDate_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ElectricityMember" xlink:label="utl_ElectricityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ElectricityMember_lbl" xml:lang="en-US" id="id_8501307_1402841_3_1">Electricity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ElectricityMember_lbl" xml:lang="en-US" id="id_8501307_1402841_1_1">Electricity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ElectricityMember_lbl" xml:lang="en-US" id="id_8501307_1402841_2_1">Electricity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ElectricityMember" xlink:to="utl_ElectricityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ElectricTransmissionMember" xlink:label="us-gaap_ElectricTransmissionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ElectricTransmissionMember_lbl" xml:lang="en-US" id="id_8501307_1324849_1_1">Electric Transmission [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ElectricTransmissionMember_lbl" xml:lang="en-US" id="id_8501307_1324849_2_1">Electric base</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EnvironmentalLossContingencyDisclosureTextBlock_lbl" xml:lang="en-US" id="id_8501307_1331148_2_1">ENVIRONMENTAL MATTERS</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_EnvironmentalMattersMember_lbl" xml:lang="en-US" id="id_8501307_1511389_3_1">Environmental Matters [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_EnvironmentalMattersMember_lbl" xml:lang="en-US" id="id_8501307_1511389_1_1">Environmental Matters [Member]</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ExpectedCompletionYearMonthOfFacility" xlink:label="utl_ExpectedCompletionYearMonthOfFacility"/>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FacilityPowerCapacity" xlink:label="utl_FacilityPowerCapacity"/>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xml:lang="en-US" id="id_8501307_1324896_1_1">Fair Value, Hierarchy [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xml:lang="en-US" id="id_8501307_1324896_2_1">Fair Value, Hierarchy</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:label="us-gaap_FairValueByLiabilityClassAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xml:lang="en-US" id="id_8501307_1334319_1_1">Liability Class [Axis]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByLiabilityClassAxis" xlink:to="us-gaap_FairValueByLiabilityClassAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems" xlink:label="us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems_lbl" xml:lang="en-US" id="id_8501307_1331235_1_1">Fair Value Inputs, Assets, Quantitative Information [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems_lbl" xml:lang="en-US" id="id_8501307_1331235_2_1">Fair Value Inputs, Assets, Quantitative Information [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems" xlink:to="us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsAssetsQuantitativeInformationTable" xlink:label="us-gaap_FairValueInputsAssetsQuantitativeInformationTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsAssetsQuantitativeInformationTable_lbl" xml:lang="en-US" id="id_8501307_1327981_1_1">Fair Value Inputs, Assets, Quantitative Information [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsAssetsQuantitativeInformationTable_lbl" xml:lang="en-US" id="id_8501307_1327981_2_1">Fair Value Inputs, Assets, Quantitative Information [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsAssetsQuantitativeInformationTable" xlink:to="us-gaap_FairValueInputsAssetsQuantitativeInformationTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xml:lang="en-US" id="id_8501307_1327983_1_1">Fair Value, Inputs, Level 1 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xml:lang="en-US" id="id_8501307_1327983_2_1">Fair Value, Inputs, Level 1</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xml:lang="en-US" id="id_8501307_1331240_1_1">Fair Value, Inputs, Level 2 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xml:lang="en-US" id="id_8501307_1331240_2_1">Fair Value, Inputs, Level 2</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xml:lang="en-US" id="id_8501307_1331256_1_1">Fair Value by Liability Class [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xml:lang="en-US" id="id_8501307_1331256_2_1">Fair Value by Liability Class [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xml:lang="en-US" id="id_8501307_1324950_1_1">Fair Value Hierarchy [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xml:lang="en-US" id="id_8501307_1324950_2_1">Fair Value Hierarchy [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FairValueOfRestrictedStockUnitsSettledInCash" xlink:label="utl_FairValueOfRestrictedStockUnitsSettledInCash"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FairValueOfRestrictedStockUnitsSettledInCash_lbl" xml:lang="en-US" id="id_8501307_1473972_3_1">Fair Value of Restricted Stock Units to be settled in cash.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FairValueOfRestrictedStockUnitsSettledInCash_lbl" xml:lang="en-US" id="id_8501307_1473972_1_1">Fair Value of Restricted Stock Units Settled in Cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FairValueOfRestrictedStockUnitsSettledInCash_lbl" xml:lang="en-US" id="id_8501307_1473972_2_1">Fair value of liabilities associated with fully vested RSUs that will be settled in cash</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FairValueOfRestrictedStockUnitsSettledInCash" xlink:to="utl_FairValueOfRestrictedStockUnitsSettledInCash_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FederalMember" xlink:label="utl_FederalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FederalMember_lbl" xml:lang="en-US" id="id_8501307_1351290_3_1">Federal [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FederalMember_lbl" xml:lang="en-US" id="id_8501307_1351290_1_1">Federal [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FederalMember_lbl" xml:lang="en-US" id="id_8501307_1351290_2_1">Federal</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FederalMember" xlink:to="utl_FederalMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FirstAmendmentMember" xlink:label="utl_FirstAmendmentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FirstAmendmentMember_lbl" xml:lang="en-US" id="id_8501307_1508577_3_1">First Amendment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FirstAmendmentMember_lbl" xml:lang="en-US" id="id_8501307_1508577_1_1">First Amendment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FirstAmendmentMember_lbl" xml:lang="en-US" id="id_8501307_1508577_2_1">First Annual Adjustment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FirstAmendmentMember" xlink:to="utl_FirstAmendmentMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FirstMortgageBondsEightPointFourNinePercentDueOctoberFourteenTwentyTwentyFourMember" xlink:label="utl_FirstMortgageBondsEightPointFourNinePercentDueOctoberFourteenTwentyTwentyFourMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FirstMortgageBondsEightPointFourNinePercentDueOctoberFourteenTwentyTwentyFourMember_lbl" xml:lang="en-US" id="id_8501307_1510689_3_1">First Mortgage Bonds Eight Point Four Nine Percent Due October Fourteen Twenty Twenty Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FirstMortgageBondsEightPointFourNinePercentDueOctoberFourteenTwentyTwentyFourMember_lbl" xml:lang="en-US" id="id_8501307_1510689_1_1">First Mortgage Bonds Eight Point Four Nine Percent Due October Fourteen Twenty Twenty Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FirstMortgageBondsEightPointFourNinePercentDueOctoberFourteenTwentyTwentyFourMember_lbl" xml:lang="en-US" id="id_8501307_1510689_2_1">First Mortgage Bonds 8.49% Series, Due October 14, 2024</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FirstMortgageBondsEightPointFourNinePercentDueOctoberFourteenTwentyTwentyFourMember" xlink:to="utl_FirstMortgageBondsEightPointFourNinePercentDueOctoberFourteenTwentyTwentyFourMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FirstMortgageBondsEightPointZeroZeroPercentDueMayOneTwentyThirtyOneMember" xlink:label="utl_FirstMortgageBondsEightPointZeroZeroPercentDueMayOneTwentyThirtyOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FirstMortgageBondsEightPointZeroZeroPercentDueMayOneTwentyThirtyOneMember_lbl" xml:lang="en-US" id="id_8501307_1433902_3_1">First Mortgage Bonds Eight Point Zero Zero Percent Due May One Twenty Thirty One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FirstMortgageBondsEightPointZeroZeroPercentDueMayOneTwentyThirtyOneMember_lbl" xml:lang="en-US" id="id_8501307_1433902_1_1">First Mortgage Bonds Eight Point Zero Zero Percent Due May One Twenty Thirty One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FirstMortgageBondsEightPointZeroZeroPercentDueMayOneTwentyThirtyOneMember_lbl" xml:lang="en-US" id="id_8501307_1433902_2_1">First Mortgage Bonds 8.00% Series, Due May 1, 2031</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FirstMortgageBondsEightPointZeroZeroPercentDueMayOneTwentyThirtyOneMember" xlink:to="utl_FirstMortgageBondsEightPointZeroZeroPercentDueMayOneTwentyThirtyOneMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FirstMortgageBondsFivePointTwoFourPercentDueMarchTwoTwentyTwentyMember" xlink:label="utl_FirstMortgageBondsFivePointTwoFourPercentDueMarchTwoTwentyTwentyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FirstMortgageBondsFivePointTwoFourPercentDueMarchTwoTwentyTwentyMember_lbl" xml:lang="en-US" id="id_8501307_1373535_3_1">First Mortgage Bonds Five Point Two Four Percent Due March Two Twenty Twenty [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FirstMortgageBondsFivePointTwoFourPercentDueMarchTwoTwentyTwentyMember_lbl" xml:lang="en-US" id="id_8501307_1373535_1_1">First Mortgage Bonds Five Point Two Four Percent Due March Two Twenty Twenty [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FirstMortgageBondsFivePointTwoFourPercentDueMarchTwoTwentyTwentyMember_lbl" xml:lang="en-US" id="id_8501307_1373535_2_1">First Mortgage Bonds 5.24% Series, Due March 2, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FirstMortgageBondsFivePointTwoFourPercentDueMarchTwoTwentyTwentyMember" xlink:to="utl_FirstMortgageBondsFivePointTwoFourPercentDueMarchTwoTwentyTwentyMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FirstMortgageBondsSixPointNineSixPercentDueSeptemberOneTwentyTwentyEightMember" xlink:label="utl_FirstMortgageBondsSixPointNineSixPercentDueSeptemberOneTwentyTwentyEightMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FirstMortgageBondsSixPointNineSixPercentDueSeptemberOneTwentyTwentyEightMember_lbl" xml:lang="en-US" id="id_8501307_1453023_3_1">First Mortgage Bonds Six Point Nine Six Percent Due September One Twenty Twenty Eight [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FirstMortgageBondsSixPointNineSixPercentDueSeptemberOneTwentyTwentyEightMember_lbl" xml:lang="en-US" id="id_8501307_1453023_1_1">First Mortgage Bonds Six Point Nine Six Percent Due September One Twenty Twenty Eight [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FirstMortgageBondsSixPointNineSixPercentDueSeptemberOneTwentyTwentyEightMember_lbl" xml:lang="en-US" id="id_8501307_1453023_2_1">First Mortgage Bonds 6.96% Series, Due September 1, 2028</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FirstMortgageBondsSixPointNineSixPercentDueSeptemberOneTwentyTwentyEightMember" xlink:to="utl_FirstMortgageBondsSixPointNineSixPercentDueSeptemberOneTwentyTwentyEightMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FirstMortgageBondsSixPointThreeTwoPercentDueSeptemberFifteenTwentyThirtySixMember" xlink:label="utl_FirstMortgageBondsSixPointThreeTwoPercentDueSeptemberFifteenTwentyThirtySixMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FirstMortgageBondsSixPointThreeTwoPercentDueSeptemberFifteenTwentyThirtySixMember_lbl" xml:lang="en-US" id="id_8501307_1373472_3_1">First Mortgage Bonds Six Point Three Two Percent Due September Fifteen Twenty Thirty Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FirstMortgageBondsSixPointThreeTwoPercentDueSeptemberFifteenTwentyThirtySixMember_lbl" xml:lang="en-US" id="id_8501307_1373472_1_1">First Mortgage Bonds Six Point Three Two Percent Due September Fifteen Twenty Thirty Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FirstMortgageBondsSixPointThreeTwoPercentDueSeptemberFifteenTwentyThirtySixMember_lbl" xml:lang="en-US" id="id_8501307_1373472_2_1">First Mortgage Bonds 6.32% Series, Due September 15, 2036</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FirstMortgageBondsSixPointThreeTwoPercentDueSeptemberFifteenTwentyThirtySixMember" xlink:to="utl_FirstMortgageBondsSixPointThreeTwoPercentDueSeptemberFifteenTwentyThirtySixMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_FitchburgGasAndElectricLightCompanyMember" xlink:label="utl_FitchburgGasAndElectricLightCompanyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_FitchburgGasAndElectricLightCompanyMember_lbl" xml:lang="en-US" id="id_8501307_1426756_3_1">Fitchburg Gas and Electric Light Company [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_FitchburgGasAndElectricLightCompanyMember_lbl" xml:lang="en-US" id="id_8501307_1426756_1_1">Fitchburg Gas and Electric Light Company [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_FitchburgGasAndElectricLightCompanyMember_lbl" xml:lang="en-US" id="id_8501307_1426756_2_1">Fitchburg Gas and Electric Light Company</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_FitchburgGasAndElectricLightCompanyMember" xlink:to="utl_FitchburgGasAndElectricLightCompanyMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FixedIncomeFundsMember" xlink:label="us-gaap_FixedIncomeFundsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FixedIncomeFundsMember_lbl" xml:lang="en-US" id="id_8501307_1325052_1_1">Fixed Income Funds [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FixedIncomeFundsMember_lbl" xml:lang="en-US" id="id_8501307_1325052_2_1">Fixed Income Funds</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FixedIncomeFundsMember" xlink:to="us-gaap_FixedIncomeFundsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GasDistributionMember" xlink:label="us-gaap_GasDistributionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GasDistributionMember_lbl" xml:lang="en-US" id="id_8501307_1328166_1_1">Gas Distribution [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GasDistributionMember_lbl" xml:lang="en-US" id="id_8501307_1328166_2_1">Natural Gas Distribution</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GasDistributionMember" xlink:to="us-gaap_GasDistributionMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GasPipelineRefundMember" xlink:label="utl_GasPipelineRefundMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GasPipelineRefundMember_lbl" xml:lang="en-US" id="id_8501307_1358359_3_1">Gas Pipeline Refund [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GasPipelineRefundMember_lbl" xml:lang="en-US" id="id_8501307_1358359_1_1">Gas Pipeline Refund [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GasPipelineRefundMember_lbl" xml:lang="en-US" id="id_8501307_1358359_2_1">Gas Pipeline Refund</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GasPipelineRefundMember" xlink:to="utl_GasPipelineRefundMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GasSegmentMember" xlink:label="utl_GasSegmentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GasSegmentMember_lbl" xml:lang="en-US" id="id_8501307_1410032_3_1">Gas Segment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GasSegmentMember_lbl" xml:lang="en-US" id="id_8501307_1410032_1_1">Gas Segment [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GasSegmentMember_lbl" xml:lang="en-US" id="id_8501307_1410032_2_1">Gas Segment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GasSegmentMember" xlink:to="utl_GasSegmentMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GasTransmissionMember" xlink:label="us-gaap_GasTransmissionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GasTransmissionMember_lbl" xml:lang="en-US" id="id_8501307_1331401_1_1">Gas Transmission [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GasTransmissionMember_lbl" xml:lang="en-US" id="id_8501307_1331401_2_1">Gas base</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GasTransmissionMember" xlink:to="us-gaap_GasTransmissionMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GasTransportationAndStorageMember" xlink:label="utl_GasTransportationAndStorageMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GasTransportationAndStorageMember_lbl" xml:lang="en-US" id="id_8501307_1387937_3_1">Gas Transportation and Storage [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GasTransportationAndStorageMember_lbl" xml:lang="en-US" id="id_8501307_1387937_1_1">Gas Transportation and Storage [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GasTransportationAndStorageMember_lbl" xml:lang="en-US" id="id_8501307_1387937_2_1">Gas Transportation and Storage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GasTransportationAndStorageMember" xlink:to="utl_GasTransportationAndStorageMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GracePeriodForIssuingOrReceivingRefunds" xlink:label="utl_GracePeriodForIssuingOrReceivingRefunds"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GracePeriodForIssuingOrReceivingRefunds_lbl" xml:lang="en-US" id="id_8501307_1345712_3_1">Grace Period for Issuing or Receiving Refunds</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GracePeriodForIssuingOrReceivingRefunds_lbl" xml:lang="en-US" id="id_8501307_1345712_1_1">Grace Period for Issuing or Receiving Refunds</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GracePeriodForIssuingOrReceivingRefunds_lbl" xml:lang="en-US" id="id_8501307_1345712_2_1">Grace period to receive refund</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GracePeriodForIssuingOrReceivingRefunds" xlink:to="utl_GracePeriodForIssuingOrReceivingRefunds_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GraniteStateGasTransmissionIncMember" xlink:label="utl_GraniteStateGasTransmissionIncMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GraniteStateGasTransmissionIncMember_lbl" xml:lang="en-US" id="id_8501307_1374827_3_1">Granite State Gas Transmission Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GraniteStateGasTransmissionIncMember_lbl" xml:lang="en-US" id="id_8501307_1374827_1_1">Granite State Gas Transmission Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GraniteStateGasTransmissionIncMember_lbl" xml:lang="en-US" id="id_8501307_1374827_2_1">Granite State Gas Transmission Inc</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GraniteStateGasTransmissionIncMember" xlink:to="utl_GraniteStateGasTransmissionIncMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GroupEightMember" xlink:label="utl_GroupEightMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GroupEightMember_lbl" xml:lang="en-US" id="id_8501307_1470328_3_1">Group Eight [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GroupEightMember_lbl" xml:lang="en-US" id="id_8501307_1470328_1_1">Group Eight [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GroupEightMember_lbl" xml:lang="en-US" id="id_8501307_1470328_2_1">Group Eight</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GroupEightMember" xlink:to="utl_GroupEightMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GroupFiveMember" xlink:label="utl_GroupFiveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GroupFiveMember_lbl" xml:lang="en-US" id="id_8501307_1357374_3_1">Group Five [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GroupFiveMember_lbl" xml:lang="en-US" id="id_8501307_1357374_1_1">Group Five [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GroupFiveMember_lbl" xml:lang="en-US" id="id_8501307_1357374_2_1">Group Five</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GroupFiveMember" xlink:to="utl_GroupFiveMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GroupFourMember" xlink:label="utl_GroupFourMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GroupFourMember_lbl" xml:lang="en-US" id="id_8501307_1505313_3_1">Group Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GroupFourMember_lbl" xml:lang="en-US" id="id_8501307_1505313_1_1">Group Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GroupFourMember_lbl" xml:lang="en-US" id="id_8501307_1505313_2_1">Group Four</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GroupFourMember" xlink:to="utl_GroupFourMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GroupOneMember" xlink:label="utl_GroupOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GroupOneMember_lbl" xml:lang="en-US" id="id_8501307_1413222_3_1">Group One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GroupOneMember_lbl" xml:lang="en-US" id="id_8501307_1413222_1_1">Group One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GroupOneMember_lbl" xml:lang="en-US" id="id_8501307_1413222_2_1">Group One</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GroupOneMember" xlink:to="utl_GroupOneMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GroupSevenMember" xlink:label="utl_GroupSevenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GroupSevenMember_lbl" xml:lang="en-US" id="id_8501307_1434352_3_1">Group Seven [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GroupSevenMember_lbl" xml:lang="en-US" id="id_8501307_1434352_1_1">Group Seven [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GroupSevenMember_lbl" xml:lang="en-US" id="id_8501307_1434352_2_1">Group Seven</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GroupSevenMember" xlink:to="utl_GroupSevenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GroupSixMember" xlink:label="utl_GroupSixMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GroupSixMember_lbl" xml:lang="en-US" id="id_8501307_1509008_3_1">Group Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GroupSixMember_lbl" xml:lang="en-US" id="id_8501307_1509008_1_1">Group Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GroupSixMember_lbl" xml:lang="en-US" id="id_8501307_1509008_2_1">Group Six</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GroupSixMember" xlink:to="utl_GroupSixMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GroupThreeMember" xlink:label="utl_GroupThreeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GroupThreeMember_lbl" xml:lang="en-US" id="id_8501307_1351312_3_1">Group Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GroupThreeMember_lbl" xml:lang="en-US" id="id_8501307_1351312_1_1">Group Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GroupThreeMember_lbl" xml:lang="en-US" id="id_8501307_1351312_2_1">Group Three</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GroupThreeMember" xlink:to="utl_GroupThreeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_GroupTwoMember" xlink:label="utl_GroupTwoMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_GroupTwoMember_lbl" xml:lang="en-US" id="id_8501307_1493963_3_1">Group Two [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_GroupTwoMember_lbl" xml:lang="en-US" id="id_8501307_1493963_1_1">Group Two [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_GroupTwoMember_lbl" xml:lang="en-US" id="id_8501307_1493963_2_1">Group Two</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_GroupTwoMember" xlink:to="utl_GroupTwoMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="us-gaap_HedgingDesignationAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_HedgingDesignationAxis_lbl" xml:lang="en-US" id="id_8501307_1328221_1_1">Hedging Designation [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_HedgingDesignationAxis_lbl" xml:lang="en-US" id="id_8501307_1328221_2_1">Hedging Designation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingDesignationAxis" xlink:to="us-gaap_HedgingDesignationAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="us-gaap_HedgingDesignationDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_HedgingDesignationDomain_lbl" xml:lang="en-US" id="id_8501307_1331461_1_1">Hedging Designation [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_HedgingDesignationDomain_lbl" xml:lang="en-US" id="id_8501307_1331461_2_1">Hedging Designation [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingDesignationDomain" xlink:to="us-gaap_HedgingDesignationDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xml:lang="en-US" id="id_8501307_1339760_1_1">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xml:lang="en-US" id="id_8501307_1339760_6_1">Income Before Income Taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xml:lang="en-US" id="id_8501307_1325223_1_1">Income Statement [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xml:lang="en-US" id="id_8501307_1325223_2_1">Income Statement [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="us-gaap_IncomeTaxAuthorityAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxAuthorityAxis_lbl" xml:lang="en-US" id="id_8501307_1325224_1_1">Income Tax Authority [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxAuthorityAxis_lbl" xml:lang="en-US" id="id_8501307_1325224_2_1">Income Tax Authority</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxAuthorityAxis" xlink:to="us-gaap_IncomeTaxAuthorityAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="us-gaap_IncomeTaxAuthorityDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxAuthorityDomain_lbl" xml:lang="en-US" id="id_8501307_1334668_1_1">Income Tax Authority [Domain]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxAuthorityDomain" xlink:to="us-gaap_IncomeTaxAuthorityDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_IncomeTaxesMember_lbl" xml:lang="en-US" id="id_8501307_1492165_2_1">Income Taxes</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xml:lang="en-US" id="id_8501307_1338852_1_1">Income Taxes Paid, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xml:lang="en-US" id="id_8501307_1338852_2_1">Income Taxes Paid</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaidNet" xlink:to="us-gaap_IncomeTaxesPaidNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="us-gaap_IncomeTaxesReceivable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxesReceivable_lbl" xml:lang="en-US" id="id_8501307_1343406_1_1">Income Taxes Receivable, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxesReceivable_lbl" xml:lang="en-US" id="id_8501307_1343406_2_1">Taxes Refundable</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExaminationDescription" xlink:label="us-gaap_IncomeTaxExaminationDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExaminationDescription_lbl" xml:lang="en-US" id="id_8501307_1331533_1_1">Income Tax Examination, Description</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_8501307_1340505_1_1">Income Tax Expense (Benefit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_8501307_1340505_2_1">Income tax benefit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US" id="id_8501307_1340505_12_1">Income Tax Expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="us-gaap_IncomeTaxPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1334674_1_1">Income Tax, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1334674_2_1">Income Taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxPolicyTextBlock" xlink:to="us-gaap_IncomeTaxPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xml:lang="en-US" id="id_8501307_1340519_1_1">Increase (Decrease) in Accounts Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xml:lang="en-US" id="id_8501307_1340519_2_1">Accounts Payable</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xml:lang="en-US" id="id_8501307_1337998_1_1">Increase (Decrease) in Accounts Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xml:lang="en-US" id="id_8501307_1337998_14_1">Accounts Receivable</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedTaxesPayable" xlink:label="us-gaap_IncreaseDecreaseInAccruedTaxesPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccruedTaxesPayable_lbl" xml:lang="en-US" id="id_8501307_1340517_1_1">Increase (Decrease) in Accrued Taxes Payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccruedTaxesPayable_lbl" xml:lang="en-US" id="id_8501307_1340517_2_1">Taxes Payable</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_IncreaseDecreaseInGasInventoryFinancing" xlink:label="utl_IncreaseDecreaseInGasInventoryFinancing"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_IncreaseDecreaseInGasInventoryFinancing_lbl" xml:lang="en-US" id="id_8501307_1494776_3_1">The net change during the reporting period in exchange gas financing.</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_IncreaseDecreaseInLongTermDebt" xlink:label="utl_IncreaseDecreaseInLongTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_IncreaseDecreaseInLongTermDebt_lbl" xml:lang="en-US" id="id_8501307_1523153_3_1">Increase (Decrease) in Long Term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_IncreaseDecreaseInLongTermDebt_lbl" xml:lang="en-US" id="id_8501307_1523153_1_1">Increase (Decrease) in Long Term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_IncreaseDecreaseInLongTermDebt_lbl" xml:lang="en-US" id="id_8501307_1523153_2_1">Reduction of long-term debt</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US" id="id_8501307_1328317_1_1">Increase (Decrease) in Operating Capital [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US" id="id_8501307_1328317_2_1">Changes in Working Capital Items:</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet_lbl" xml:lang="en-US" id="id_8501307_1339731_1_1">Increase (Decrease) in Other Current Assets and Liabilities, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet_lbl" xml:lang="en-US" id="id_8501307_1339731_14_1">Other Changes in Working Capital Items</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets" xlink:label="us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_lbl" xml:lang="en-US" id="id_8501307_1337138_1_1">Increase (Decrease) in Other Noncurrent Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_lbl" xml:lang="en-US" id="id_8501307_1337138_2_1">Reduction of other assets</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xml:lang="en-US" id="id_8501307_1337976_1_1">Increase (Decrease) in Other Operating Assets and Liabilities, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xml:lang="en-US" id="id_8501307_1337976_14_1">Other, net</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables" xlink:label="us-gaap_IncreaseDecreaseInReceivables"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInReceivables_lbl" xml:lang="en-US" id="id_8501307_1339725_14_1">Exchange Gas Receivable</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInRegulatoryClauseRevenue" xlink:label="us-gaap_IncreaseDecreaseInRegulatoryClauseRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInRegulatoryClauseRevenue_lbl" xml:lang="en-US" id="id_8501307_1342464_1_1">Increase (Decrease) in Regulatory Clause Revenue</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInRegulatoryLiabilities_lbl" xml:lang="en-US" id="id_8501307_1340535_1_1">Increase (Decrease) in Regulatory Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInRegulatoryLiabilities_lbl" xml:lang="en-US" id="id_8501307_1340535_2_1">Regulatory Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInRegulatoryLiabilities" xlink:to="us-gaap_IncreaseDecreaseInRegulatoryLiabilities_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInUnbilledReceivables_lbl" xml:lang="en-US" id="id_8501307_1337134_1_1">Increase (Decrease) in Unbilled Receivables</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInUnbilledReceivables_lbl" xml:lang="en-US" id="id_8501307_1337134_14_1">Accrued Revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInUnbilledReceivables" xlink:to="us-gaap_IncreaseDecreaseInUnbilledReceivables_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_InfrastructureReplacementAdjustment" xlink:label="utl_InfrastructureReplacementAdjustment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_InfrastructureReplacementAdjustment_lbl" xml:lang="en-US" id="id_8501307_1408586_3_1">Infrastructure Replacement Adjustment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_InfrastructureReplacementAdjustment_lbl" xml:lang="en-US" id="id_8501307_1408586_1_1">Infrastructure Replacement Adjustment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_InfrastructureReplacementAdjustment_lbl" xml:lang="en-US" id="id_8501307_1408586_2_1">Annual TIRA Adjustment</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl" xml:lang="en-US" id="id_8501307_1337111_1_1">Interest Income (Expense), Nonoperating, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl" xml:lang="en-US" id="id_8501307_1337111_14_1">Interest Expense, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeExpenseNonoperatingNet" xlink:to="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaidNet_lbl" xml:lang="en-US" id="id_8501307_1337941_1_1">Interest Paid, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestPaidNet_lbl" xml:lang="en-US" id="id_8501307_1337941_2_1">Interest Paid</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaidNet" xlink:to="us-gaap_InterestPaidNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:label="us-gaap_InterestPayableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPayableCurrent_lbl" xml:lang="en-US" id="id_8501307_1337942_1_1">Interest Payable, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestPayableCurrent_lbl" xml:lang="en-US" id="id_8501307_1337942_2_1">Interest Payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPayableCurrent" xlink:to="us-gaap_InterestPayableCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InternalRevenueServiceIRSMember" xlink:label="us-gaap_InternalRevenueServiceIRSMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InternalRevenueServiceIRSMember_lbl" xml:lang="en-US" id="id_8501307_1325288_1_1">Internal Revenue Service (IRS) [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InternalRevenueServiceIRSMember_lbl" xml:lang="en-US" id="id_8501307_1325288_2_1">Internal Revenue Service (IRS)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InternalRevenueServiceIRSMember" xlink:to="us-gaap_InternalRevenueServiceIRSMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="us-gaap_InventoryPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1325296_1_1">Inventory, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1325296_2_1">Gas Inventory</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryPolicyTextBlock" xlink:to="us-gaap_InventoryPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1331645_1_1">Investment Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1331645_2_1">Summary of Investments, Other than Investments in Related Parties, by Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xml:lang="en-US" id="id_8501307_1328442_1_1">Investments [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xml:lang="en-US" id="id_8501307_1328442_2_1">Investments [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_InvestmentTypeCategorizationMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LatestTaxYearMember" xlink:label="us-gaap_LatestTaxYearMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LatestTaxYearMember_lbl" xml:lang="en-US" id="id_8501307_1328472_1_1">Latest Tax Year [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LatestTaxYearMember_lbl" xml:lang="en-US" id="id_8501307_1328472_2_1">2016 expenditures</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LatestTaxYearMember" xlink:to="us-gaap_LatestTaxYearMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US" id="id_8501307_1328480_1_1">Legal Entity [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US" id="id_8501307_1328480_2_1">Legal Entity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_LengthOfPipeline" xlink:label="utl_LengthOfPipeline"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_LengthOfPipeline_lbl" xml:lang="en-US" id="id_8501307_1349633_3_1">Length of natural gas transmission pipeline.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_LengthOfPipeline_lbl" xml:lang="en-US" id="id_8501307_1349633_1_1">Length Of Pipeline</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_LengthOfPipeline_lbl" xml:lang="en-US" id="id_8501307_1349633_2_1">Length Of Pipeline</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_LengthOfPipeline" xlink:to="utl_LengthOfPipeline_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_LetterOfCreditFacilityAndBankGuaranteesOutstanding" xlink:label="utl_LetterOfCreditFacilityAndBankGuaranteesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_LetterOfCreditFacilityAndBankGuaranteesOutstanding_lbl" xml:lang="en-US" id="id_8501307_1386043_3_1">Corporate guarantees on energy and natural gas storage management contracts entered into by the Company's distribution utilities.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_LetterOfCreditFacilityAndBankGuaranteesOutstanding_lbl" xml:lang="en-US" id="id_8501307_1386043_1_1">Letter Of Credit Facility And Bank Guarantees Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_LetterOfCreditFacilityAndBankGuaranteesOutstanding_lbl" xml:lang="en-US" id="id_8501307_1386043_2_1">Guarantee outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_LetterOfCreditFacilityAndBankGuaranteesOutstanding" xlink:to="utl_LetterOfCreditFacilityAndBankGuaranteesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="us-gaap_LettersOfCreditOutstandingAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xml:lang="en-US" id="id_8501307_1338766_1_1">Letters of Credit Outstanding, Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xml:lang="en-US" id="id_8501307_1338766_2_1">Letters of Credit Outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LettersOfCreditOutstandingAmount" xlink:to="us-gaap_LettersOfCreditOutstandingAmount_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_8501307_1337091_1_1">Liabilities and Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US" id="id_8501307_1337091_6_1">TOTAL LIABILITIES AND CAPITALIZATION</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_8501307_1328488_1_1">Liabilities and Equity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_8501307_1328488_2_1">LIABILITIES AND CAPITALIZATION:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="id_8501307_1339671_1_1">Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US" id="id_8501307_1339671_6_1">Total Current Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="id_8501307_1334857_1_1">Liabilities, Current [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US" id="id_8501307_1334857_2_1">Current Liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="us-gaap_LiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1337916_1_1">Liabilities, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1337916_6_1">Total Noncurrent Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesNoncurrent" xlink:to="us-gaap_LiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xml:lang="en-US" id="id_8501307_1328492_1_1">Liabilities, Noncurrent [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl" xml:lang="en-US" id="id_8501307_1328492_2_1">Noncurrent Liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_LiabilitiesNoncurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xml:lang="en-US" id="id_8501307_1331746_1_1">Line of Credit Facility, Expiration Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xml:lang="en-US" id="id_8501307_1331746_2_1">Revolving credit facility termination date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityExpirationDate1" xlink:to="us-gaap_LineOfCreditFacilityExpirationDate1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="us-gaap_LineOfCreditFacilityLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityLineItems_lbl" xml:lang="en-US" id="id_8501307_1328569_1_1">Line of Credit Facility [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityLineItems_lbl" xml:lang="en-US" id="id_8501307_1328569_2_1">Line of Credit Facility [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityLineItems" xlink:to="us-gaap_LineOfCreditFacilityLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US" id="id_8501307_1337893_1_1">Line of Credit Facility, Maximum Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US" id="id_8501307_1337893_2_1">Revolving credit facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_LineOfCreditFacilityMaximumIncreaseToAggregateCommitments" xlink:label="utl_LineOfCreditFacilityMaximumIncreaseToAggregateCommitments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_LineOfCreditFacilityMaximumIncreaseToAggregateCommitments_lbl" xml:lang="en-US" id="id_8501307_1418120_3_1">Line Of Credit Facility Maximum Increase To Aggregate Commitments.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_LineOfCreditFacilityMaximumIncreaseToAggregateCommitments_lbl" xml:lang="en-US" id="id_8501307_1418120_2_1">Credit Facility by an aggregate additional amount</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xml:lang="en-US" id="id_8501307_1339655_1_1">Line of Credit Facility, Remaining Borrowing Capacity</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xml:lang="en-US" id="id_8501307_1331776_1_1">London Interbank Offered Rate (LIBOR) [Member]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US" id="id_8501307_1339643_1_1">Long-term Debt</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xml:lang="en-US" id="id_8501307_1339631_1_1">Long-term Debt, Current Maturities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xml:lang="en-US" id="id_8501307_1339631_2_1">Less: Current Portion</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:label="us-gaap_LongTermDebtFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xml:lang="en-US" id="id_8501307_1337041_1_1">Long-term Debt, Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xml:lang="en-US" id="id_8501307_1337041_2_1">Estimated Fair Value of Long-Term Debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtFairValue" xlink:to="us-gaap_LongTermDebtFairValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1337872_1_1">Long-term Debt, Excluding Current Maturities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1337872_2_1">Long-Term Debt, Less Current Portion</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1337872_12_1">Total Long-term Debt, Less Current Portion</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xml:lang="en-US" id="id_8501307_1331811_1_1">Loss Contingency Nature [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xml:lang="en-US" id="id_8501307_1331811_2_1">Loss Contingency Nature</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:to="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="us-gaap_LossContingencyNatureDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xml:lang="en-US" id="id_8501307_1334989_1_1">Loss Contingency, Nature [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xml:lang="en-US" id="id_8501307_1334989_2_1">Loss Contingency, Nature [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyNatureDomain" xlink:to="us-gaap_LossContingencyNatureDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MarketableSecuritiesPolicy" xlink:label="us-gaap_MarketableSecuritiesPolicy"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesPolicy_lbl" xml:lang="en-US" id="id_8501307_1335019_1_1">Marketable Securities, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesPolicy_lbl" xml:lang="en-US" id="id_8501307_1335019_2_1">Investments in Marketable Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesPolicy" xlink:to="us-gaap_MarketableSecuritiesPolicy_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MarketableSecuritiesTextBlock" xlink:label="us-gaap_MarketableSecuritiesTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesTextBlock_lbl" xml:lang="en-US" id="id_8501307_1331851_1_1">Marketable Securities [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesTextBlock_lbl" xml:lang="en-US" id="id_8501307_1331851_2_1">Fair Value of Marketable Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesTextBlock" xlink:to="us-gaap_MarketableSecuritiesTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="us-gaap_MaximumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US" id="id_8501307_1328677_1_1">Maximum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US" id="id_8501307_1328677_2_1">Maximum</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MaximumMember" xlink:to="us-gaap_MaximumMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd#stpr_ME" xlink:label="stpr_ME"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="stpr_ME_lbl" xml:lang="en-US" id="id_8501307_1331861_1_1">MAINE</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="stpr_ME_lbl" xml:lang="en-US" id="id_8501307_1331861_2_1">Maine</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="stpr_ME" xlink:to="stpr_ME_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NaturalGasAndOilProvedReservesMultiplierToCoverFairValueOfTransactionsOutstanding" xlink:label="utl_NaturalGasAndOilProvedReservesMultiplierToCoverFairValueOfTransactionsOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NaturalGasAndOilProvedReservesMultiplierToCoverFairValueOfTransactionsOutstanding_lbl" xml:lang="en-US" id="id_8501307_1455295_3_1">Amount of natural gas purchase contracts outstanding under hedging program.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NaturalGasAndOilProvedReservesMultiplierToCoverFairValueOfTransactionsOutstanding_lbl" xml:lang="en-US" id="id_8501307_1455295_1_1">Natural Gas And Oil Proved Reserves Multiplier To Cover Fair Value Of Transactions Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NaturalGasAndOilProvedReservesMultiplierToCoverFairValueOfTransactionsOutstanding_lbl" xml:lang="en-US" id="id_8501307_1455295_2_1">Number of Natural Gas Storage Outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NaturalGasAndOilProvedReservesMultiplierToCoverFairValueOfTransactionsOutstanding" xlink:to="utl_NaturalGasAndOilProvedReservesMultiplierToCoverFairValueOfTransactionsOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NaturalGasLiquidsReservesMember" xlink:label="us-gaap_NaturalGasLiquidsReservesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NaturalGasLiquidsReservesMember_lbl" xml:lang="en-US" id="id_8501307_1331932_1_1">Natural Gas Liquids [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NaturalGasLiquidsReservesMember_lbl" xml:lang="en-US" id="id_8501307_1331932_2_1">Liquefied Natural Gas &amp; Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NaturalGasLiquidsReservesMember" xlink:to="us-gaap_NaturalGasLiquidsReservesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NatureOfOperationsPolicyTextBlock" xlink:label="utl_NatureOfOperationsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NatureOfOperationsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1401322_3_1">Description of the Company and its subsidiaries businesses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NatureOfOperationsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1401322_1_1">Nature of Operations [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NatureOfOperationsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1401322_2_1">Nature of Operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NatureOfOperationsPolicyTextBlock" xlink:to="utl_NatureOfOperationsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_8501307_1342613_1_1">Net Cash Provided by (Used in) Financing Activities, Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_8501307_1342613_6_1">Cash Provided by (Used in) Financing Activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_8501307_1328785_1_1">Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_8501307_1328785_2_1">Financing Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_8501307_1340686_1_1">Net Cash Provided by (Used in) Investing Activities, Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_8501307_1340686_2_1">Cash (Used in) Investing Activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_8501307_1328782_1_1">Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_8501307_1328782_2_1">Investing Activities:</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_8501307_1325627_1_1">Net Cash Provided by (Used in) Operating Activities, Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_lbl" xml:lang="en-US" id="id_8501307_1325627_6_1">Cash Provided by Operating Activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_8501307_1325628_1_1">Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_lbl" xml:lang="en-US" id="id_8501307_1325628_2_1">Operating Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_8501307_1337830_1_1">Net Income (Loss) Attributable to Parent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_8501307_1337830_2_1">Net Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US" id="id_8501307_1337830_6_1">Net Income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_8501307_1339589_1_1">Net Income (Loss) Available to Common Stockholders, Basic</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US" id="id_8501307_1339589_2_1">Segment Profit (Loss)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NetOperatingLossAndTaxCreditCarryForward" xlink:label="utl_NetOperatingLossAndTaxCreditCarryForward"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NetOperatingLossAndTaxCreditCarryForward_lbl" xml:lang="en-US" id="id_8501307_1399089_3_1">Net Operating Loss And Tax Credit Carry Forward</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NetOperatingLossAndTaxCreditCarryForward_lbl" xml:lang="en-US" id="id_8501307_1399089_1_1">Net Operating Loss And Tax Credit Carry Forward</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NetOperatingLossAndTaxCreditCarryForward_lbl" xml:lang="en-US" id="id_8501307_1399089_2_1">NOL carryforward assets and Research and Development (R&amp;D) credit carryforwards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NetOperatingLossAndTaxCreditCarryForward" xlink:to="utl_NetOperatingLossAndTaxCreditCarryForward_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NetOperatingLossCarryforwardsExpirationYear" xlink:label="utl_NetOperatingLossCarryforwardsExpirationYear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NetOperatingLossCarryforwardsExpirationYear_lbl" xml:lang="en-US" id="id_8501307_1439960_3_1">Net Operating Loss Carryforwards, Expiration Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NetOperatingLossCarryforwardsExpirationYear_lbl" xml:lang="en-US" id="id_8501307_1439960_1_1">Net Operating Loss Carryforwards, Expiration Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NetOperatingLossCarryforwardsExpirationYear_lbl" xml:lang="en-US" id="id_8501307_1439960_2_1">NOL carryforward assets expiration date</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NetOperatingLossCarryforwardsExpirationYear" xlink:to="utl_NetOperatingLossCarryforwardsExpirationYear_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NewEnglandMember" xlink:label="utl_NewEnglandMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NewEnglandMember_lbl" xml:lang="en-US" id="id_8501307_1364819_3_1">New England [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NewEnglandMember_lbl" xml:lang="en-US" id="id_8501307_1364819_1_1">New England [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NewEnglandMember_lbl" xml:lang="en-US" id="id_8501307_1364819_2_1">ISO-NE Obligations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NewEnglandMember" xlink:to="utl_NewEnglandMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd#stpr_NH" xlink:label="stpr_NH"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="stpr_NH_lbl" xml:lang="en-US" id="id_8501307_1331964_1_1">NEW HAMPSHIRE</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="stpr_NH_lbl" xml:lang="en-US" id="id_8501307_1331964_2_1">New Hampshire</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="stpr_NH" xlink:to="stpr_NH_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NoncashInvestingActivityAbstract" xlink:label="utl_NoncashInvestingActivityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NoncashInvestingActivityAbstract_lbl" xml:lang="en-US" id="id_8501307_1394907_3_1">Noncash Investing Activity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NoncashInvestingActivityAbstract_lbl" xml:lang="en-US" id="id_8501307_1394907_1_1">Noncash Investing Activity [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NoncashInvestingActivityAbstract_lbl" xml:lang="en-US" id="id_8501307_1394907_2_1">Non-cash Investing Activity:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NoncashInvestingActivityAbstract" xlink:to="utl_NoncashInvestingActivityAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="us-gaap_NondesignatedMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NondesignatedMember_lbl" xml:lang="en-US" id="id_8501307_1331981_1_1">Not Designated as Hedging Instrument [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NondesignatedMember_lbl" xml:lang="en-US" id="id_8501307_1331981_2_1">Not Designated as Hedging Instruments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NondesignatedMember" xlink:to="us-gaap_NondesignatedMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NorthernUtilitiesIncMember" xlink:label="utl_NorthernUtilitiesIncMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NorthernUtilitiesIncMember_lbl" xml:lang="en-US" id="id_8501307_1510485_3_1">Northern Utilities Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NorthernUtilitiesIncMember_lbl" xml:lang="en-US" id="id_8501307_1510485_1_1">Northern Utilities Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NorthernUtilitiesIncMember_lbl" xml:lang="en-US" id="id_8501307_1510485_2_1">Northern Utilities Inc</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NorthernUtilitiesIncMember" xlink:to="utl_NorthernUtilitiesIncMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NotesFivePointNineZeroPercentDueDecemberFifteenTwentyThirtyMember" xlink:label="utl_NotesFivePointNineZeroPercentDueDecemberFifteenTwentyThirtyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NotesFivePointNineZeroPercentDueDecemberFifteenTwentyThirtyMember_lbl" xml:lang="en-US" id="id_8501307_1455998_3_1">Notes Five Point Nine Zero Percent Due December Fifteen Twenty Thirty [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NotesFivePointNineZeroPercentDueDecemberFifteenTwentyThirtyMember_lbl" xml:lang="en-US" id="id_8501307_1455998_1_1">Notes Five Point Nine Zero Percent Due December Fifteen Twenty Thirty [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NotesFivePointNineZeroPercentDueDecemberFifteenTwentyThirtyMember_lbl" xml:lang="en-US" id="id_8501307_1455998_2_1">5.90% Notes, Due December 15, 2030</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NotesFivePointNineZeroPercentDueDecemberFifteenTwentyThirtyMember" xlink:to="utl_NotesFivePointNineZeroPercentDueDecemberFifteenTwentyThirtyMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NotesSevenPointNineEightPercentDueJuneOneTwentyThirtyOneMember" xlink:label="utl_NotesSevenPointNineEightPercentDueJuneOneTwentyThirtyOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NotesSevenPointNineEightPercentDueJuneOneTwentyThirtyOneMember_lbl" xml:lang="en-US" id="id_8501307_1489203_3_1">Notes Seven Point Nine Eight Percent Due June One Twenty Thirty One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NotesSevenPointNineEightPercentDueJuneOneTwentyThirtyOneMember_lbl" xml:lang="en-US" id="id_8501307_1489203_1_1">Notes Seven Point Nine Eight Percent Due June One Twenty Thirty One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NotesSevenPointNineEightPercentDueJuneOneTwentyThirtyOneMember_lbl" xml:lang="en-US" id="id_8501307_1489203_2_1">7.98% Notes, Due June 1, 2031</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NotesSevenPointNineEightPercentDueJuneOneTwentyThirtyOneMember" xlink:to="utl_NotesSevenPointNineEightPercentDueJuneOneTwentyThirtyOneMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NotesSevenPointThreeSevenPercentDueJanuaryFifteenTwentyTwentyNineMember" xlink:label="utl_NotesSevenPointThreeSevenPercentDueJanuaryFifteenTwentyTwentyNineMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NotesSevenPointThreeSevenPercentDueJanuaryFifteenTwentyTwentyNineMember_lbl" xml:lang="en-US" id="id_8501307_1364664_3_1">Notes Seven Point Three Seven Percent Due January Fifteen Twenty Twenty Nine [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NotesSevenPointThreeSevenPercentDueJanuaryFifteenTwentyTwentyNineMember_lbl" xml:lang="en-US" id="id_8501307_1364664_1_1">Notes Seven Point Three Seven Percent Due January Fifteen Twenty Twenty Nine [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NotesSevenPointThreeSevenPercentDueJanuaryFifteenTwentyTwentyNineMember_lbl" xml:lang="en-US" id="id_8501307_1364664_2_1">7.37% Notes, Due January 15, 2029</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NotesSevenPointThreeSevenPercentDueJanuaryFifteenTwentyTwentyNineMember" xlink:to="utl_NotesSevenPointThreeSevenPercentDueJanuaryFifteenTwentyTwentyNineMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NotesSixPointSevenFivePercentDueNovemberThirtyTwentyTwentyThreeMember" xlink:label="utl_NotesSixPointSevenFivePercentDueNovemberThirtyTwentyTwentyThreeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NotesSixPointSevenFivePercentDueNovemberThirtyTwentyTwentyThreeMember_lbl" xml:lang="en-US" id="id_8501307_1368793_3_1">Notes Six Point Seven Five Percent Due November Thirty Twenty Twenty Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NotesSixPointSevenFivePercentDueNovemberThirtyTwentyTwentyThreeMember_lbl" xml:lang="en-US" id="id_8501307_1368793_1_1">Notes Six Point Seven Five Percent Due November Thirty Twenty Twenty Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NotesSixPointSevenFivePercentDueNovemberThirtyTwentyTwentyThreeMember_lbl" xml:lang="en-US" id="id_8501307_1368793_2_1">6.75% Notes, Due November 30, 2023</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NotesSixPointSevenFivePercentDueNovemberThirtyTwentyTwentyThreeMember" xlink:to="utl_NotesSixPointSevenFivePercentDueNovemberThirtyTwentyTwentyThreeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NotesSixPointSevenNinePercentDueOctoberFifteenTwentyTwentyFiveMember" xlink:label="utl_NotesSixPointSevenNinePercentDueOctoberFifteenTwentyTwentyFiveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NotesSixPointSevenNinePercentDueOctoberFifteenTwentyTwentyFiveMember_lbl" xml:lang="en-US" id="id_8501307_1472987_3_1">Notes Six Point Seven Nine Percent Due October Fifteen Twenty Twenty Five [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NotesSixPointSevenNinePercentDueOctoberFifteenTwentyTwentyFiveMember_lbl" xml:lang="en-US" id="id_8501307_1472987_1_1">Notes Six Point Seven Nine Percent Due October Fifteen Twenty Twenty Five [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NotesSixPointSevenNinePercentDueOctoberFifteenTwentyTwentyFiveMember_lbl" xml:lang="en-US" id="id_8501307_1472987_2_1">6.79% Notes, Due October 15, 2025</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NotesSixPointSevenNinePercentDueOctoberFifteenTwentyTwentyFiveMember" xlink:to="utl_NotesSixPointSevenNinePercentDueOctoberFifteenTwentyTwentyFiveMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NumberOfNewCustomers" xlink:label="utl_NumberOfNewCustomers"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NumberOfNewCustomers_lbl" xml:lang="en-US" id="id_8501307_1530694_3_1">Number Of New Customers</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NumberOfNewCustomers_lbl" xml:lang="en-US" id="id_8501307_1530694_1_1">Number Of New Customers</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NumberOfNewCustomers_lbl" xml:lang="en-US" id="id_8501307_1530694_2_1">Number of new customers</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NumberOfNewCustomers" xlink:to="utl_NumberOfNewCustomers_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NumberOfStatesInWhichEntityOperates" xlink:label="us-gaap_NumberOfStatesInWhichEntityOperates"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NumberOfStatesInWhichEntityOperates_lbl" xml:lang="en-US" id="id_8501307_1328836_1_1">Number of States in which Entity Operates</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NumberOfStatesInWhichEntityOperates_lbl" xml:lang="en-US" id="id_8501307_1328836_2_1">Number of states with electric distribution companies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfStatesInWhichEntityOperates" xlink:to="us-gaap_NumberOfStatesInWhichEntityOperates_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_NumberOfSubsidiaries" xlink:label="utl_NumberOfSubsidiaries"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_NumberOfSubsidiaries_lbl" xml:lang="en-US" id="id_8501307_1424232_3_1">Number of Subsidiaries.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_NumberOfSubsidiaries_lbl" xml:lang="en-US" id="id_8501307_1424232_1_1">Number of Subsidiaries</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_NumberOfSubsidiaries_lbl" xml:lang="en-US" id="id_8501307_1424232_2_1">Number of Subsidiaries</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_NumberOfSubsidiaries" xlink:to="utl_NumberOfSubsidiaries_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ObligationsMember" xlink:label="us-gaap_ObligationsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ObligationsMember_lbl" xml:lang="en-US" id="id_8501307_1325675_1_1">Obligations [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ObligationsMember_lbl" xml:lang="en-US" id="id_8501307_1325675_2_1">Exchange Gas Obligation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ObligationsMember" xlink:to="us-gaap_ObligationsMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_OffshoreEnergyMember" xlink:label="utl_OffshoreEnergyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_OffshoreEnergyMember_lbl" xml:lang="en-US" id="id_8501307_1433814_3_1">Offshore Energy [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_OffshoreEnergyMember_lbl" xml:lang="en-US" id="id_8501307_1433814_1_1">Offshore Energy [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_OffshoreEnergyMember_lbl" xml:lang="en-US" id="id_8501307_1433814_2_1">Offshore Wind Energy</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_OffshoreEnergyMember" xlink:to="utl_OffshoreEnergyMember_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsMember_lbl" xml:lang="en-US" id="id_8501307_1325719_1_1">Other Assets [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssetsMember_lbl" xml:lang="en-US" id="id_8501307_1325719_2_1">Other Assets</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1343602_2_1">Other Assets</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="us-gaap_OtherLiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_8501307_1338621_1_1">Other Liabilities, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xml:lang="en-US" id="id_8501307_1338621_2_1">Other Current Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesCurrent" xlink:to="us-gaap_OtherLiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1336939_1_1">Other Liabilities, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1336939_2_1">Other Noncurrent Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesNoncurrent" xlink:to="us-gaap_OtherLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_8501307_1339526_1_1">Other Nonoperating Income (Expense)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xml:lang="en-US" id="id_8501307_1339526_14_1">Other Expense, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1335252_1_1">Other Postretirement Benefit Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1335252_2_1">Other Postretirement Benefit Plans, Defined Benefit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:to="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="us-gaap_OtherReceivablesNetCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xml:lang="en-US" id="id_8501307_1342681_1_1">Other Receivables, Net, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xml:lang="en-US" id="id_8501307_1342681_2_1">Exchange Gas Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherReceivablesNetCurrent_lbl" xml:lang="en-US" id="id_8501307_1342681_12_1">Total Exchange Gas Receivable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherReceivablesNetCurrent" xlink:to="us-gaap_OtherReceivablesNetCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherSalesRevenueNet" xlink:label="us-gaap_OtherSalesRevenueNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherSalesRevenueNet_lbl" xml:lang="en-US" id="id_8501307_1336925_1_1">Other Revenue, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherSalesRevenueNet_lbl" xml:lang="en-US" id="id_8501307_1336925_2_1">Other</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_OtherSubsidiariesMember_lbl" xml:lang="en-US" id="id_8501307_1409171_3_1">Other Subsidiaries [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_OtherSubsidiariesMember_lbl" xml:lang="en-US" id="id_8501307_1409171_1_1">Other Subsidiaries [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_OtherSubsidiariesMember_lbl" xml:lang="en-US" id="id_8501307_1409171_2_1">Unitil Service; Unitil Realty; and Unitil Resources</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="us-gaap_PaymentsOfDividends"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfDividends_lbl" xml:lang="en-US" id="id_8501307_1338577_1_1">Payments of Dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfDividends_lbl" xml:lang="en-US" id="id_8501307_1338577_14_1">Dividends Paid</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_8501307_1336880_1_1">Payments to Acquire Property, Plant, and Equipment</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US" id="id_8501307_1336880_2_1">Capital Expenditures</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent" xlink:label="us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1338552_1_1">Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1338552_2_1">Retirement Benefit Obligations</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xml:lang="en-US" id="id_8501307_1332141_1_1">Pension and Other Postretirement Benefits Disclosure [Text Block]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="us-gaap_PensionPlansDefinedBenefitMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1328998_1_1">Pension Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1328998_2_1">Pension Plans</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionPlansDefinedBenefitMember" xlink:to="us-gaap_PensionPlansDefinedBenefitMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCashWhenSettled" xlink:label="utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCashWhenSettled"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCashWhenSettled_lbl" xml:lang="en-US" id="id_8501307_1362228_3_1">Percentage of fully-vested restricted stock units that Directors will receive in cash when settled.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCashWhenSettled_lbl" xml:lang="en-US" id="id_8501307_1362228_1_1">Percentage of Fully Vested Restricted Stock Units That Directors will Receive in Cash when Settled</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCashWhenSettled_lbl" xml:lang="en-US" id="id_8501307_1362228_2_1">Percentage of fully-vested restricted stock units that directors will receive in cash when settled</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCommonSharesWhenSettled" xlink:label="utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCommonSharesWhenSettled"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCommonSharesWhenSettled_lbl" xml:lang="en-US" id="id_8501307_1481028_3_1">Percentage of fully-vested restricted stock units that Directors will receive in common shares when settled.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCommonSharesWhenSettled_lbl" xml:lang="en-US" id="id_8501307_1481028_1_1">Percentage of Fully Vested Restricted Stock Units That Directors will Receive in Common Shares when Settled</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PercentageOfFullyVestedRestrictedStockUnitsThatDirectorsWillReceiveInCommonSharesWhenSettled_lbl" xml:lang="en-US" id="id_8501307_1481028_2_1">Percentage of fully-vested restricted stock units that directors will receive in common shares when settled</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PercentageOfRevenueIncrease" xlink:label="utl_PercentageOfRevenueIncrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PercentageOfRevenueIncrease_lbl" xml:lang="en-US" id="id_8501307_1444791_3_1">Percentage Of Revenue Increase.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PercentageOfRevenueIncrease_lbl" xml:lang="en-US" id="id_8501307_1444791_1_1">Percentage Of Revenue Increase</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PercentageOfRevenueIncrease_lbl" xml:lang="en-US" id="id_8501307_1444791_2_1">Percent of increase in total revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PercentageOfRevenueIncrease" xlink:to="utl_PercentageOfRevenueIncrease_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PeriodAxis" xlink:label="utl_PeriodAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PeriodAxis_lbl" xml:lang="en-US" id="id_8501307_1367440_3_1">Period [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PeriodAxis_lbl" xml:lang="en-US" id="id_8501307_1367440_1_1">Period [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PeriodAxis_lbl" xml:lang="en-US" id="id_8501307_1367440_2_1">Period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PeriodAxis" xlink:to="utl_PeriodAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PeriodDomain" xlink:label="utl_PeriodDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PeriodDomain_lbl" xml:lang="en-US" id="id_8501307_1386517_3_1">Period [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PeriodDomain_lbl" xml:lang="en-US" id="id_8501307_1386517_1_1">Period [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PeriodDomain_lbl" xml:lang="en-US" id="id_8501307_1386517_2_1">Period [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PeriodDomain" xlink:to="utl_PeriodDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PeriodFiveMember" xlink:label="utl_PeriodFiveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PeriodFiveMember_lbl" xml:lang="en-US" id="id_8501307_1405818_3_1">Period 5 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PeriodFiveMember_lbl" xml:lang="en-US" id="id_8501307_1405818_1_1">Period 5 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PeriodFiveMember_lbl" xml:lang="en-US" id="id_8501307_1405818_2_1">Recovered over the next seven and a half years</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PeriodFiveMember" xlink:to="utl_PeriodFiveMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PeriodFourMember" xlink:label="utl_PeriodFourMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PeriodFourMember_lbl" xml:lang="en-US" id="id_8501307_1483592_3_1">Period 4 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PeriodFourMember_lbl" xml:lang="en-US" id="id_8501307_1483592_1_1">Period 4 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PeriodFourMember_lbl" xml:lang="en-US" id="id_8501307_1483592_2_1">Recovered over the next two and a half years</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PeriodFourMember" xlink:to="utl_PeriodFourMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PeriodSevenMember" xlink:label="utl_PeriodSevenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PeriodSevenMember_lbl" xml:lang="en-US" id="id_8501307_1377826_3_1">Period 7 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PeriodSevenMember_lbl" xml:lang="en-US" id="id_8501307_1377826_1_1">Period 7 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PeriodSevenMember_lbl" xml:lang="en-US" id="id_8501307_1377826_2_1">Cumulative capital investments for 2015 and 2016</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PeriodSevenMember" xlink:to="utl_PeriodSevenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PeriodTypeAxis" xlink:label="utl_PeriodTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PeriodTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1470349_3_1">Period Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PeriodTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1470349_1_1">Period Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PeriodTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1470349_2_1">Period Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PeriodTypeAxis" xlink:to="utl_PeriodTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PeriodTypeDomain" xlink:label="utl_PeriodTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PeriodTypeDomain_lbl" xml:lang="en-US" id="id_8501307_1452211_3_1">Period Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PeriodTypeDomain_lbl" xml:lang="en-US" id="id_8501307_1452211_1_1">Period Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PeriodTypeDomain_lbl" xml:lang="en-US" id="id_8501307_1452211_2_1">Period Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PeriodTypeDomain" xlink:to="utl_PeriodTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PostretirementBenefitMember" xlink:label="utl_PostretirementBenefitMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PostretirementBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1505289_3_1">Postretirement Benefit [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PostretirementBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1505289_1_1">Postretirement Benefit [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PostretirementBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1505289_2_1">Retirement Benefits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PostretirementBenefitMember" xlink:to="utl_PostretirementBenefitMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PotentialRegulatedOperatingRevenue" xlink:label="utl_PotentialRegulatedOperatingRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PotentialRegulatedOperatingRevenue_lbl" xml:lang="en-US" id="id_8501307_1530695_3_1">Potential Regulated Operating Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PotentialRegulatedOperatingRevenue_lbl" xml:lang="en-US" id="id_8501307_1530695_1_1">Potential Regulated Operating Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PotentialRegulatedOperatingRevenue_lbl" xml:lang="en-US" id="id_8501307_1530695_2_1">Potential regulated operating revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PotentialRegulatedOperatingRevenue" xlink:to="utl_PotentialRegulatedOperatingRevenue_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PowerGenerationCapacity" xlink:label="utl_PowerGenerationCapacity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PowerGenerationCapacity_lbl" xml:lang="en-US" id="id_8501307_1439852_3_1">Power Generation Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PowerGenerationCapacity_lbl" xml:lang="en-US" id="id_8501307_1439852_1_1">Power Generation Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PowerGenerationCapacity_lbl" xml:lang="en-US" id="id_8501307_1439852_2_1">Power generation capacity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PowerGenerationCapacity" xlink:to="utl_PowerGenerationCapacity_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockDividendRatePercentage" xlink:label="us-gaap_PreferredStockDividendRatePercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockDividendRatePercentage_lbl" xml:lang="en-US" id="id_8501307_1335359_1_1">Preferred Stock, Dividend Rate, Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockDividendRatePercentage_lbl" xml:lang="en-US" id="id_8501307_1335359_2_1">Dividend rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendRatePercentage" xlink:to="us-gaap_PreferredStockDividendRatePercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="us-gaap_PreferredStockSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US" id="id_8501307_1325830_1_1">Preferred Stock, Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US" id="id_8501307_1325830_2_1">Preferred stock, outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US" id="id_8501307_1336848_1_1">Preferred Stock, Value, Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US" id="id_8501307_1336848_2_1">Preferred Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssets" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets_lbl" xml:lang="en-US" id="id_8501307_1342734_1_1">Prepaid Expense and Other Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets_lbl" xml:lang="en-US" id="id_8501307_1342734_2_1">Prepayments and Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssets" xlink:to="us-gaap_PrepaidExpenseAndOtherAssets_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xml:lang="en-US" id="id_8501307_1340826_1_1">Proceeds from Issuance of Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xml:lang="en-US" id="id_8501307_1340826_2_1">Proceeds from Issuance of Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xml:lang="en-US" id="id_8501307_1340826_12_1">Proceeds from Issuance of Common Stock, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xml:lang="en-US" id="id_8501307_1343719_1_1">Proceeds from Issuance of Long-term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xml:lang="en-US" id="id_8501307_1343719_2_1">Issuance of Long-Term Debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromLegalSettlements" xlink:label="us-gaap_ProceedsFromLegalSettlements"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromLegalSettlements_lbl" xml:lang="en-US" id="id_8501307_1342776_1_1">Proceeds from Legal Settlements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromLegalSettlements_lbl" xml:lang="en-US" id="id_8501307_1342776_2_1">Pipeline refund received</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromLegalSettlements" xlink:to="us-gaap_ProceedsFromLegalSettlements_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="us-gaap_ProceedsFromLinesOfCredit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromLinesOfCredit_lbl" xml:lang="en-US" id="id_8501307_1342778_1_1">Proceeds from Lines of Credit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromLinesOfCredit_lbl" xml:lang="en-US" id="id_8501307_1342778_2_1">Proceeds from lines of credit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromLinesOfCredit" xlink:to="us-gaap_ProceedsFromLinesOfCredit_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ProceedsFromRepaymentsOfDebtAndCapitalLeaseObligations" xlink:label="utl_ProceedsFromRepaymentsOfDebtAndCapitalLeaseObligations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ProceedsFromRepaymentsOfDebtAndCapitalLeaseObligations_lbl" xml:lang="en-US" id="id_8501307_1480440_3_1">Proceeds from (Repayments of) Debt and Capital Lease Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ProceedsFromRepaymentsOfDebtAndCapitalLeaseObligations_lbl" xml:lang="en-US" id="id_8501307_1480440_1_1">Proceeds from (Repayments of) Debt and Capital Lease Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ProceedsFromRepaymentsOfDebtAndCapitalLeaseObligations_lbl" xml:lang="en-US" id="id_8501307_1480440_2_1">(Decrease) Increase in Capital Lease Obligations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ProceedsFromRepaymentsOfDebtAndCapitalLeaseObligations" xlink:to="utl_ProceedsFromRepaymentsOfDebtAndCapitalLeaseObligations_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="us-gaap_ProceedsFromRepaymentsOfShortTermDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromRepaymentsOfShortTermDebt_lbl" xml:lang="en-US" id="id_8501307_1341815_1_1">Proceeds from (Repayments of) Short-term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromRepaymentsOfShortTermDebt_lbl" xml:lang="en-US" id="id_8501307_1341815_2_1">Repayment of Short-Term Debt, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:to="us-gaap_ProceedsFromRepaymentsOfShortTermDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1335441_1_1">Property, Plant and Equipment, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1335441_2_1">Utility Plant</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ProposedBaseRateIncrease" xlink:label="utl_ProposedBaseRateIncrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ProposedBaseRateIncrease_lbl" xml:lang="en-US" id="id_8501307_1372877_3_1">Proposed Base Rate Increase</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ProposedBaseRateIncrease_lbl" xml:lang="en-US" id="id_8501307_1372877_1_1">Proposed Base Rate Increase</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ProposedBaseRateIncrease_lbl" xml:lang="en-US" id="id_8501307_1372877_2_1">Increase in base rates, amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ProposedBaseRateIncrease" xlink:to="utl_ProposedBaseRateIncrease_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage" xlink:label="us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_lbl" xml:lang="en-US" id="id_8501307_1335450_1_1">Public Utilities, Approved Return on Equity, Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_lbl" xml:lang="en-US" id="id_8501307_1335450_2_1">Percentage of approved return on equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage" xlink:to="us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesDisclosureTextBlock" xlink:label="us-gaap_PublicUtilitiesDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesDisclosureTextBlock_lbl" xml:lang="en-US" id="id_8501307_1332260_1_1">Public Utilities Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesDisclosureTextBlock_lbl" xml:lang="en-US" id="id_8501307_1332260_2_1">REGULATORY MATTERS</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesDisclosureTextBlock" xlink:to="us-gaap_PublicUtilitiesDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesInventoryAxis" xlink:label="us-gaap_PublicUtilitiesInventoryAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesInventoryAxis_lbl" xml:lang="en-US" id="id_8501307_1332263_1_1">Inventory [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesInventoryAxis_lbl" xml:lang="en-US" id="id_8501307_1332263_2_1">Inventory [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesInventoryAxis" xlink:to="us-gaap_PublicUtilitiesInventoryAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesInventoryLineItems" xlink:label="us-gaap_PublicUtilitiesInventoryLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesInventoryLineItems_lbl" xml:lang="en-US" id="id_8501307_1325907_1_1">Public Utilities, Inventory [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesInventoryLineItems_lbl" xml:lang="en-US" id="id_8501307_1325907_2_1">Public Utilities, Inventory [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesInventoryLineItems" xlink:to="us-gaap_PublicUtilitiesInventoryLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesInventoryNaturalGasMember" xlink:label="us-gaap_PublicUtilitiesInventoryNaturalGasMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesInventoryNaturalGasMember_lbl" xml:lang="en-US" id="id_8501307_1335459_1_1">Public Utilities, Inventory, Natural Gas [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesInventoryNaturalGasMember_lbl" xml:lang="en-US" id="id_8501307_1335459_2_1">Natural Gas</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesInventoryNaturalGasMember" xlink:to="us-gaap_PublicUtilitiesInventoryNaturalGasMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesInventoryPropaneMember" xlink:label="us-gaap_PublicUtilitiesInventoryPropaneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesInventoryPropaneMember_lbl" xml:lang="en-US" id="id_8501307_1332266_1_1">Propane [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesInventoryPropaneMember_lbl" xml:lang="en-US" id="id_8501307_1332266_2_1">Propane</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesInventoryPropaneMember" xlink:to="us-gaap_PublicUtilitiesInventoryPropaneMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesInventoryTable" xlink:label="us-gaap_PublicUtilitiesInventoryTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesInventoryTable_lbl" xml:lang="en-US" id="id_8501307_1335460_1_1">Public Utilities, Inventory [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesInventoryTable_lbl" xml:lang="en-US" id="id_8501307_1335460_2_1">Public Utilities, Inventory [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesInventoryTable" xlink:to="us-gaap_PublicUtilitiesInventoryTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain" xlink:label="us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesInventoryTypeDomain_lbl" xml:lang="en-US" id="id_8501307_1335461_1_1">Inventory [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesInventoryTypeDomain_lbl" xml:lang="en-US" id="id_8501307_1335461_2_1">Inventory [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesInventoryTypeDomain" xlink:to="us-gaap_PublicUtilitiesInventoryTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesPolicyTextBlock" xlink:label="us-gaap_PublicUtilitiesPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1329134_1_1">Public Utilities, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1329134_2_1">Regulatory Accounting</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesPolicyTextBlock" xlink:to="us-gaap_PublicUtilitiesPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAbstract" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAbstract_lbl" xml:lang="en-US" id="id_8501307_1335463_1_1">Public Utilities, Property, Plant and Equipment [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAbstract_lbl" xml:lang="en-US" id="id_8501307_1335463_2_1">Utility Plant:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAbstract" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_lbl" xml:lang="en-US" id="id_8501307_1336831_1_1">Public Utilities, Property, Plant and Equipment, Accumulated Depreciation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_lbl" xml:lang="en-US" id="id_8501307_1336831_2_1">Less: Accumulated Depreciation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentCommon" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentCommon"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentCommon_lbl" xml:lang="en-US" id="id_8501307_1343776_1_1">Public Utilities, Property, Plant and Equipment, Common</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentCommon_lbl" xml:lang="en-US" id="id_8501307_1343776_2_1">Common</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentCommon" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentCommon_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_lbl" xml:lang="en-US" id="id_8501307_1342819_1_1">Public Utilities, Property, Plant and Equipment, Construction Work in Progress</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_lbl" xml:lang="en-US" id="id_8501307_1342819_2_1">Construction Work in Progress</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_PublicUtilitiesPropertyPlantAndEquipmentGas" xlink:label="utl_PublicUtilitiesPropertyPlantAndEquipmentGas"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_PublicUtilitiesPropertyPlantAndEquipmentGas_lbl" xml:lang="en-US" id="id_8501307_1494524_3_1">Public Utilities Property Plant and Equipment related to Gas Operations.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_PublicUtilitiesPropertyPlantAndEquipmentGas_lbl" xml:lang="en-US" id="id_8501307_1494524_1_1">Public Utilities Property Plant And Equipment Gas</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_PublicUtilitiesPropertyPlantAndEquipmentGas_lbl" xml:lang="en-US" id="id_8501307_1494524_2_1">Gas</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_PublicUtilitiesPropertyPlantAndEquipmentGas" xlink:to="utl_PublicUtilitiesPropertyPlantAndEquipmentGas_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_lbl" xml:lang="en-US" id="id_8501307_1341788_1_1">Public Utilities, Property, Plant and Equipment, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_lbl" xml:lang="en-US" id="id_8501307_1341788_6_1">Net Utility Plant</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_lbl" xml:lang="en-US" id="id_8501307_1343785_1_1">Public Utilities, Property, Plant and Equipment, Plant in Service</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_lbl" xml:lang="en-US" id="id_8501307_1343785_6_1">Total Utility Plant</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution_lbl" xml:lang="en-US" id="id_8501307_1341792_1_1">Public Utilities, Property, Plant and Equipment, Transmission and Distribution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution_lbl" xml:lang="en-US" id="id_8501307_1341792_2_1">Electric</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution" xlink:to="us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmissionAndDistribution_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilityAxis" xlink:label="us-gaap_PublicUtilityAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilityAxis_lbl" xml:lang="en-US" id="id_8501307_1332277_1_1">Public Utility [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilityAxis_lbl" xml:lang="en-US" id="id_8501307_1332277_2_1">Public Utility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilityAxis" xlink:to="us-gaap_PublicUtilityAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:label="us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis_lbl" xml:lang="en-US" id="id_8501307_1332278_1_1">Regulation Status [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis_lbl" xml:lang="en-US" id="id_8501307_1332278_2_1">Regulation Status [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis" xlink:to="us-gaap_PublicUtilityRegulatedOrUnregulatedStatusAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="us-gaap_RangeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RangeAxis_lbl" xml:lang="en-US" id="id_8501307_1335482_1_1">Range [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RangeAxis_lbl" xml:lang="en-US" id="id_8501307_1335482_2_1">Range</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RangeAxis" xlink:to="us-gaap_RangeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="us-gaap_RangeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RangeMember_lbl" xml:lang="en-US" id="id_8501307_1325933_1_1">Range [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RangeMember_lbl" xml:lang="en-US" id="id_8501307_1325933_2_1">Range [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RangeMember" xlink:to="us-gaap_RangeMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReceivablesAbstract" xlink:label="us-gaap_ReceivablesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReceivablesAbstract_lbl" xml:lang="en-US" id="id_8501307_1329183_1_1">Receivables [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReceivablesAbstract_lbl" xml:lang="en-US" id="id_8501307_1329183_2_1">Receivables [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReceivablesAbstract" xlink:to="us-gaap_ReceivablesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReceivablesBillingStatusDomain" xlink:label="us-gaap_ReceivablesBillingStatusDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReceivablesBillingStatusDomain_lbl" xml:lang="en-US" id="id_8501307_1335508_1_1">Receivables Billing Status [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReceivablesBillingStatusDomain_lbl" xml:lang="en-US" id="id_8501307_1335508_2_1">Receivables Billing Status [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReceivablesBillingStatusDomain" xlink:to="us-gaap_ReceivablesBillingStatusDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ReceivablesLineItems" xlink:label="utl_ReceivablesLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ReceivablesLineItems_lbl" xml:lang="en-US" id="id_8501307_1392296_3_1">Line items represent receivables.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ReceivablesLineItems_lbl" xml:lang="en-US" id="id_8501307_1392296_1_1">Receivables [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ReceivablesLineItems_lbl" xml:lang="en-US" id="id_8501307_1392296_2_1">Receivables [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ReceivablesLineItems" xlink:to="utl_ReceivablesLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReceivablesPolicyTextBlock" xlink:label="us-gaap_ReceivablesPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReceivablesPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1332308_1_1">Receivables, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReceivablesPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1332308_2_1">Exchange Gas Receivable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReceivablesPolicyTextBlock" xlink:to="us-gaap_ReceivablesPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ReceivablesTable" xlink:label="utl_ReceivablesTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ReceivablesTable_lbl" xml:lang="en-US" id="id_8501307_1499895_3_1">Schedule reflecting Receivables.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ReceivablesTable_lbl" xml:lang="en-US" id="id_8501307_1499895_1_1">Receivables [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ReceivablesTable_lbl" xml:lang="en-US" id="id_8501307_1499895_2_1">Receivables [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ReceivablesTable" xlink:to="utl_ReceivablesTable_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_RecentlyIssuedAccountingPronouncementsPolicyTextBlock" xlink:label="utl_RecentlyIssuedAccountingPronouncementsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_RecentlyIssuedAccountingPronouncementsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1444118_3_1">Recently Issued Accounting Pronouncements, Policy.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_RecentlyIssuedAccountingPronouncementsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1444118_1_1">Recently Issued Accounting Pronouncements [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_RecentlyIssuedAccountingPronouncementsPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1444118_2_1">Recently Issued Pronouncements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_RecentlyIssuedAccountingPronouncementsPolicyTextBlock" xlink:to="utl_RecentlyIssuedAccountingPronouncementsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_lbl" xml:lang="en-US" id="id_8501307_1332313_1_1">Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_lbl" xml:lang="en-US" id="id_8501307_1332313_2_1">Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:to="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegistrationPaymentArrangementTerm" xlink:label="us-gaap_RegistrationPaymentArrangementTerm"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegistrationPaymentArrangementTerm_lbl" xml:lang="en-US" id="id_8501307_1325990_1_1">Registration Payment Arrangement, Term</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegistrationPaymentArrangementTerm_lbl" xml:lang="en-US" id="id_8501307_1325990_2_1">TIRA initial term</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegistrationPaymentArrangementTerm" xlink:to="us-gaap_RegistrationPaymentArrangementTerm_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue" xlink:label="us-gaap_RegulatedAndUnregulatedOperatingRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatedAndUnregulatedOperatingRevenue_lbl" xml:lang="en-US" id="id_8501307_1336814_1_1">Regulated and Unregulated Operating Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatedAndUnregulatedOperatingRevenue_lbl" xml:lang="en-US" id="id_8501307_1336814_2_1">Revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_RegulatedAndUnregulatedOperatingRevenue_lbl" xml:lang="en-US" id="id_8501307_1336814_6_1">Total Operating Revenues</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatedAndUnregulatedOperatingRevenue" xlink:to="us-gaap_RegulatedAndUnregulatedOperatingRevenue_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatedAndUnregulatedOperationDomain" xlink:label="us-gaap_RegulatedAndUnregulatedOperationDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatedAndUnregulatedOperationDomain_lbl" xml:lang="en-US" id="id_8501307_1335533_1_1">Regulated and Unregulated Operation [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatedAndUnregulatedOperationDomain_lbl" xml:lang="en-US" id="id_8501307_1335533_2_1">Regulated and Unregulated Operation [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatedAndUnregulatedOperationDomain" xlink:to="us-gaap_RegulatedAndUnregulatedOperationDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatedOperatingRevenueElectricNonNuclear" xlink:label="us-gaap_RegulatedOperatingRevenueElectricNonNuclear"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatedOperatingRevenueElectricNonNuclear_lbl" xml:lang="en-US" id="id_8501307_1339386_1_1">Regulated Operating Revenue, Electric, Non-Nuclear</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatedOperatingRevenueElectricNonNuclear_lbl" xml:lang="en-US" id="id_8501307_1339386_2_1">Electric</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatedOperatingRevenueElectricNonNuclear" xlink:to="us-gaap_RegulatedOperatingRevenueElectricNonNuclear_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatedOperatingRevenueGas" xlink:label="us-gaap_RegulatedOperatingRevenueGas"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatedOperatingRevenueGas_lbl" xml:lang="en-US" id="id_8501307_1338484_1_1">Regulated Operating Revenue, Gas</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatedOperatingRevenueGas_lbl" xml:lang="en-US" id="id_8501307_1338484_2_1">Gas</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatedOperatingRevenueGas" xlink:to="us-gaap_RegulatedOperatingRevenueGas_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatedOperationsAbstract" xlink:label="us-gaap_RegulatedOperationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatedOperationsAbstract_lbl" xml:lang="en-US" id="id_8501307_1332344_1_1">Regulated Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatedOperationsAbstract_lbl" xml:lang="en-US" id="id_8501307_1332344_2_1">Regulated Operations [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatedOperationsAbstract" xlink:to="us-gaap_RegulatedOperationsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryAssetAxis" xlink:label="us-gaap_RegulatoryAssetAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryAssetAxis_lbl" xml:lang="en-US" id="id_8501307_1329213_1_1">Regulatory Asset [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryAssetAxis_lbl" xml:lang="en-US" id="id_8501307_1329213_2_1">Regulatory Asset</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryAssetAxis" xlink:to="us-gaap_RegulatoryAssetAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryAssetDomain" xlink:label="us-gaap_RegulatoryAssetDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryAssetDomain_lbl" xml:lang="en-US" id="id_8501307_1325984_1_1">Regulatory Asset [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryAssetDomain_lbl" xml:lang="en-US" id="id_8501307_1325984_2_1">Regulatory Asset [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryAssetDomain" xlink:to="us-gaap_RegulatoryAssetDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryAssetLineItems" xlink:label="us-gaap_RegulatoryAssetLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryAssetLineItems_lbl" xml:lang="en-US" id="id_8501307_1332329_1_1">Regulatory Assets [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryAssetLineItems_lbl" xml:lang="en-US" id="id_8501307_1332329_2_1">Regulatory Assets [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryAssetLineItems" xlink:to="us-gaap_RegulatoryAssetLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_RegulatoryAssetMember" xlink:label="utl_RegulatoryAssetMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_RegulatoryAssetMember_lbl" xml:lang="en-US" id="id_8501307_1475947_3_1">Regulatory Asset [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_RegulatoryAssetMember_lbl" xml:lang="en-US" id="id_8501307_1475947_1_1">Regulatory Asset [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_RegulatoryAssetMember_lbl" xml:lang="en-US" id="id_8501307_1475947_2_1">Regulatory Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_RegulatoryAssetMember" xlink:to="utl_RegulatoryAssetMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryAssets" xlink:label="us-gaap_RegulatoryAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryAssets_lbl" xml:lang="en-US" id="id_8501307_1340901_1_1">Regulatory Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryAssets_lbl" xml:lang="en-US" id="id_8501307_1340901_2_1">Regulatory Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryAssets" xlink:to="us-gaap_RegulatoryAssets_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="us-gaap_RegulatoryAssetsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryAssetsCurrent_lbl" xml:lang="en-US" id="id_8501307_1341871_1_1">Regulatory Assets, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryAssetsCurrent_lbl" xml:lang="en-US" id="id_8501307_1341871_2_1">Less: Current Portion of Regulatory Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryAssetsCurrent" xlink:to="us-gaap_RegulatoryAssetsCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="us-gaap_RegulatoryAssetsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryAssetsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1340902_1_1">Regulatory Assets, Noncurrent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryAssetsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1340902_2_1">Regulatory Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RegulatoryAssetsNoncurrent_lbl" xml:lang="en-US" id="id_8501307_1340902_12_1">Regulatory Assets - noncurrent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryAssetsNoncurrent" xlink:to="us-gaap_RegulatoryAssetsNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryLiabilities" xlink:label="us-gaap_RegulatoryLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryLiabilities_lbl" xml:lang="en-US" id="id_8501307_1336812_1_1">Regulatory Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryLiabilities_lbl" xml:lang="en-US" id="id_8501307_1336812_2_1">Regulatory Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryLiabilities" xlink:to="us-gaap_RegulatoryLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryLiabilitiesLineItems" xlink:label="us-gaap_RegulatoryLiabilitiesLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryLiabilitiesLineItems_lbl" xml:lang="en-US" id="id_8501307_1335548_1_1">Regulatory Liabilities [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryLiabilitiesLineItems_lbl" xml:lang="en-US" id="id_8501307_1335548_2_1">Regulatory Liabilities [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryLiabilitiesLineItems" xlink:to="us-gaap_RegulatoryLiabilitiesLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryLiabilityAxis" xlink:label="us-gaap_RegulatoryLiabilityAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryLiabilityAxis_lbl" xml:lang="en-US" id="id_8501307_1332335_1_1">Regulatory Liability [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryLiabilityAxis_lbl" xml:lang="en-US" id="id_8501307_1332335_2_1">Regulatory Liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryLiabilityAxis" xlink:to="us-gaap_RegulatoryLiabilityAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent" xlink:label="us-gaap_RegulatoryLiabilityCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RegulatoryLiabilityCurrent_lbl" xml:lang="en-US" id="id_8501307_1339384_1_1">Regulatory Liability, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel" xlink:label="us-gaap_RegulatoryLiabilityCurrent_lbl" xml:lang="en-US" id="id_8501307_1339384_32_1">Regulatory Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RegulatoryLiabilityCurrent_lbl" xml:lang="en-US" id="id_8501307_1339384_2_1">Current Portion of Regulatory Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RegulatoryLiabilityCurrent_lbl" xml:lang="en-US" id="id_8501307_1339384_12_1">Less: Current Portion of Regulatory Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RegulatoryLiabilityCurrent" xlink:to="us-gaap_RegulatoryLiabilityCurrent_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RegulatoryLiabilityDomain" xlink:label="us-gaap_RegulatoryLiabilityDomain"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLinesOfCredit" xlink:to="us-gaap_RepaymentsOfLinesOfCredit_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReserveQuantitiesByTypeOfReserveAxis_lbl" xml:lang="en-US" id="id_8501307_1326016_1_1">Petroleum Reserves [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReserveQuantitiesByTypeOfReserveAxis_lbl" xml:lang="en-US" id="id_8501307_1326016_2_1">Petroleum Reserves [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReserveQuantitiesByTypeOfReserveAxis" xlink:to="us-gaap_ReserveQuantitiesByTypeOfReserveAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestrictedStockExpense" xlink:label="us-gaap_RestrictedStockExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedStockExpense_lbl" xml:lang="en-US" id="id_8501307_1341891_1_1">Restricted Stock or Unit Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedStockExpense_lbl" xml:lang="en-US" id="id_8501307_1341891_2_1">Share based compensation expense</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedStockMember_lbl" xml:lang="en-US" id="id_8501307_1332392_1_1">Restricted Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedStockMember_lbl" xml:lang="en-US" id="id_8501307_1332392_2_1">Restricted Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockMember" xlink:to="us-gaap_RestrictedStockMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US" id="id_8501307_1326044_2_1">Retained Earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_RevenueRequirementReconciledRatesEffectiveDate_lbl" xml:lang="en-US" id="id_8501307_1529577_3_1">Revenue Requirement Reconciled Rates Effective Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_RevenueRequirementReconciledRatesEffectiveDate_lbl" xml:lang="en-US" id="id_8501307_1529577_1_1">Revenue Requirement Reconciled Rates Effective Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_RevenueRequirementReconciledRatesEffectiveDate_lbl" xml:lang="en-US" id="id_8501307_1529577_2_1">Revenue requirement reconciled rates effective date</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xml:lang="en-US" id="id_8501307_1326078_2_1">Revolving Credit Facility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevolvingCreditFacilityMember" xlink:to="us-gaap_RevolvingCreditFacilityMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xml:lang="en-US" id="id_8501307_1326203_1_1">Sale of Stock [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xml:lang="en-US" id="id_8501307_1326203_2_1">Sale of Stock [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="us-gaap_ScenarioForecastMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScenarioForecastMember_lbl" xml:lang="en-US" id="id_8501307_1326102_1_1">Scenario, Forecast [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScenarioForecastMember_lbl" xml:lang="en-US" id="id_8501307_1326102_2_1">Scenario Forecast</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScenarioUnspecifiedDomain_lbl" xml:lang="en-US" id="id_8501307_1329317_2_1">Scenario, Unspecified [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1329322_2_1">Key Weighted Average Assumptions used in Determining Benefit Plan Costs and Obligations</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ScheduleOfOtherAccountsReceivableTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1398661_3_1">Description of the components and amounts included in Exchange Gas Receivable.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfRegulatoryAssetsTable_lbl" xml:lang="en-US" id="id_8501307_1326172_2_1">Schedule of Regulatory Assets [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRegulatoryAssetsTable" xlink:to="us-gaap_ScheduleOfRegulatoryAssetsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRegulatoryAssetsTextBlock_lbl" xml:lang="en-US" id="id_8501307_1329910_1_1">Schedule of Regulatory Assets [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfRegulatoryAssetsTextBlock_lbl" xml:lang="en-US" id="id_8501307_1329910_2_1">Regulatory Assets</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRegulatoryLiabilitiesTable_lbl" xml:lang="en-US" id="id_8501307_1335725_1_1">Schedule of Regulatory Liabilities [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfRegulatoryLiabilitiesTable_lbl" xml:lang="en-US" id="id_8501307_1335725_2_1">Schedule of Regulatory Liabilities [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRegulatoryLiabilitiesTable" xlink:to="us-gaap_ScheduleOfRegulatoryLiabilitiesTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRegulatoryLiabilitiesTextBlock_lbl" xml:lang="en-US" id="id_8501307_1333076_1_1">Schedule of Regulatory Liabilities [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfRegulatoryLiabilitiesTextBlock_lbl" xml:lang="en-US" id="id_8501307_1333076_2_1">Regulatory Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRegulatoryLiabilitiesTextBlock" xlink:to="us-gaap_ScheduleOfRegulatoryLiabilitiesTextBlock_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xml:lang="en-US" id="id_8501307_1333085_1_1">Schedule of Segment Reporting Information, by Segment [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xml:lang="en-US" id="id_8501307_1333085_2_1">Significant Segment Financial Data</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xml:lang="en-US" id="id_8501307_1326191_1_1">Schedule of Stock by Class [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xml:lang="en-US" id="id_8501307_1326191_2_1">Schedule of Stock by Class [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ScheduleOfStockByClassTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ScheduleOfStockOptionsLineItems_lbl" xml:lang="en-US" id="id_8501307_1459758_3_1">Schedule Of Stock Options [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ScheduleOfStockOptionsLineItems_lbl" xml:lang="en-US" id="id_8501307_1459758_1_1">Schedule Of Stock Options [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ScheduleOfStockOptionsLineItems_lbl" xml:lang="en-US" id="id_8501307_1459758_2_1">Schedule Of Stock Options [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ScheduleOfStockOptionsLineItems" xlink:to="utl_ScheduleOfStockOptionsLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ScheduleOfStockOptionsTable_lbl" xml:lang="en-US" id="id_8501307_1464958_3_1">Schedule Of Stock Options [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ScheduleOfStockOptionsTable_lbl" xml:lang="en-US" id="id_8501307_1464958_1_1">Schedule Of Stock Options [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ScheduleOfStockOptionsTable_lbl" xml:lang="en-US" id="id_8501307_1464958_2_1">Schedule Of Stock Options [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ScheduleOfStockOptionsTable" xlink:to="utl_ScheduleOfStockOptionsTable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock" xlink:label="us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1335742_1_1">Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock" xlink:to="us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfUtilityInventoryTextBlock" xlink:label="us-gaap_ScheduleOfUtilityInventoryTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfUtilityInventoryTextBlock_lbl" xml:lang="en-US" id="id_8501307_1326196_1_1">Schedule of Utility Inventory [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfUtilityInventoryTextBlock_lbl" xml:lang="en-US" id="id_8501307_1326196_2_1">Components of Gas Inventory</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfUtilityInventoryTextBlock" xlink:to="us-gaap_ScheduleOfUtilityInventoryTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SecuredDebt" xlink:label="us-gaap_SecuredDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SecuredDebt_lbl" xml:lang="en-US" id="id_8501307_1337605_1_1">Secured Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SecuredDebt_lbl" xml:lang="en-US" id="id_8501307_1337605_2_1">Senior Secured Notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuredDebt" xlink:to="us-gaap_SecuredDebt_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentDomain_lbl" xml:lang="en-US" id="id_8501307_1326222_1_1">Segments [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentDomain_lbl" xml:lang="en-US" id="id_8501307_1326222_2_1">Segments [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentDomain" xlink:to="us-gaap_SegmentDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="us-gaap_SegmentGeographicalDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentGeographicalDomain_lbl" xml:lang="en-US" id="id_8501307_1335783_1_1">Geographical [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentGeographicalDomain_lbl" xml:lang="en-US" id="id_8501307_1335783_2_1">Geographical [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="us-gaap_SegmentGeographicalDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xml:lang="en-US" id="id_8501307_1326223_1_1">Segment Reporting [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xml:lang="en-US" id="id_8501307_1326223_2_1">Segment Reporting [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_SegmentReportingAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xml:lang="en-US" id="id_8501307_1335787_1_1">Segment Reporting Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xml:lang="en-US" id="id_8501307_1335787_2_1">SEGMENT INFORMATION</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:label="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_lbl" xml:lang="en-US" id="id_8501307_1329967_1_1">Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_lbl" xml:lang="en-US" id="id_8501307_1329967_2_1">Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:to="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SeniorNotes" xlink:label="us-gaap_SeniorNotes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeniorNotes_lbl" xml:lang="en-US" id="id_8501307_1339316_1_1">Senior Notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SeniorNotes_lbl" xml:lang="en-US" id="id_8501307_1339316_2_1">Senior Notes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeniorNotes" xlink:to="us-gaap_SeniorNotes_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeniorNotesFivePointTwoNinePercentDueMarchTwoTwentyTwentyMember" xlink:label="utl_SeniorNotesFivePointTwoNinePercentDueMarchTwoTwentyTwentyMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeniorNotesFivePointTwoNinePercentDueMarchTwoTwentyTwentyMember_lbl" xml:lang="en-US" id="id_8501307_1384734_3_1">Senior Notes Five Point Two Nine Percent Due March Two Twenty Twenty [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeniorNotesFivePointTwoNinePercentDueMarchTwoTwentyTwentyMember_lbl" xml:lang="en-US" id="id_8501307_1384734_1_1">Senior Notes Five Point Two Nine Percent Due March Two Twenty Twenty [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeniorNotesFivePointTwoNinePercentDueMarchTwoTwentyTwentyMember_lbl" xml:lang="en-US" id="id_8501307_1384734_2_1">5.29% Senior Notes, Due March 2, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeniorNotesFivePointTwoNinePercentDueMarchTwoTwentyTwentyMember" xlink:to="utl_SeniorNotesFivePointTwoNinePercentDueMarchTwoTwentyTwentyMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeniorNotesFourPointFourTwoPercentDueOctoberFifteenTwentyFortyFourMember" xlink:label="utl_SeniorNotesFourPointFourTwoPercentDueOctoberFifteenTwentyFortyFourMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeniorNotesFourPointFourTwoPercentDueOctoberFifteenTwentyFortyFourMember_lbl" xml:lang="en-US" id="id_8501307_1505415_3_1">Senior Notes Four Point Four Two Percent Due October Fifteen Twenty Forty Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeniorNotesFourPointFourTwoPercentDueOctoberFifteenTwentyFortyFourMember_lbl" xml:lang="en-US" id="id_8501307_1505415_1_1">Senior Notes Four Point Four Two Percent Due October Fifteen Twenty Forty Four [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeniorNotesFourPointFourTwoPercentDueOctoberFifteenTwentyFortyFourMember_lbl" xml:lang="en-US" id="id_8501307_1505415_2_1">4.42% Senior Notes, Due October 15, 2044</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeniorNotesFourPointFourTwoPercentDueOctoberFifteenTwentyFortyFourMember" xlink:to="utl_SeniorNotesFourPointFourTwoPercentDueOctoberFifteenTwentyFortyFourMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeniorNotesSevenPointOneFivePercentDueDecemberFifteenTwentyEighteenMember" xlink:label="utl_SeniorNotesSevenPointOneFivePercentDueDecemberFifteenTwentyEighteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeniorNotesSevenPointOneFivePercentDueDecemberFifteenTwentyEighteenMember_lbl" xml:lang="en-US" id="id_8501307_1369068_3_1">Senior Notes Seven Point One Five Percent Due December Fifteen Twenty Eighteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeniorNotesSevenPointOneFivePercentDueDecemberFifteenTwentyEighteenMember_lbl" xml:lang="en-US" id="id_8501307_1369068_1_1">Senior Notes Seven Point One Five Percent Due December Fifteen Twenty Eighteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeniorNotesSevenPointOneFivePercentDueDecemberFifteenTwentyEighteenMember_lbl" xml:lang="en-US" id="id_8501307_1369068_2_1">7.15% Senior Notes, Due December 15, 2018</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeniorNotesSevenPointOneFivePercentDueDecemberFifteenTwentyEighteenMember" xlink:to="utl_SeniorNotesSevenPointOneFivePercentDueDecemberFifteenTwentyEighteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeniorNotesSevenPointSevenTwoPercentDueDecemberThreeTwentyThirtyEightMember" xlink:label="utl_SeniorNotesSevenPointSevenTwoPercentDueDecemberThreeTwentyThirtyEightMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeniorNotesSevenPointSevenTwoPercentDueDecemberThreeTwentyThirtyEightMember_lbl" xml:lang="en-US" id="id_8501307_1391945_3_1">Senior Notes Seven Point Seven Two Percent Due December Three Twenty Thirty Eight [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeniorNotesSevenPointSevenTwoPercentDueDecemberThreeTwentyThirtyEightMember_lbl" xml:lang="en-US" id="id_8501307_1391945_1_1">Senior Notes Seven Point Seven Two Percent Due December Three Twenty Thirty Eight [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeniorNotesSevenPointSevenTwoPercentDueDecemberThreeTwentyThirtyEightMember_lbl" xml:lang="en-US" id="id_8501307_1391945_2_1">7.72% Senior Notes, Series B, Due December 3, 2038</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeniorNotesSevenPointSevenTwoPercentDueDecemberThreeTwentyThirtyEightMember" xlink:to="utl_SeniorNotesSevenPointSevenTwoPercentDueDecemberThreeTwentyThirtyEightMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeniorNotesSixPointNineFivePercentDueDecemberThreeTwentyEighteenMember" xlink:label="utl_SeniorNotesSixPointNineFivePercentDueDecemberThreeTwentyEighteenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeniorNotesSixPointNineFivePercentDueDecemberThreeTwentyEighteenMember_lbl" xml:lang="en-US" id="id_8501307_1492989_3_1">Senior Notes Six Point Nine Five Percent Due December Three Twenty Eighteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeniorNotesSixPointNineFivePercentDueDecemberThreeTwentyEighteenMember_lbl" xml:lang="en-US" id="id_8501307_1492989_1_1">Senior Notes Six Point Nine Five Percent Due December Three Twenty Eighteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeniorNotesSixPointNineFivePercentDueDecemberThreeTwentyEighteenMember_lbl" xml:lang="en-US" id="id_8501307_1492989_2_1">6.95% Senior Notes, Series A, Due December 3, 2018</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeniorNotesSixPointNineFivePercentDueDecemberThreeTwentyEighteenMember" xlink:to="utl_SeniorNotesSixPointNineFivePercentDueDecemberThreeTwentyEighteenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeniorNotesSixPointThreeThreePercentDueMayOneTwentyTwentyTwoMember" xlink:label="utl_SeniorNotesSixPointThreeThreePercentDueMayOneTwentyTwentyTwoMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeniorNotesSixPointThreeThreePercentDueMayOneTwentyTwentyTwoMember_lbl" xml:lang="en-US" id="id_8501307_1497352_3_1">Senior Notes Six Point Three Three Percent Due May One Twenty Twenty Two [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeniorNotesSixPointThreeThreePercentDueMayOneTwentyTwentyTwoMember_lbl" xml:lang="en-US" id="id_8501307_1497352_1_1">Senior Notes Six Point Three Three Percent Due May One Twenty Twenty Two [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeniorNotesSixPointThreeThreePercentDueMayOneTwentyTwentyTwoMember_lbl" xml:lang="en-US" id="id_8501307_1497352_2_1">6.33% Notes, Due May 1, 2022</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeniorNotesSixPointThreeThreePercentDueMayOneTwentyTwentyTwoMember" xlink:to="utl_SeniorNotesSixPointThreeThreePercentDueMayOneTwentyTwentyTwoMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeniorNotesThreePointSevenZeroPercentDueAugustOneTwentyTwentySixMember" xlink:label="utl_SeniorNotesThreePointSevenZeroPercentDueAugustOneTwentyTwentySixMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeniorNotesThreePointSevenZeroPercentDueAugustOneTwentyTwentySixMember_lbl" xml:lang="en-US" id="id_8501307_1534850_3_1">Senior Notes Three Point Seven Zero Percent Due August One Twenty Twenty Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeniorNotesThreePointSevenZeroPercentDueAugustOneTwentyTwentySixMember_lbl" xml:lang="en-US" id="id_8501307_1534850_1_1">Senior Notes Three Point Seven Zero Percent Due August One Twenty Twenty Six [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeniorNotesThreePointSevenZeroPercentDueAugustOneTwentyTwentySixMember_lbl" xml:lang="en-US" id="id_8501307_1534850_2_1">3.70% Notes, Due August 1, 2026</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeniorNotesThreePointSevenZeroPercentDueAugustOneTwentyTwentySixMember" xlink:to="utl_SeniorNotesThreePointSevenZeroPercentDueAugustOneTwentyTwentySixMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeniorSecuredNotesEightPointZeroZeroPercentDueThroughAugustOneTwentySeventeenMember" xlink:label="utl_SeniorSecuredNotesEightPointZeroZeroPercentDueThroughAugustOneTwentySeventeenMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeniorSecuredNotesEightPointZeroZeroPercentDueThroughAugustOneTwentySeventeenMember_lbl" xml:lang="en-US" id="id_8501307_1373531_3_1">Senior Secured Notes Eight Point Zero Zero Percent Due Through August One Twenty Seventeen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeniorSecuredNotesEightPointZeroZeroPercentDueThroughAugustOneTwentySeventeenMember_lbl" xml:lang="en-US" id="id_8501307_1373531_1_1">Senior Secured Notes Eight Point Zero Zero Percent Due Through August One Twenty Seventeen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeniorSecuredNotesEightPointZeroZeroPercentDueThroughAugustOneTwentySeventeenMember_lbl" xml:lang="en-US" id="id_8501307_1373531_2_1">8.00% Senior Secured Notes, Due August 1, 2017</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeniorSecuredNotesEightPointZeroZeroPercentDueThroughAugustOneTwentySeventeenMember" xlink:to="utl_SeniorSecuredNotesEightPointZeroZeroPercentDueThroughAugustOneTwentySeventeenMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SeriesSixMember" xlink:label="utl_SeriesSixMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SeriesSixMember_lbl" xml:lang="en-US" id="id_8501307_1444823_3_1">Series 6 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SeriesSixMember_lbl" xml:lang="en-US" id="id_8501307_1444823_1_1">Series 6 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SeriesSixMember_lbl" xml:lang="en-US" id="id_8501307_1444823_2_1">Series 6</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SeriesSixMember" xlink:to="utl_SeriesSixMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SettlementDates" xlink:label="utl_SettlementDates"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SettlementDates_lbl" xml:lang="en-US" id="id_8501307_1412847_3_1">Settlement Dates.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SettlementDates_lbl" xml:lang="en-US" id="id_8501307_1412847_1_1">Settlement Dates</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SettlementDates_lbl" xml:lang="en-US" id="id_8501307_1412847_2_1">Date to receive a refund as one-time lump sum payment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SettlementDates" xlink:to="utl_SettlementDates_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xml:lang="en-US" id="id_8501307_1335813_1_1">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xml:lang="en-US" id="id_8501307_1335813_2_1">Restricted stock vesting period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xml:lang="en-US" id="id_8501307_1333154_1_1">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl" xml:lang="en-US" id="id_8501307_1333154_2_1">Restricted stock vesting percentage annually</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested_lbl" xml:lang="en-US" id="id_8501307_1341930_1_1">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested_lbl" xml:lang="en-US" id="id_8501307_1341930_2_1">Aggregate Market Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US" id="id_8501307_1462154_3_1">Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Fully Vested Grants in Period, Weighted Average Grant Date Fair Value.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US" id="id_8501307_1462154_1_1">Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options,Fully Vested Grants in Period, Weighted Average Grant Date Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US" id="id_8501307_1462154_2_1">Restricted Stock Units Granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedGrantsInPeriodWeightedAverageGrantDateFairValue_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedNumber" xlink:label="utl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedNumber"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedNumber_lbl" xml:lang="en-US" id="id_8501307_1454469_3_1">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Fully Vested, Number</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedNumber_lbl" xml:lang="en-US" id="id_8501307_1454469_1_1">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Fully Vested, Number</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="utl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedNumber_lbl" xml:lang="en-US" id="id_8501307_1454469_4_1">Ending Restricted Stock Units</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="utl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedNumber_lbl" xml:lang="en-US" id="id_8501307_1454469_5_1">Beginning Restricted Stock Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedNumber" xlink:to="utl_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedNumber_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedSettled" xlink:label="utl_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFullyVestedSettled"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US" id="id_8501307_1401236_3_1">Significant Accounting Policies [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US" id="id_8501307_1401236_1_1">Significant Accounting Policies [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US" id="id_8501307_1401236_2_1">Significant Accounting Policies [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SignificantAccountingPoliciesLineItems" xlink:to="utl_SignificantAccountingPoliciesLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SignificantAccountingPoliciesTable_lbl" xml:lang="en-US" id="id_8501307_1391952_3_1">Significant Accounting Policies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SignificantAccountingPoliciesTable_lbl" xml:lang="en-US" id="id_8501307_1391952_1_1">Significant Accounting Policies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SignificantAccountingPoliciesTable_lbl" xml:lang="en-US" id="id_8501307_1391952_2_1">Significant Accounting Policies [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SignificantAccountingPoliciesTable" xlink:to="utl_SignificantAccountingPoliciesTable_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SiteContingencyLineItems" xlink:to="us-gaap_SiteContingencyLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SiteContingencyTable_lbl" xml:lang="en-US" id="id_8501307_1326893_1_1">Site Contingency [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SiteContingencyTable_lbl" xml:lang="en-US" id="id_8501307_1326893_2_1">Site Contingency [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SiteContingencyTable" xlink:to="us-gaap_SiteContingencyTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SolarMember_lbl" xml:lang="en-US" id="id_8501307_1444998_1_1">Solar [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SolarMember_lbl" xml:lang="en-US" id="id_8501307_1444998_2_1">Fitchburg-Solar Generation</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xml:lang="en-US" id="id_8501307_1330100_2_1">Statement of Stockholders' Equity [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xml:lang="en-US" id="id_8501307_1339288_2_1">Issuance of Common Shares, Value</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xml:lang="en-US" id="id_8501307_1337575_1_1">Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SublimitForIssuanceOfStandbyLettersOfCredit" xlink:label="utl_SublimitForIssuanceOfStandbyLettersOfCredit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SublimitForIssuanceOfStandbyLettersOfCredit_lbl" xml:lang="en-US" id="id_8501307_1504916_3_1">Sublimit For Issuance Of Standby Letters Of Credit.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SublimitForIssuanceOfStandbyLettersOfCredit_lbl" xml:lang="en-US" id="id_8501307_1504916_1_1">Sublimit For Issuance Of Standby Letters Of Credit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SublimitForIssuanceOfStandbyLettersOfCredit_lbl" xml:lang="en-US" id="id_8501307_1504916_2_1">Sublimit for the issuance of standby letters of credit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SublimitForIssuanceOfStandbyLettersOfCredit" xlink:to="utl_SublimitForIssuanceOfStandbyLettersOfCredit_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US" id="id_8501307_1330134_1_1">Subsequent Event [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US" id="id_8501307_1330134_2_1">Subsequent Event</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventsPolicyPolicyTextBlock" xlink:label="us-gaap_SubsequentEventsPolicyPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1335953_1_1">Subsequent Events, Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1335953_2_1">Subsequent Events</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsPolicyPolicyTextBlock" xlink:to="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1335955_1_1">Subsequent Event Type [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US" id="id_8501307_1335955_2_1">Subsequent Event Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US" id="id_8501307_1330136_1_1">Subsequent Event Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US" id="id_8501307_1330136_2_1">Subsequent Event Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xml:lang="en-US" id="id_8501307_1330125_1_1">Sale of Stock [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xml:lang="en-US" id="id_8501307_1330125_2_1">Sale of Stock [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xml:lang="en-US" id="id_8501307_1333299_1_1">Supplemental Cash Flow Information [Abstract]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1333300_1_1">Supplemental Employee Retirement Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_lbl" xml:lang="en-US" id="id_8501307_1333300_2_1">Supplemental Employee Retirement Plans, Defined Benefit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:to="us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_SupplyCommitmentPolicyTextBlock" xlink:label="utl_SupplyCommitmentPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_SupplyCommitmentPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1468358_3_1">Nature and amounts of items recorded as Energy Supply Obligations.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_SupplyCommitmentPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1468358_1_1">Supply Commitment Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_SupplyCommitmentPolicyTextBlock_lbl" xml:lang="en-US" id="id_8501307_1468358_2_1">Energy Supply Obligations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_SupplyCommitmentPolicyTextBlock" xlink:to="utl_SupplyCommitmentPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SupplyCommitmentTableTextBlock" xlink:label="us-gaap_SupplyCommitmentTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplyCommitmentTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1326958_1_1">Supply Commitment [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SupplyCommitmentTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1326958_2_1">Components of Current and Noncurrent Energy Supply Obligations</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TaxCreditCarryforwardAxis" xlink:label="us-gaap_TaxCreditCarryforwardAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxCreditCarryforwardAxis_lbl" xml:lang="en-US" id="id_8501307_1326974_1_1">Tax Credit Carryforward [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxCreditCarryforwardAxis_lbl" xml:lang="en-US" id="id_8501307_1326974_2_1">Tax Credit Carryforward</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxCreditCarryforwardAxis" xlink:to="us-gaap_TaxCreditCarryforwardAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_TaxCreditCarryforwardExpirationYear_lbl" xml:lang="en-US" id="id_8501307_1348702_3_1">Tax Credit Carryforward, Expiration Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_TaxCreditCarryforwardExpirationYear_lbl" xml:lang="en-US" id="id_8501307_1348702_1_1">Tax Credit Carryforward, Expiration Year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_TaxCreditCarryforwardExpirationYear_lbl" xml:lang="en-US" id="id_8501307_1348702_2_1">R&amp;D credits expiration year</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain" xlink:label="us-gaap_TaxCreditCarryforwardNameDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxCreditCarryforwardNameDomain_lbl" xml:lang="en-US" id="id_8501307_1335996_1_1">Tax Credit Carryforward, Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxCreditCarryforwardNameDomain_lbl" xml:lang="en-US" id="id_8501307_1335996_2_1">Tax Credit Carryforward, Name [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxCreditCarryforwardNameDomain" xlink:to="us-gaap_TaxCreditCarryforwardNameDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TaxesPayableCurrent" xlink:label="us-gaap_TaxesPayableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxesPayableCurrent_lbl" xml:lang="en-US" id="id_8501307_1336717_1_1">Taxes Payable, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxesPayableCurrent_lbl" xml:lang="en-US" id="id_8501307_1336717_2_1">Taxes Payable</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxPeriodAxis_lbl" xml:lang="en-US" id="id_8501307_1330161_2_1">Tax Period [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxPeriodAxis" xlink:to="us-gaap_TaxPeriodAxis_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxPeriodDomain_lbl" xml:lang="en-US" id="id_8501307_1326978_1_1">Tax Period [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxPeriodDomain_lbl" xml:lang="en-US" id="id_8501307_1326978_2_1">Tax Period [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxPeriodDomain" xlink:to="us-gaap_TaxPeriodDomain_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TaxYear2014Member" xlink:label="us-gaap_TaxYear2014Member"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxYear2014Member_lbl" xml:lang="en-US" id="id_8501307_1330165_2_1">Tax Year 2014</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_TaxYear2015Member_lbl" xml:lang="en-US" id="id_8501307_1529560_3_1">Tax Year 2015 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_TaxYear2015Member_lbl" xml:lang="en-US" id="id_8501307_1529560_1_1">Tax Year 2015 [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_TaxYear2015Member_lbl" xml:lang="en-US" id="id_8501307_1529560_2_1">Tax Year 2015</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TextBlockAbstract" xlink:label="us-gaap_TextBlockAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TextBlockAbstract_lbl" xml:lang="en-US" id="id_8501307_1336003_1_1">Text Block [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TextBlockAbstract_lbl" xml:lang="en-US" id="id_8501307_1336003_2_1">Text Block [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TextBlockAbstract" xlink:to="us-gaap_TextBlockAbstract_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_TrackerMechanismsMember" xlink:label="utl_TrackerMechanismsMember"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_TrackerMechanismsMember_lbl" xml:lang="en-US" id="id_8501307_1530686_1_1">Tracker Mechanisms [Member]</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_TwentyFourteenStepAdjustmentsMember" xlink:label="utl_TwentyFourteenStepAdjustmentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_TwentyFourteenStepAdjustmentsMember_lbl" xml:lang="en-US" id="id_8501307_1393041_3_1">Twenty Fourteen Step Adjustments [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_TwentyFourteenStepAdjustmentsMember_lbl" xml:lang="en-US" id="id_8501307_1393041_1_1">Twenty Fourteen Step Adjustments [Member]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TypeOfReserveDomain" xlink:label="us-gaap_TypeOfReserveDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TypeOfReserveDomain_lbl" xml:lang="en-US" id="id_8501307_1327037_1_1">Type of Reserve [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TypeOfRestructuringDomain_lbl" xml:lang="en-US" id="id_8501307_1333396_1_1">Type of Restructuring [Domain]</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xml:lang="en-US" id="id_8501307_1341005_1_1">Unamortized Debt Issuance Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xml:lang="en-US" id="id_8501307_1341005_2_1">Less: Unamortized Debt Issuance Costs</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_UnbilledAccountsReceivableTableTextBlock" xlink:label="utl_UnbilledAccountsReceivableTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_UnbilledAccountsReceivableTableTextBlock_lbl" xml:lang="en-US" id="id_8501307_1446019_3_1">Description of the components and amounts included in Accrued Revenue.</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnbilledContractsReceivable" xlink:label="us-gaap_UnbilledContractsReceivable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnbilledContractsReceivable_lbl" xml:lang="en-US" id="id_8501307_1341010_1_1">Unbilled Contracts Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnbilledContractsReceivable_lbl" xml:lang="en-US" id="id_8501307_1341010_2_1">Accrued Revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnbilledContractsReceivable" xlink:to="us-gaap_UnbilledContractsReceivable_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnbilledRevenuesMember" xlink:label="us-gaap_UnbilledRevenuesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnbilledRevenuesMember_lbl" xml:lang="en-US" id="id_8501307_1330246_1_1">Unbilled Revenues [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnbilledRevenuesMember_lbl" xml:lang="en-US" id="id_8501307_1330246_2_1">Unbilled Revenues</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_UncategorizedAbstract" xlink:label="utl_UncategorizedAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_UncategorizedAbstract_lbl" xml:lang="en-US" id="id_8501307_1344427_3_1">Uncategorized [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_UncategorizedAbstract_lbl" xml:lang="en-US" id="id_8501307_1344427_1_1">Uncategorized [Abstract]</label>
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    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_UnitilEnergySystemsIncMember" xlink:label="utl_UnitilEnergySystemsIncMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_UnitilEnergySystemsIncMember_lbl" xml:lang="en-US" id="id_8501307_1456075_3_1">Unitil Energy Systems Inc</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_UnitilEnergySystemsIncMember_lbl" xml:lang="en-US" id="id_8501307_1456075_1_1">Unitil Energy Systems Inc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_UnitilEnergySystemsIncMember_lbl" xml:lang="en-US" id="id_8501307_1456075_2_1">Unitil Energy Systems Inc</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_UnitilEnergySystemsIncMember" xlink:to="utl_UnitilEnergySystemsIncMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_UnitilRealtyCorpMember" xlink:label="utl_UnitilRealtyCorpMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_UnitilRealtyCorpMember_lbl" xml:lang="en-US" id="id_8501307_1417606_3_1">Unitil Realty Corp [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_UnitilRealtyCorpMember_lbl" xml:lang="en-US" id="id_8501307_1417606_1_1">Unitil Realty Corp [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_UnitilRealtyCorpMember_lbl" xml:lang="en-US" id="id_8501307_1417606_2_1">Unitil Realty Corp</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_UnitilRealtyCorpMember" xlink:to="utl_UnitilRealtyCorpMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_UnitilServiceCorpMember" xlink:label="utl_UnitilServiceCorpMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_UnitilServiceCorpMember_lbl" xml:lang="en-US" id="id_8501307_1481575_3_1">Unitil Service Corp [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_UnitilServiceCorpMember_lbl" xml:lang="en-US" id="id_8501307_1481575_1_1">Unitil Service Corp [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_UnitilServiceCorpMember_lbl" xml:lang="en-US" id="id_8501307_1481575_2_1">Unitil Service Corp.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_UnitilServiceCorpMember" xlink:to="utl_UnitilServiceCorpMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnregulatedOperationMember" xlink:label="us-gaap_UnregulatedOperationMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnregulatedOperationMember_lbl" xml:lang="en-US" id="id_8501307_1333422_1_1">Unregulated Operation [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnregulatedOperationMember_lbl" xml:lang="en-US" id="id_8501307_1333422_2_1">Unregulated Operation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnregulatedOperationMember" xlink:to="us-gaap_UnregulatedOperationMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_UsFederalResearchAndDevelopmentTaxCreditMember" xlink:label="utl_UsFederalResearchAndDevelopmentTaxCreditMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_UsFederalResearchAndDevelopmentTaxCreditMember_lbl" xml:lang="en-US" id="id_8501307_1453970_3_1">Us Federal Research and Development Tax Credit [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_UsFederalResearchAndDevelopmentTaxCreditMember_lbl" xml:lang="en-US" id="id_8501307_1453970_1_1">Us Federal Research and Development Tax Credit [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_UsFederalResearchAndDevelopmentTaxCreditMember_lbl" xml:lang="en-US" id="id_8501307_1453970_2_1">Federal Research and Development Tax Credit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_UsFederalResearchAndDevelopmentTaxCreditMember" xlink:to="utl_UsFederalResearchAndDevelopmentTaxCreditMember_lbl"/>
    <loc xlink:type="locator" xlink:href="utl-20160930.xsd#utl_UtilitiesMember" xlink:label="utl_UtilitiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="utl_UtilitiesMember_lbl" xml:lang="en-US" id="id_8501307_1376997_3_1">Utilities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="utl_UtilitiesMember_lbl" xml:lang="en-US" id="id_8501307_1376997_1_1">Utilities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="utl_UtilitiesMember_lbl" xml:lang="en-US" id="id_8501307_1376997_2_1">Utilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="utl_UtilitiesMember" xlink:to="utl_UtilitiesMember_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UtilitiesOperatingExpense" xlink:label="us-gaap_UtilitiesOperatingExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UtilitiesOperatingExpense_lbl" xml:lang="en-US" id="id_8501307_1341964_1_1">Utilities Operating Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_UtilitiesOperatingExpense_lbl" xml:lang="en-US" id="id_8501307_1341964_6_1">Total Operating Expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UtilitiesOperatingExpense" xlink:to="us-gaap_UtilitiesOperatingExpense_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization" xlink:label="us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_lbl" xml:lang="en-US" id="id_8501307_1341026_1_1">Utilities Operating Expense, Depreciation and Amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_lbl" xml:lang="en-US" id="id_8501307_1341026_2_1">Depreciation and Amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization" xlink:to="us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UtilitiesOperatingExpenseGasAndPetroleumPurchased" xlink:label="us-gaap_UtilitiesOperatingExpenseGasAndPetroleumPurchased"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UtilitiesOperatingExpenseGasAndPetroleumPurchased_lbl" xml:lang="en-US" id="id_8501307_1343929_1_1">Utilities Operating Expense, Gas and Petroleum Purchased</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UtilitiesOperatingExpenseGasAndPetroleumPurchased_lbl" xml:lang="en-US" id="id_8501307_1343929_2_1">Cost of Gas Sales</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UtilitiesOperatingExpenseGasAndPetroleumPurchased" xlink:to="us-gaap_UtilitiesOperatingExpenseGasAndPetroleumPurchased_lbl"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations" xlink:label="us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_lbl" xml:lang="en-US" id="id_8501307_1342956_1_1">Utilities Operating Expense, Maintenance and Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_lbl" xml:lang="en-US" id="id_8501307_1342956_2_1">Operation and Maintenance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations" xlink:to="us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_lbl"/>
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