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  <xs:element id="es_ReserveAdjustmentforRevenueSubjecttoRefundMember" abstract="true" name="ReserveAdjustmentforRevenueSubjecttoRefundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="es_SouthForkClassBMemberLLCMember" abstract="true" name="SouthForkClassBMemberLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="es_NaturalGasInfrastructurePipelineOwnedByEnbridgeInc.Member" abstract="true" name="NaturalGasInfrastructurePipelineOwnedByEnbridgeInc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="es_AccountsReceivableAllowanceForCreditLossWriteoffNetOfAdjustments" abstract="false" name="AccountsReceivableAllowanceForCreditLossWriteoffNetOfAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="es_AmountOfNaturalGasTransmissionPurchased" abstract="false" name="AmountOfNaturalGasTransmissionPurchased" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="es_PublicUtilitiesPropertyPlantAndEquipmentDistributionWater" abstract="false" name="PublicUtilitiesPropertyPlantAndEquipmentDistributionWater" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="es_OtherEquityMethodInvestmentsMember" abstract="true" name="OtherEquityMethodInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_LossContingencyBaseROESubsequentlyAuthorizedByFERCForFirstComplaintPeriodAndProspectivelyFromOctober2014" abstract="false" name="LossContingencyBaseROESubsequentlyAuthorizedByFERCForFirstComplaintPeriodAndProspectivelyFromOctober2014" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="es_HardshipAccountsMember" abstract="true" name="HardshipAccountsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_RevolutionWindLLCMember" abstract="true" name="RevolutionWindLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_SecuredOvernightFinancingRateSOFRMember" abstract="true" name="SecuredOvernightFinancingRateSOFRMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="es_RelatedIntercompanyAllocationsOfDefinedBenefitExpense" abstract="false" name="RelatedIntercompanyAllocationsOfDefinedBenefitExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="es_RollforwardOfNetDerivativeAssetLiabilitiesValuedUsingUnobservableInputsTableTextBlock" abstract="false" name="RollforwardOfNetDerivativeAssetLiabilitiesValuedUsingUnobservableInputsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
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  <xs:element id="es_RockyRiverRealtyCompanyAndEversourceServiceMember" abstract="true" name="RockyRiverRealtyCompanyAndEversourceServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_TheConnecticutLightAndPowerCompanyMember" abstract="true" name="TheConnecticutLightAndPowerCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_ExpectedCashFlowsFromSaleOfInvestment" abstract="false" name="ExpectedCashFlowsFromSaleOfInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="es_TaxEquityMember" abstract="true" name="TaxEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="es_NumberOfOffshoreWindProjects" abstract="false" name="NumberOfOffshoreWindProjects" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="es_LossContingencyPercentageOfROEForAnyIncentiveProject" abstract="false" name="LossContingencyPercentageOfROEForAnyIncentiveProject" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="es_CLPAndNSTARMember" abstract="true" name="CLPAndNSTARMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="es_MarketableSecuritiesMember" abstract="true" name="MarketableSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_NaturalGasDistributionMember" abstract="true" name="NaturalGasDistributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_FERCROEComplaintsMember" abstract="true" name="FERCROEComplaintsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_RepaymentsOfRateReductionBonds" abstract="false" name="RepaymentsOfRateReductionBonds" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="es_CyapcAndYaecMember" abstract="true" name="CyapcAndYaecMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_PurchaseGuaranteeMember" abstract="true" name="PurchaseGuaranteeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_EquityInEarningsMember" abstract="true" name="EquityInEarningsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_YankeeCompaniesMember" abstract="true" name="YankeeCompaniesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_AquarionWaterCompanyOfConnecticut589SeniorNotesMember" abstract="true" name="AquarionWaterCompanyOfConnecticut589SeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="es_AccountsReceivableAllowanceForCreditLossDeferredExpenseReversal" abstract="false" name="AccountsReceivableAllowanceForCreditLossDeferredExpenseReversal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="es_LossContingencyEstimateOfPossibleLossNonComplianceFine" abstract="false" name="LossContingencyEstimateOfPossibleLossNonComplianceFine" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="es_NSTARElectric2023560DebenturesMember" abstract="true" name="NSTARElectric2023560DebenturesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="es_TransmissionInterconnectionGuaranteeMember" abstract="true" name="TransmissionInterconnectionGuaranteeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="es_InvestmentIncomeLossMember" abstract="true" name="InvestmentIncomeLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="es_ScheduleofSupplementalCashFlowTable" abstract="true" name="ScheduleofSupplementalCashFlowTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="es_InvestmentTaxCreditPercentRealized" abstract="false" name="InvestmentTaxCreditPercentRealized" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
</xs:schema>
