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  <xs:element id="awr_RegulatoryAssetAmountBilledToCustomersAsSurcharges" abstract="false" name="RegulatoryAssetAmountBilledToCustomersAsSurcharges" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_TaxesAndInterestPaidAbstract" abstract="true" name="TaxesAndInterestPaidAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_OperatingExpensesandOtherExpenses" abstract="false" name="OperatingExpensesandOtherExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_MilitaryPrivatizationDisclosureAbstract" abstract="true" name="MilitaryPrivatizationDisclosureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_WaterServiceUtilityOperationsMember" abstract="true" name="WaterServiceUtilityOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_SupplyCostBalancingAccounts" abstract="false" name="SupplyCostBalancingAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_AllowanceForDoubtfulAccountsDisclosureAbstract" abstract="true" name="AllowanceForDoubtfulAccountsDisclosureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_LowIncomeRateAssistanceBalancingAccountsMember" abstract="true" name="LowIncomeRateAssistanceBalancingAccountsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="awr_AmericanRecoveryAndReinvestmentActObligationDue2033Member" abstract="true" name="AmericanRecoveryAndReinvestmentActObligationDue2033Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax" abstract="false" name="DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_AllowanceForDoubtfulAccountsReceivableLineItems" abstract="true" name="AllowanceForDoubtfulAccountsReceivableLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_FiniteLivedIntangibleAssetsEstimatedFutureAmortizationExpense" abstract="false" name="FiniteLivedIntangibleAssetsEstimatedFutureAmortizationExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_PropertyPlantAndEquipmentAndInvestmentsOtherNet" abstract="false" name="PropertyPlantAndEquipmentAndInvestmentsOtherNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_GoodwillAcquiredInPriorPeriod" abstract="false" name="GoodwillAcquiredInPriorPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ContractInitialOrderValueToPerformAnEvaluationConstructionAndTransitionServices" abstract="false" name="ContractInitialOrderValueToPerformAnEvaluationConstructionAndTransitionServices" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_DefinedBenefitPlanUltimateHealthCareCostTrendRateForEmployeesOfAgeSixtyFiveAndOver" abstract="false" name="DefinedBenefitPlanUltimateHealthCareCostTrendRateForEmployeesOfAgeSixtyFiveAndOver" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="awr_NumberOfRegistrantsFilingCombinedReport" abstract="false" name="NumberOfRegistrantsFilingCombinedReport" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="awr_DefinedBenefitPlanAmountsRecognizedinRegulatoryAssetLiabilityNewPriorServiceCostCredit" abstract="false" name="DefinedBenefitPlanAmountsRecognizedinRegulatoryAssetLiabilityNewPriorServiceCostCredit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_UtilityPlantAndIntangibleAssetsDisclosureAbstract" abstract="true" name="UtilityPlantAndIntangibleAssetsDisclosureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_RegulatoryAssetNotAccruingCarryingCosts" abstract="false" name="RegulatoryAssetNotAccruingCarryingCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ContractwithCustomerAssetandLiabilityTable" abstract="true" name="ContractwithCustomerAssetandLiabilityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="awr_DefinedBenefitPlanAmountsUnfundedAccruedPensionCost" abstract="false" name="DefinedBenefitPlanAmountsUnfundedAccruedPensionCost" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ScheduleOfCashFlowSupplementalDisclosuresTable" abstract="true" name="ScheduleOfCashFlowSupplementalDisclosuresTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="awr_UtilitiesOperatingExpenseWaterPurchased" abstract="false" name="UtilitiesOperatingExpenseWaterPurchased" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_PublicUtilitiesApprovedDebtCapitalStructureInMay2021CostOfCapitalApplicationPercentage" abstract="false" name="PublicUtilitiesApprovedDebtCapitalStructureInMay2021CostOfCapitalApplicationPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="awr_DefinedBenefitPlanAmountsRecognizedinRegulatoryAssetLiabilityPriorServiceCostCredit" abstract="false" name="DefinedBenefitPlanAmountsRecognizedinRegulatoryAssetLiabilityPriorServiceCostCredit" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_DefinedBenefitPlanNetPeriodicBenefitCostBeforeAllocationToOverheadPool" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostBeforeAllocationToOverheadPool" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ScheduleOfDebtInstrumentsTable" abstract="true" name="ScheduleOfDebtInstrumentsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="awr_DefinedBenefitPlanAmortizationOfGainsLossesRegulatoryAssets" abstract="false" name="DefinedBenefitPlanAmortizationOfGainsLossesRegulatoryAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_SurchargesCostrecoveryActivitiesMember" abstract="true" name="SurchargesCostrecoveryActivitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_AccruedIncomeTaxesAndOtherLiabilitiesNoncurrent" abstract="false" name="AccruedIncomeTaxesAndOtherLiabilitiesNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_USSmallCapStocksMember" abstract="true" name="USSmallCapStocksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag" abstract="false" name="EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_PaymentsOfDividendsFromSubsidiaries" abstract="false" name="PaymentsOfDividendsFromSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_DefinedBenefitPlanFairValueOfPlanAssetsSubjectToClaimsOfCreditors" abstract="false" name="DefinedBenefitPlanFairValueOfPlanAssetsSubjectToClaimsOfCreditors" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_WaterPlanningStudiesMember" abstract="true" name="WaterPlanningStudiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_CustomerAdvancesOrDepositsPolicyTextBlock" abstract="false" name="CustomerAdvancesOrDepositsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="awr_DerivativeActivityVolume" abstract="false" name="DerivativeActivityVolume" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:energyItemType"/>
  <xs:element id="awr_DefinedBenefitPlanNumberOfHighestConsecutiveYearsAverageEarningsUsedInComputingRetirementBenefit" abstract="false" name="DefinedBenefitPlanNumberOfHighestConsecutiveYearsAverageEarningsUsedInComputingRetirementBenefit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_OtherProductsandServicesMember" abstract="true" name="OtherProductsandServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_AccountsReceivableFromUSGovernmentNetCurrent" abstract="false" name="AccountsReceivableFromUSGovernmentNetCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_DefinedBenefitPlanMaximumNumberOfYearsOfCreditedServiceConsideredInComputingRetirementBenefit" abstract="false" name="DefinedBenefitPlanMaximumNumberOfYearsOfCreditedServiceConsideredInComputingRetirementBenefit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_TariffbasedRevenuesMember" abstract="true" name="TariffbasedRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_UtilitiesWaterPropertyPlantAndEquipmentGross" abstract="false" name="UtilitiesWaterPropertyPlantAndEquipmentGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_BayStateUtilityServiceLLCBSUSMember" abstract="true" name="BayStateUtilityServiceLLCBSUSMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="awr_DefinedBenefitPlanAmortizationOfPriorServiceCostCreditRegulatoryAssets" abstract="false" name="DefinedBenefitPlanAmortizationOfPriorServiceCostCreditRegulatoryAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_DefinedBenefitPlanInitialHealthCareCostTrendRateForEmployeesUnderAgeSixtyFive" abstract="false" name="DefinedBenefitPlanInitialHealthCareCostTrendRateForEmployeesUnderAgeSixtyFive" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="awr_RelatedPartyTransactionsPolicyTextBlock" abstract="false" name="RelatedPartyTransactionsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="awr_AllowanceForDoubtfulAccountsReceivableTable" abstract="true" name="AllowanceForDoubtfulAccountsReceivableTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="awr_AmericanStatesUtilityServicesMember" abstract="true" name="AmericanStatesUtilityServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_AllowanceForDoubtfulAccountsRelatedToReceivableFromCustomer" abstract="false" name="AllowanceForDoubtfulAccountsRelatedToReceivableFromCustomer" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_AllowanceForDoubtfulAccountsRelatedToOtherAccountsReceivable" abstract="false" name="AllowanceForDoubtfulAccountsRelatedToOtherAccountsReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_FlowThroughTaxesNetMember" abstract="true" name="FlowThroughTaxesNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_InvestmentsMaturityPeriod" abstract="false" name="InvestmentsMaturityPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_RatioofIndebtednesstoEBITDA" abstract="false" name="RatioofIndebtednesstoEBITDA" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="awr_PensionAndOtherPostRetirementObligationsAxis" abstract="true" name="PensionAndOtherPostRetirementObligationsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="awr_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_IncreaseDecreaseInUnbilledContractsReceivables" abstract="false" name="IncreaseDecreaseInUnbilledContractsReceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ElectricSupplyCostAdjustmentMechanismMember" abstract="true" name="ElectricSupplyCostAdjustmentMechanismMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="awr_OtherVariousThirdPartiesMember" abstract="true" name="OtherVariousThirdPartiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_SourceOfWaterSupplyMember" abstract="true" name="SourceOfWaterSupplyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_ChangeInControlTerm" abstract="false" name="ChangeInControlTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_NumberOfCustomers" abstract="false" name="NumberOfCustomers" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="awr_IncomeTaxReconciliationCostofRemoval" abstract="false" name="IncomeTaxReconciliationCostofRemoval" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_NotesPayable4949PercentDue2037Member" abstract="true" name="NotesPayable4949PercentDue2037Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_NotesPayable7.23PercentDue2031Member" abstract="true" name="NotesPayable7.23PercentDue2031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_WaterTransmissionAndDistributionMember" abstract="true" name="WaterTransmissionAndDistributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_DefinedBenefitPlanCostRecognizedInRegulatoryAssetsLiability" abstract="false" name="DefinedBenefitPlanCostRecognizedInRegulatoryAssetsLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_PurchasedRenewableEnergyCreditsNumberDeliveredIn2024" abstract="false" name="PurchasedRenewableEnergyCreditsNumberDeliveredIn2024" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="awr_WaterRevenueAdjustmentMechanismMember" abstract="true" name="WaterRevenueAdjustmentMechanismMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_ScheduleOfCashFlowSupplementalDisclosuresLineItems" abstract="true" name="ScheduleOfCashFlowSupplementalDisclosuresLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_RenewablesPortfolioStandardMember" abstract="true" name="RenewablesPortfolioStandardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_BasisOfPresentationAbstract" abstract="true" name="BasisOfPresentationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_WastewaterMember" abstract="true" name="WastewaterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_PaymentsForProceedsFromRelatedPartyDebt" abstract="false" name="PaymentsForProceedsFromRelatedPartyDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_DefinedContributionPlanEligiblePeriodOfServiceForMatchingContribution" abstract="false" name="DefinedContributionPlanEligiblePeriodOfServiceForMatchingContribution" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_AllowanceForDoubtfulAccountsDisclosureTextBlock" abstract="false" name="AllowanceForDoubtfulAccountsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="awr_NumberOfStockIncentivePlans" abstract="false" name="NumberOfStockIncentivePlans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="awr_DefinedBenefitPlanNetGainsLossesRegulatoryAssets" abstract="false" name="DefinedBenefitPlanNetGainsLossesRegulatoryAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_LineofCreditFacilityIncrementalExpansionofBorrowingCapacity" abstract="false" name="LineofCreditFacilityIncrementalExpansionofBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ScheduleOfRegulatoryAssetsAndLiabilitiesTable" abstract="true" name="ScheduleOfRegulatoryAssetsAndLiabilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="awr_ScheduleOfNetBenefitCostsAndAssumptionsTableTextBlock" abstract="false" name="ScheduleOfNetBenefitCostsAndAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="awr_CostOfCapitalProceedingMember" abstract="true" name="CostOfCapitalProceedingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_DefinedBenefitPlanExpectedFutureBenefitPayment" abstract="false" name="DefinedBenefitPlanExpectedFutureBenefitPayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_RegulatedUtilitiesPropertyPlantAndEquipmentGrossAbstract" abstract="true" name="RegulatedUtilitiesPropertyPlantAndEquipmentGrossAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_DefinedBenefitPlanRetirementBenefitPercentage" abstract="false" name="DefinedBenefitPlanRetirementBenefitPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="awr_COVID19MemorandumAccountCEMAMember" abstract="true" name="COVID19MemorandumAccountCEMAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_DefinedBenefitPlanChangeInPlanAssetsAndBenefitObligationsRecognizedInRegulatoryAssetsRollForward" abstract="true" name="DefinedBenefitPlanChangeInPlanAssetsAndBenefitObligationsRecognizedInRegulatoryAssetsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_SalesRevenueNetAndOtherIncome" abstract="false" name="SalesRevenueNetAndOtherIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ShareBasedCompensationArrangementsbyShareBasedPaymentAwardOptionsMinimumAgeforAwardstoVestImmediately" abstract="false" name="ShareBasedCompensationArrangementsbyShareBasedPaymentAwardOptionsMinimumAgeforAwardstoVestImmediately" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_AllowanceForDoubtfulAccountsReceivableChargeOffsNetOfRecoveries" abstract="false" name="AllowanceForDoubtfulAccountsReceivableChargeOffsNetOfRecoveries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_NotesPayable512PercentDue2033Member" abstract="true" name="NotesPayable512PercentDue2033Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_IncreaseDecreaseinContractAssets" abstract="false" name="IncreaseDecreaseinContractAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ThresholdPercentageOfMoodysAverageBondRateUsedAdjustingReturnOnEquityAndRateOfReturnOnRateBaseIncreaseDecrease" abstract="false" name="ThresholdPercentageOfMoodysAverageBondRateUsedAdjustingReturnOnEquityAndRateOfReturnOnRateBaseIncreaseDecrease" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="awr_IncrementalVegetationManagementCosts" abstract="false" name="IncrementalVegetationManagementCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="awr_DividendsEquivalentRightsOnShareBasedCompensationNetOfTax" abstract="false" name="DividendsEquivalentRightsOnShareBasedCompensationNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_IncreaseDecreaseInRelatedPartyReceivablePayableCurrent" abstract="false" name="IncreaseDecreaseInRelatedPartyReceivablePayableCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_WaterPurchaseCommitmentsMember" abstract="true" name="WaterPurchaseCommitmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_UtilitiesElectricPropertyPlantAndEquipmentGross" abstract="false" name="UtilitiesElectricPropertyPlantAndEquipmentGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_IntercompanyBorrowingsPaymentTerm" abstract="false" name="IntercompanyBorrowingsPaymentTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_InternationalFundsMember" abstract="true" name="InternationalFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_WaterPlantGeneralMember" abstract="true" name="WaterPlantGeneralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_TriggersForTheWCMAAdjustmentImpactOf1028BasisPointIncreaseInMoodysRatePercent" abstract="false" name="TriggersForTheWCMAAdjustmentImpactOf1028BasisPointIncreaseInMoodysRatePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="awr_EnvironmentalLossContingenciesPaidByThirdParty" abstract="false" name="EnvironmentalLossContingenciesPaidByThirdParty" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_RenewablesPortfolioStandardBundledProductMember" abstract="true" name="RenewablesPortfolioStandardBundledProductMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="awr_ElectricPowerPurchaseCommitmentsMember" abstract="true" name="ElectricPowerPurchaseCommitmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_DefinedBenefitPlanMinimumPeriodOfServiceForEligibility" abstract="false" name="DefinedBenefitPlanMinimumPeriodOfServiceForEligibility" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_Incometaxratereconciliationexcessdeferredtaxamortization" abstract="false" name="Incometaxratereconciliationexcessdeferredtaxamortization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_TriggersForTheWCMAAdjustmentImpactOf1397BasisPointIncreaseInMoodysRatePercent" abstract="false" name="TriggersForTheWCMAAdjustmentImpactOf1397BasisPointIncreaseInMoodysRatePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="awr_DefinedBenefitPlanNetPeriodicBenefitCostAndCostRecognizedInRegulatoryAssets" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostAndCostRecognizedInRegulatoryAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_PublicUtilitiesPropertyPlantAndEquipmentDepreciationOnTransportationEquipment" abstract="false" name="PublicUtilitiesPropertyPlantAndEquipmentDepreciationOnTransportationEquipment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_NotesPayable4548PercentDue2032Member" abstract="true" name="NotesPayable4548PercentDue2032Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_FranchiseAndAssessmentFeesTaxes" abstract="false" name="FranchiseAndAssessmentFeesTaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_EnvironmentalCleanUpAndRemediationMember" abstract="true" name="EnvironmentalCleanUpAndRemediationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="awr_IncomeTaxDisclosureLineItems" abstract="true" name="IncomeTaxDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_RegulatoryAndOtherAssets" abstract="false" name="RegulatoryAndOtherAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_RetroactiveWaterRevenuesImpactAsAResultOfAProposedDecision" abstract="false" name="RetroactiveWaterRevenuesImpactAsAResultOfAProposedDecision" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_DividendLimitationsDisclosureTable" abstract="true" name="DividendLimitationsDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="awr_DefinedBenefitPlanAmountsRecognizedInRegulatoryAssetLiabilityNetGainsLosses" abstract="false" name="DefinedBenefitPlanAmountsRecognizedInRegulatoryAssetLiabilityNetGainsLosses" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_PublicUtilitiesApprovedDebtCapitalStructurePercentagePreviouslyAuthorized" abstract="false" name="PublicUtilitiesApprovedDebtCapitalStructurePercentagePreviouslyAuthorized" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="awr_AdjustmentToReturnOnEquityIfMoreThan100BasisPointChange" abstract="false" name="AdjustmentToReturnOnEquityIfMoreThan100BasisPointChange" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="awr_DefinedBenefitPlanAmountsRecognizedinRegulatoryAssetLiability" abstract="false" name="DefinedBenefitPlanAmountsRecognizedinRegulatoryAssetLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ScheduleOfRegulatoryAssetsAndLiabilitiesLineItems" abstract="true" name="ScheduleOfRegulatoryAssetsAndLiabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_AccountingPoliciesLineItems" abstract="true" name="AccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_DefinedBenefitPlanAmountsRecognizedInRegulatoryAssetsLiabilityAbstract" abstract="true" name="DefinedBenefitPlanAmountsRecognizedInRegulatoryAssetsLiabilityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_PowerPurchasedForPumping" abstract="false" name="PowerPurchasedForPumping" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_AllowanceForDoubtfulAccountsReceivableTableTextBlock" abstract="false" name="AllowanceForDoubtfulAccountsReceivableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="awr_RegulatoryAssetCEMA" abstract="false" name="RegulatoryAssetCEMA" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_ProceedsfromStockOptionsExercisedDistributedtoSubsidiaries" abstract="false" name="ProceedsfromStockOptionsExercisedDistributedtoSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_UnderCollectionInTwoWayPensionBalancingAccountMember" abstract="true" name="UnderCollectionInTwoWayPensionBalancingAccountMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_IntercompanyNotePayable" abstract="false" name="IntercompanyNotePayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_VestingRightsPercentageInThirdYearFromGrantDate" abstract="false" name="VestingRightsPercentageInThirdYearFromGrantDate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="awr_PatuxentRiverUtilityServicesLLCPRUSMember" abstract="true" name="PatuxentRiverUtilityServicesLLCPRUSMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="awr_PropertyPlantAndEquipmentBeforeConstructionWorkInProgress" abstract="false" name="PropertyPlantAndEquipmentBeforeConstructionWorkInProgress" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_NotesPayable6PercentDue2041Member" abstract="true" name="NotesPayable6PercentDue2041Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_PublicUtilitiesApprovedReturnOnEquityPercentagePreviouslyAuthorized" abstract="false" name="PublicUtilitiesApprovedReturnOnEquityPercentagePreviouslyAuthorized" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="awr_ScheduleOfActualAllocationOfPlanAssetsTableTextBlock" abstract="false" name="ScheduleOfActualAllocationOfPlanAssetsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="awr_DocumentAndEntityInformationAbstract" abstract="true" name="DocumentAndEntityInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_ScheduleOfPlansFundedStatusAndAmountRecognizedInBalanceSheetsComponentsOfNetPensionCostAccruedPostRetirementLiabilityAndAssumptionsTableTextBlock" abstract="false" name="ScheduleOfPlansFundedStatusAndAmountRecognizedInBalanceSheetsComponentsOfNetPensionCostAccruedPostRetirementLiabilityAndAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="awr_WaterTreatmentEquipmentMember" abstract="true" name="WaterTreatmentEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_NatureOfOperationsAbstract" abstract="true" name="NatureOfOperationsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_ConservationMember" abstract="true" name="ConservationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_AssetRetirementObligationsMember" abstract="true" name="AssetRetirementObligationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="awr_DefinedBenefitPlanUltimateHealthCareCostTrendRateForEmployeesUnderAgeSixtyFive" abstract="false" name="DefinedBenefitPlanUltimateHealthCareCostTrendRateForEmployeesUnderAgeSixtyFive" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="awr_RestrictedShareUnitIncludingPerformanceSharesMember" abstract="true" name="RestrictedShareUnitIncludingPerformanceSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_StateWaterProjectDue2035Member" abstract="true" name="StateWaterProjectDue2035Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_TermForTheCostOfCapitalProceeding" abstract="false" name="TermForTheCostOfCapitalProceeding" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="awr_NotesPayable522PercentDue2038Member" abstract="true" name="NotesPayable522PercentDue2038Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_AdditionAbstract" abstract="true" name="AdditionAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="awr_PurchasedRenewableEnergyCreditsNumber" abstract="false" name="PurchasedRenewableEnergyCreditsNumber" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="awr_OtherPostretirementBenefitNonunionPlanDefinedBenefitMember" abstract="true" name="OtherPostretirementBenefitNonunionPlanDefinedBenefitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_DefinedBenefitPlanMinimumAgeForEligibility" abstract="false" name="DefinedBenefitPlanMinimumAgeForEligibility" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="awr_AccountReceivablefromUSGovernmentNetNoncurrent" abstract="false" name="AccountReceivablefromUSGovernmentNetNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_DefinedBenefitPlanNumberofEmployeesCovered" abstract="false" name="DefinedBenefitPlanNumberofEmployeesCovered" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="awr_DebtInstrumentCovenantInterestCoverageRatio" abstract="false" name="DebtInstrumentCovenantInterestCoverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="awr_WaterAndWaterServiceRightsMember" abstract="true" name="WaterAndWaterServiceRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="awr_DividendLimitationDisclosureTextBlock" abstract="false" name="DividendLimitationDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="awr_RefundsOnAdvancesForConstruction" abstract="false" name="RefundsOnAdvancesForConstruction" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="awr_AlternativeRevenueProgramMember" abstract="true" name="AlternativeRevenueProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
