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<!-- RR Donnelley Xcelerate Taxonomy Schema, based on XBRL 2.1  http://www.rrdonnelley.com/ -->
<!-- Version: 6.20.1 -->
<!-- Round: 11 -->
<!-- Creation date: 2013-02-13T18:57:37Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley & Sons Company All Rights Reserved. -->
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        <link:definition>1001 - Document - Document and Entity Information</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/StatementOfFinancialPositionClassified" id="Role_StatementOfFinancialPositionClassified">
        <link:definition>1003 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
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        <link:definition>1004 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
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        <link:definition>1005 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
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        <link:definition>1006 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</link:definition>
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        <link:definition>1007 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical)</link:definition>
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        <link:definition>1008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
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        <link:definition>1009 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY</link:definition>
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        <link:definition>1010 - Disclosure - Business</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1011 - Disclosure - Accounting Changes and Reclassifications</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlock" id="Role_NotesToFinancialStatementsSignificantAccountingPoliciesTextBlock">
        <link:definition>1012 - Disclosure - Summary of Significant Accounting Policies</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1013 - Disclosure - Landfill and Environmental Remediation Liabilities</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1014 - Disclosure - Property and Equipment</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1015 - Disclosure - Goodwill and Other Intangible Assets</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1016 - Disclosure - Debt</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1017 - Disclosure - Derivative Instruments and Hedging Activities</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1018 - Disclosure - Income Taxes</link:definition>
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        <link:definition>1019 - Disclosure - Employee Benefit Plans</link:definition>
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        <link:definition>1020 - Disclosure - Commitments and Contingencies</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlock" id="Role_NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlock">
        <link:definition>1021 - Disclosure - Restructuring</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsUnusualOrInfrequentItemsDisclosureTextBlock" id="Role_NotesToFinancialStatementsUnusualOrInfrequentItemsDisclosureTextBlock">
        <link:definition>1022 - Disclosure - Asset Impairments and Unusual Items</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlock" id="Role_NotesToFinancialStatementsComprehensiveIncomeNoteTextBlock">
        <link:definition>1023 - Disclosure - Accumulated Other Comprehensive Income</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsCapitalStockDividendsAndShareRepurchasesTextBlock" id="Role_NotesToFinancialStatementsCapitalStockDividendsAndShareRepurchasesTextBlock">
        <link:definition>1024 - Disclosure - Capital Stock, Dividends and Share Repurchases</link:definition>
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        <link:definition>1025 - Disclosure - Stock-Based Compensation</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock" id="Role_NotesToFinancialStatementsEarningsPerShareTextBlock">
        <link:definition>1026 - Disclosure - Earnings Per Share</link:definition>
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        <link:definition>1027 - Disclosure - Fair Value Measurements</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlock" id="Role_NotesToFinancialStatementsBusinessCombinationDisclosureTextBlock">
        <link:definition>1028 - Disclosure - Acquisitions and Divestitures</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsScheduleOfVariableInterestEntitiesTextBlock" id="Role_NotesToFinancialStatementsScheduleOfVariableInterestEntitiesTextBlock">
        <link:definition>1029 - Disclosure - Variable Interest Entities</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock" id="Role_NotesToFinancialStatementsSegmentReportingDisclosureTextBlock">
        <link:definition>1030 - Disclosure - Segment and Related Information</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsQuarterlyFinancialInformationTextBlock" id="Role_NotesToFinancialStatementsQuarterlyFinancialInformationTextBlock">
        <link:definition>1031 - Disclosure - Quarterly Financial Data (Unaudited)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialStatementsTextBlock" id="Role_NotesToFinancialStatementsCondensedFinancialStatementsTextBlock">
        <link:definition>1032 - Disclosure - Condensed Consolidating Financial Statements</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsSubsequentEventsTextBlock" id="Role_NotesToFinancialStatementsSubsequentEventsTextBlock">
        <link:definition>1033 - Disclosure - Subsequent Event</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" id="Role_NotesToFinancialStatementsScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock">
        <link:definition>1034 - Disclosure - VALUATION AND QUALIFYING ACCOUNTS</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsAccountingChangesAndErrorCorrectionsTextBlockPolicies" id="Role_NotesToFinancialStatementsAccountingChangesAndErrorCorrectionsTextBlockPolicies">
        <link:definition>1035 - Disclosure - Accounting Changes and Reclassifications (Policies)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockTables" id="Role_NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockTables">
        <link:definition>1036 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsAccruedCappingClosurePostClosureAndEnvironmentalCostsDisclosuresTextBlockTables" id="Role_NotesToFinancialStatementsAccruedCappingClosurePostClosureAndEnvironmentalCostsDisclosuresTextBlockTables">
        <link:definition>1037 - Disclosure - Landfill and Environmental Remediation Liabilities (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlockTables">
        <link:definition>1038 - Disclosure - Property and Equipment (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1039 - Disclosure - Goodwill and Other Intangible Assets (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsDebtDisclosureTextBlockTables">
        <link:definition>1040 - Disclosure - Debt (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsDerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsDerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlockTables">
        <link:definition>1041 - Disclosure - Derivative Instruments and Hedging Activities (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1042 - Disclosure - Income Taxes (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsPensionAndOtherPostretirementBenefitsDisclosureTextBlockTables">
        <link:definition>1043 - Disclosure - Employee Benefit Plans (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables">
        <link:definition>1044 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables">
        <link:definition>1045 - Disclosure - Restructuring (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsUnusualOrInfrequentItemsDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsUnusualOrInfrequentItemsDisclosureTextBlockTables">
        <link:definition>1046 - Disclosure - Asset Impairments and Unusual Items (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables" id="Role_NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables">
        <link:definition>1047 - Disclosure - Accumulated Other Comprehensive Income (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsCapitalStockDividendsAndShareRepurchasesTextBlockTables" id="Role_NotesToFinancialStatementsCapitalStockDividendsAndShareRepurchasesTextBlockTables">
        <link:definition>1048 - Disclosure - Capital Stock, Dividends and Share Repurchases (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables" id="Role_NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables">
        <link:definition>1049 - Disclosure - Stock-Based Compensation (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlockTables" id="Role_NotesToFinancialStatementsEarningsPerShareTextBlockTables">
        <link:definition>1050 - Disclosure - Earnings Per Share (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsFairValueDisclosuresTextBlockTables" id="Role_NotesToFinancialStatementsFairValueDisclosuresTextBlockTables">
        <link:definition>1051 - Disclosure - Fair Value Measurements (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables">
        <link:definition>1052 - Disclosure - Acquisitions and Divestitures (Tables)</link:definition>
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        <link:definition>1053 - Disclosure - Segment and Related Information (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1054 - Disclosure - Quarterly Financial Data (Unaudited) (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1055 - Disclosure - Condensed Consolidating Financial Statements (Tables)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureBusinessAdditionalInformation" id="DisclosureBusinessAdditionalInformation">
        <link:definition>1056 - Disclosure - Business - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation" id="DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation">
        <link:definition>1057 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1058 - Disclosure - Summary of Significant Accounting Policies - Summary of Revisions in Risk-Free Discount Rate Applied to Environmental Remediation Liabilities and Recovery Assets (Detail)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1059 - Disclosure - Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives for Significant Property and Equipment Categories (Detail)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1060 - Disclosure - Summary of Significant Accounting Policies - Summary of Equity and Cost Method Investments (Detail)</link:definition>
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        <link:definition>1061 - Disclosure - Summary of Significant Accounting Policies - Schedule of Supplemental Cash Flow Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1062 - Disclosure - Landfill and Environmental Remediation Liabilities - Liabilities for Landfill and Environmental Remediation Costs (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1063 - Disclosure - Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Detail)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1064 - Disclosure - Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1065 - Disclosure - Landfill and Environmental Remediation Liabilities - Additional Information (Detail)</link:definition>
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        <link:definition>1066 - Disclosure - Property and Equipment - Property and Equipment (Detail)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1067 - Disclosure - Property and Equipment - Depreciation and Amortization Expense Including Amortization Expense for Assets Recorded as Capital Leases (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1068 - Disclosure - Goodwill and Other Intangible assets - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1069 - Disclosure - Goodwill and Other Intangible assets - Schedule of Other Intangible Assets (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDebtComponentsOfDebt" id="DisclosureDebtComponentsOfDebt">
        <link:definition>1070 - Disclosure - Debt - Components of Debt (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDebtComponentsOfDebtParenthetical" id="DisclosureDebtComponentsOfDebtParenthetical">
        <link:definition>1071 - Disclosure - Debt - Components of Debt (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1072 - Disclosure - Debt - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1073 - Disclosure - Debt - Summary of Requirements of Financial Covenants Contained in Revolving Credit Facility (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1074 - Disclosure - Derivative Instruments and Hedging Activities - Fair Values of Derivative Instruments Recorded in Balance Sheet (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1075 - Disclosure - Derivative Instruments and Hedging Activities - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1076 - Disclosure - Derivative Instruments and Hedging Activities - Accumulated Fair Value Adjustments from Interest Rate Swap Agreements (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1077 - Disclosure - Derivative Instruments and Hedging Activities - Impact of Changes in Fair Value of Interest Rate Swaps and Underlying Hedged Items on Results of Operations (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1078 - Disclosure - Derivative Instruments and Hedging Activities - Impact of Periodic Settlements of Active Swap Agreements and Impact of Terminated Swap Agreements on Results of Operations (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1079 - Disclosure - Derivative Instruments and Hedging Activities - Impact of Periodic Settlements of Active Swap Agreements and Impact of Terminated Swap Agreements on Results of Operations (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1080 - Disclosure - Derivative Instruments and Hedging Activities - Impact of Pretax Income on Cash Flow Derivatives on Comprehensive Income and Results of Operations (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1081 - Disclosure - Income Taxes - Provision for Income Taxes (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1082 - Disclosure - Income Taxes - U.S. Federal Statutory Income Tax Rate Reconciled to Effective Rate (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1083 - Disclosure - Income Taxes - Income Before Income Taxes Showing Domestic and Foreign Sources (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1084 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1085 - Disclosure - Income Taxes - Components of Net Deferred Tax Assets (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1086 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Amount of Gross Unrecognized Tax Benefits, Including Accrued Interest (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1087 - Disclosure - Employee Benefit Plans - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1088 - Disclosure - Employee benefit Plans - Individually Significant Multiemployer Pension Plans (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1089 - Disclosure - Employee benefit Plans - Individually Significant Multiemployer Pension Plans (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1090 - Disclosure - Employee Benefit Plans - Multiemployer Plan and Year with Employer's Total Contribution Greater Than 5% (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1091 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1092 - Disclosure - Commitments and Contingencies - Changes to Net Insurance Liabilities (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1093 - Disclosure - Commitments and Contingencies - Changes to Net Insurance Liabilities (Parenthetical) (Detail)</link:definition>
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        <link:definition>1095 - Disclosure - Restructuring - Restructuring Charges Pre Tax by Segment (Detail)</link:definition>
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        <link:definition>1096 - Disclosure - Asset Impairments and Unusual Items - Components of (Income) Expense from Divestitures, Asset Impairments and Unusual Items (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1098 - Disclosure - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income Included in Shareholders' Equity (Detail)</link:definition>
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        <link:definition>1099 - Disclosure - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income Included in Shareholders' Equity (Parenthetical) (Detail)</link:definition>
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  <element name="VariableInterestEntityReportingEntityPercentageOfInterestInEarningsAfterAchievingTargetedReturns" id="wm_VariableInterestEntityReportingEntityPercentageOfInterestInEarningsAfterAchievingTargetedReturns" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VariableInterestEntityThirdPartiesPercentageOfInterestInEarningsAfterAchievingTargetedReturns" id="wm_VariableInterestEntityThirdPartiesPercentageOfInterestInEarningsAfterAchievingTargetedReturns" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VariableInterestEntityThirdPartyInitialInvestment" id="wm_VariableInterestEntityThirdPartyInitialInvestment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VariableInterestEntityThirdPartyOwnershipPercentage" id="wm_VariableInterestEntityThirdPartyOwnershipPercentage" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VariableRateTaxExemptBonds" id="wm_VariableRateTaxExemptBonds" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VehiclesExcludingRailHaulCarsMember" id="wm_VehiclesExcludingRailHaulCarsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VehiclesRailHaulCarsMember" id="wm_VehiclesRailHaulCarsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VendorRelationshipsMember" id="wm_VendorRelationshipsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteManagementHoldingsSeniorIndebtednessMember" id="wm_WasteManagementHoldingsSeniorIndebtednessMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteManagementSeniorIndebtednessMember" id="wm_WasteManagementSeniorIndebtednessMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WastePaperMember" id="wm_WastePaperMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteToEnergyFacilitiesAndRelatedEquipmentMember" id="wm_WasteToEnergyFacilitiesAndRelatedEquipmentMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WesternConferenceOfTeamstersPensionPlanMember" id="wm_WesternConferenceOfTeamstersPensionPlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WesternPennsylvaniaTeamstersAndEmployersPensionPlanMember" id="wm_WesternPennsylvaniaTeamstersAndEmployersPensionPlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WheelabratorMember" id="wm_WheelabratorMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="YearContributionsToPlanExceededFivePercent" id="wm_YearContributionsToPlanExceededFivePercent" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
</schema>
