<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
<!--Generated by ThunderDome XBRL - 08:03PM UTC 2021-05-12--><xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:awx="http://avalonholdings.com/20210331" xmlns:country="http://xbrl.sec.gov/country/2020-01-31" xmlns:currency="http://xbrl.sec.gov/currency/2020-01-31" xmlns:dei="http://xbrl.sec.gov/dei/2019-01-31" xmlns:exch="http://xbrl.sec.gov/exch/2020-01-31" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:naics="http://xbrl.sec.gov/naics/2011-01-31" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:sic="http://xbrl.sec.gov/sic/2020-01-31" xmlns:srt="http://fasb.org/srt/2020-01-31" xmlns:srt-types="http://fasb.org/srt-types/2020-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2018-01-31" xmlns:us-gaap="http://fasb.org/us-gaap/2020-01-31" xmlns:us-types="http://fasb.org/us-types/2020-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://avalonholdings.com/20210331">
  <xsd:import namespace="http://xbrl.sec.gov/sic/2020-01-31" schemaLocation="https://xbrl.sec.gov/sic/2020/sic-2020-01-31.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/exch/2020-01-31" schemaLocation="https://xbrl.sec.gov/exch/2020/exch-2020-01-31.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/naics/2011-01-31" schemaLocation="http://xbrl.sec.gov/naics/2011/naics-2011-01-31.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xsd:import namespace="http://fasb.org/us-gaap/2020-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/country/2020-01-31" schemaLocation="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd"/>
  <xsd:import namespace="http://fasb.org/us-types/2020-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-types-2020-01-31.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2018-01-31" schemaLocation="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd"/>
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/currency/2020-01-31" schemaLocation="https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd"/>
  <xsd:import namespace="http://fasb.org/srt-types/2020-01-31" schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-types-2020-01-31.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd"/>
  <xsd:import namespace="http://fasb.org/srt/2020-01-31" schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd"/>
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="awx-20210331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="awx-20210331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="awx-20210331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="awx-20210331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="statement-document-and-entity-information" roleURI="http://avalonholdings.com/20210331/role/statement-document-and-entity-information">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">000 - Document - Document And Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-operations-unaudited" roleURI="http://avalonholdings.com/20210331/role/statement-condensed-consolidated-statements-of-operations-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">001 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-balance-sheets-current-period-unaudited" roleURI="http://avalonholdings.com/20210331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">002 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals" roleURI="http://avalonholdings.com/20210331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">003 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-shareholders-equity-unaudited" roleURI="http://avalonholdings.com/20210331/role/statement-condensed-consolidated-statements-of-shareholders-equity-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">004 - Statement - Condensed Consolidated Statements of Shareholders' Equity (Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-condensed-consolidated-statements-of-cash-flows-unaudited" roleURI="http://avalonholdings.com/20210331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">005 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-1-description-of-business" roleURI="http://avalonholdings.com/20210331/role/statement-note-1-description-of-business">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">006 - Disclosure - Note 1 - Description of Business</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-2-basis-of-presentation" roleURI="http://avalonholdings.com/20210331/role/statement-note-2-basis-of-presentation">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">007 - Disclosure - Note 2 - Basis of Presentation</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-3-covid19-coronavirus-pandemic" roleURI="http://avalonholdings.com/20210331/role/statement-note-3-covid19-coronavirus-pandemic">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">008 - Disclosure - Note 3 - Covid-19 Coronavirus Pandemic</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-recent-accounting-pronouncements" roleURI="http://avalonholdings.com/20210331/role/statement-note-4-recent-accounting-pronouncements">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">009 - Disclosure - Note 4 - Recent Accounting Pronouncements</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-cash-cash-equivalents-and-restricted-cash" roleURI="http://avalonholdings.com/20210331/role/statement-note-5-cash-cash-equivalents-and-restricted-cash">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">010 - Disclosure - Note 5 - Cash, Cash Equivalents and Restricted Cash</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-revenues" roleURI="http://avalonholdings.com/20210331/role/statement-note-6-revenues">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">011 - Disclosure - Note 6 - Revenues</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-property-and-equipment" roleURI="http://avalonholdings.com/20210331/role/statement-note-7-property-and-equipment">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">012 - Disclosure - Note 7 - Property and Equipment</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-leases" roleURI="http://avalonholdings.com/20210331/role/statement-note-8-leases">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">013 - Disclosure - Note 8 - Leases</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-basic-and-diluted-net-income-loss-per-share" roleURI="http://avalonholdings.com/20210331/role/statement-note-9-basic-and-diluted-net-income-loss-per-share">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">014 - Disclosure - Note 9 - Basic and Diluted Net Income (Loss) Per Share</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-term-loans-and-line-of-credit-agreements" roleURI="http://avalonholdings.com/20210331/role/statement-note-10-term-loans-and-line-of-credit-agreements">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">015 - Disclosure - Note 10 - Term Loans and Line of Credit Agreements</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-income-taxes" roleURI="http://avalonholdings.com/20210331/role/statement-note-11-income-taxes">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">016 - Disclosure - Note 11 - Income Taxes</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-longterm-incentive-plan" roleURI="http://avalonholdings.com/20210331/role/statement-note-12-longterm-incentive-plan">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">017 - Disclosure - Note 12 - Long-term Incentive Plan</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-legal-matters" roleURI="http://avalonholdings.com/20210331/role/statement-note-13-legal-matters">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">018 - Disclosure - Note 13 - Legal Matters</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-business-segment-information" roleURI="http://avalonholdings.com/20210331/role/statement-note-14-business-segment-information">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">019 - Disclosure - Note 14 - Business Segment Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-15-certain-relationships-and-related-transactions" roleURI="http://avalonholdings.com/20210331/role/statement-note-15-certain-relationships-and-related-transactions">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">020 - Disclosure - Note 15 - Certain Relationships and Related Transactions</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-injection-wells-suspension" roleURI="http://avalonholdings.com/20210331/role/statement-note-16-injection-wells-suspension">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">021 - Disclosure - Note 16 - Injection Wells Suspension</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-cash-cash-equivalents-and-restricted-cash-tables" roleURI="http://avalonholdings.com/20210331/role/statement-note-5-cash-cash-equivalents-and-restricted-cash-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">022 - Disclosure - Note 5 - Cash, Cash Equivalents and Restricted Cash (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-revenues-tables" roleURI="http://avalonholdings.com/20210331/role/statement-note-6-revenues-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">023 - Disclosure - Note 6 - Revenues (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-property-and-equipment-tables" roleURI="http://avalonholdings.com/20210331/role/statement-note-7-property-and-equipment-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">024 - Disclosure - Note 7 - Property and Equipment (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-leases-tables" roleURI="http://avalonholdings.com/20210331/role/statement-note-8-leases-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">025 - Disclosure - Note 8 - Leases (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-term-loans-and-line-of-credit-agreements-tables" roleURI="http://avalonholdings.com/20210331/role/statement-note-10-term-loans-and-line-of-credit-agreements-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">026 - Disclosure - Note 10 - Term Loans and Line of Credit Agreements (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-longterm-incentive-plan-tables" roleURI="http://avalonholdings.com/20210331/role/statement-note-12-longterm-incentive-plan-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">027 - Disclosure - Note 12 - Long-term Incentive Plan (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-business-segment-information-tables" roleURI="http://avalonholdings.com/20210331/role/statement-note-14-business-segment-information-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">028 - Disclosure - Note 14 - Business Segment Information (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-1-description-of-business-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-1-description-of-business-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">029 - Disclosure - Note 1 - Description of Business (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-cash-cash-equivalents-and-restricted-cash-cash-cash-equivalents-and-restricted-cash-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-5-cash-cash-equivalents-and-restricted-cash-cash-cash-equivalents-and-restricted-cash-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">030 - Disclosure - Note 5 - Cash, Cash Equivalents and Restricted Cash - Cash, Cash Equivalents and Restricted Cash (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-revenues-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-6-revenues-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">031 - Disclosure - Note 6 - Revenues (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-revenues-disaggregation-of-revenue-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-6-revenues-disaggregation-of-revenue-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">032 - Disclosure - Note 6 - Revenues - Disaggregation of Revenue (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-revenues-allowance-for-doubtful-accounts-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-6-revenues-allowance-for-doubtful-accounts-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">033 - Disclosure - Note 6 - Revenues - Allowance for Doubtful Accounts (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-revenues-contract-assets-and-liabilities-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-6-revenues-contract-assets-and-liabilities-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">034 - Disclosure - Note 6 - Revenues - Contract Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-property-and-equipment-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-7-property-and-equipment-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">035 - Disclosure - Note 7 - Property and Equipment (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-property-and-equipment-summary-of-property-and-equipment-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-7-property-and-equipment-summary-of-property-and-equipment-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">036 - Disclosure - Note 7 - Property and Equipment - Summary of Property and Equipment (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-leases-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-8-leases-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">037 - Disclosure - Note 8 - Leases (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-leases-operating-leases-assets-and-liabilities-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-8-leases-operating-leases-assets-and-liabilities-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">038 - Disclosure - Note 8 - Leases - Operating Leases Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-leases-financing-leases-assets-and-liabilities-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-8-leases-financing-leases-assets-and-liabilities-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">039 - Disclosure - Note 8 - Leases - Financing Leases Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-leases-lease-cost-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-8-leases-lease-cost-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">040 - Disclosure - Note 8 - Leases - Lease Cost (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-leases-future-commitments-under-longterm-leases-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-8-leases-future-commitments-under-longterm-leases-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">041 - Disclosure - Note 8 - Leases - Future Commitments Under Long-term Leases (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-basic-and-diluted-net-income-loss-per-share-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-9-basic-and-diluted-net-income-loss-per-share-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">042 - Disclosure - Note 9 - Basic and Diluted Net Income (Loss) Per Share (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-term-loans-and-line-of-credit-agreements-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-10-term-loans-and-line-of-credit-agreements-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">043 - Disclosure - Note 10 - Term Loans and Line of Credit Agreements (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-term-loans-and-line-of-credit-agreements-summary-of-term-loan-and-line-of-credit-agreements-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-10-term-loans-and-line-of-credit-agreements-summary-of-term-loan-and-line-of-credit-agreements-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">044 - Disclosure - Note 10 - Term Loans and Line of Credit Agreements - Summary of Term Loan and Line of Credit Agreements (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-term-loans-and-line-of-credit-agreements-future-maturities-of-longterm-debt-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-10-term-loans-and-line-of-credit-agreements-future-maturities-of-longterm-debt-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">045 - Disclosure - Note 10 - Term Loans and Line of Credit Agreements - Future Maturities of Long-term Debt (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-income-taxes-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-11-income-taxes-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">046 - Disclosure - Note 11 - Income Taxes (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-longterm-incentive-plan-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-12-longterm-incentive-plan-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">047 - Disclosure - Note 12 - Long-term Incentive Plan (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-longterm-incentive-plan-stock-option-activity-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-12-longterm-incentive-plan-stock-option-activity-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">048 - Disclosure - Note 12 - Long-term Incentive Plan - Stock Option Activity (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-longterm-incentive-plan-period-and-predetermined-stock-price-needed-for-vesting-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-12-longterm-incentive-plan-period-and-predetermined-stock-price-needed-for-vesting-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">049 - Disclosure - Note 12 - Long-term Incentive Plan - Period and Predetermined Stock Price Needed for Vesting (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-business-segment-information-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-14-business-segment-information-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">050 - Disclosure - Note 14 - Business Segment Information (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-business-segment-information-segment-reporting-information-details" roleURI="http://avalonholdings.com/20210331/role/statement-note-14-business-segment-information-segment-reporting-information-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">051 - Disclosure - Note 14 - Business Segment Information - Segment Reporting Information (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-15-certain-relationships-and-related-transactions-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-15-certain-relationships-and-related-transactions-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">052 - Disclosure - Note 15 - Certain Relationships and Related Transactions (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-injection-wells-suspension-details-textual" roleURI="http://avalonholdings.com/20210331/role/statement-note-16-injection-wells-suspension-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">053 - Disclosure - Note 16 - Injection Wells Suspension (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element abstract="true" id="awx_AWMSHoldingsLLCMember" name="AWMSHoldingsLLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_AvalonHoldingsCorporation2009LongTermIncentivePlanAnd2019LongTermIncentivePlanMember" name="AvalonHoldingsCorporation2009LongTermIncentivePlanAnd2019LongTermIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_AvalonHoldingsCorporation2009LongTermIncentivePlanMember" name="AvalonHoldingsCorporation2009LongTermIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_AvalonMedSpaMember" name="AvalonMedSpaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_CaptiveLandfillManagementOperationsMember" name="CaptiveLandfillManagementOperationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_ContractTerm" name="ContractTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_ContractWithCustomerAssetsUnbilledMembershipDues" name="ContractWithCustomerAssetsUnbilledMembershipDues" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="awx_ContractWithCustomerLiabilityBillings" name="ContractWithCustomerLiabilityBillings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="awx_Covid19CoronavirusPandemicTextBlock" name="Covid19CoronavirusPandemicTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_CustomerAdvanceDepositsMember" name="CustomerAdvanceDepositsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_DebtInstrumentCovenantFixedChargeCoverageRatio" name="DebtInstrumentCovenantFixedChargeCoverageRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_DebtInstrumentInterestRateStatedPercentageFirstFiveYears" name="DebtInstrumentInterestRateStatedPercentageFirstFiveYears" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="awx_DebtInstrumentMaturitySchedule" name="DebtInstrumentMaturitySchedule" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_DebtInstrumentPeriodicPaymentNumberOfPayments" name="DebtInstrumentPeriodicPaymentNumberOfPayments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element id="awx_DebtInstrumentPrepaymentPenaltyPercentageFirstFiveYears" name="DebtInstrumentPrepaymentPenaltyPercentageFirstFiveYears" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_DebtInstrumentPrepaymentPenaltyPercentageYearTen" name="DebtInstrumentPrepaymentPenaltyPercentageYearTen" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_DebtInstrumentPrepaymentPenaltyPercentageYearsEightAndNine" name="DebtInstrumentPrepaymentPenaltyPercentageYearsEightAndNine" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_DebtInstrumentPrepaymentPenaltyPercentageYearsSixAndSeven" name="DebtInstrumentPrepaymentPenaltyPercentageYearsSixAndSeven" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_DeferredMembershipDuesMember" name="DeferredMembershipDuesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_FinanceLeaseCostTotal" name="FinanceLeaseCostTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="awx_GolfAndRelatedOperationsMember" name="GolfAndRelatedOperationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_GreenFeesAndCartRentalMember" name="GreenFeesAndCartRentalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_HomeSavingsBankMember" name="HomeSavingsBankMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_IncreaseDecreaseInTotalAssets" name="IncreaseDecreaseInTotalAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="awx_InterestForgiven" name="InterestForgiven" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_InvestmentInSubsidiaryMember" name="InvestmentInSubsidiaryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_LaurelCapitalCorporationMember" name="LaurelCapitalCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_LeaseForGolfCartGPSEquipmentMember" name="LeaseForGolfCartGPSEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_LeaseLiabilityCurrentTotal" name="LeaseLiabilityCurrentTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeaseLiabilityMaturityTableTextBlock" name="LeaseLiabilityMaturityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_LeaseLiabilityNoncurrentTotal" name="LeaseLiabilityNoncurrentTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeaseLiabilityPaymentsDueTotal" name="LeaseLiabilityPaymentsDueTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeaseLiabilityPaymentsDueYearFourTotal" name="LeaseLiabilityPaymentsDueYearFourTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeaseLiabilityPaymentsDueYearThreeTotal" name="LeaseLiabilityPaymentsDueYearThreeTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeaseLiabilityPaymentsDueYearTwoTotal" name="LeaseLiabilityPaymentsDueYearTwoTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeaseLiabilityTotal" name="LeaseLiabilityTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeaseLiabilityUndiscountedExcessAmountTotal" name="LeaseLiabilityUndiscountedExcessAmountTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeasedPropertyUnderFinanceLease" name="LeasedPropertyUnderFinanceLease" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LeaseholdImprovementsRequiredToBeMadePerYear" name="LeaseholdImprovementsRequiredToBeMadePerYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LesseeFinanceLeaseAnnualRent" name="LesseeFinanceLeaseAnnualRent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LesseeFinancingLeaseAssetsAndLiabilitiesTableTextBlock" name="LesseeFinancingLeaseAssetsAndLiabilitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_LesseeLeaseLiabilityPaymentsDueAfterYearFive" name="LesseeLeaseLiabilityPaymentsDueAfterYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LesseeLeaseLiabilityPaymentsDueNextTwelveMonths" name="LesseeLeaseLiabilityPaymentsDueNextTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LesseeLeaseLiabilityPaymentsDueYearFiveTotal" name="LesseeLeaseLiabilityPaymentsDueYearFiveTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LesseeOperatingAndFinancingLeasesTextBlock" name="LesseeOperatingAndFinancingLeasesTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_LesseeOperatingLeaseAssetsAndLiabilitiesTableTextBlock" name="LesseeOperatingLeaseAssetsAndLiabilitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_LineOfCreditFacilityAmountsInExcessOfSubjectToBorrowingBase" name="LineOfCreditFacilityAmountsInExcessOfSubjectToBorrowingBase" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LongTermDebtGrossCurrentMaturities" name="LongTermDebtGrossCurrentMaturities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_LongTermDebtGrossNoncurrent" name="LongTermDebtGrossNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="awx_ManagementAndAccreditedInvestorsMember" name="ManagementAndAccreditedInvestorsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_MembershipAgreementTerm" name="MembershipAgreementTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_MembershipDuesMember" name="MembershipDuesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_MercerCountyStateBankMember" name="MercerCountyStateBankMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_MinimumPercentageOfFairMarketValueForIncentiveStockOptionPrice" name="MinimumPercentageOfFairMarketValueForIncentiveStockOptionPrice" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_MinimumPercentageOfFairMarketValueForNonQualifiedStockOptionPrice" name="MinimumPercentageOfFairMarketValueForNonQualifiedStockOptionPrice" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_NewCastleCountryClubCommercialMortgageMember" name="NewCastleCountryClubCommercialMortgageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_NewTermLoanAgreementMember" name="NewTermLoanAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_NonCashOperatingAndFinancingActivitiesAbstract" name="NonCashOperatingAndFinancingActivitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_NumberOfConsecutiveRenewalTermOptions" name="NumberOfConsecutiveRenewalTermOptions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:positiveIntegerItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_NumberOfGolfCourses" name="NumberOfGolfCourses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_NumberOfMajorCustomers" name="NumberOfMajorCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_NumberOfSuspendedSaltwaterInjectionWells" name="NumberOfSuspendedSaltwaterInjectionWells" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element id="awx_NumberOfYearsAfterOptionsVestedStockPriceReachPredeterminedVestingPrice" name="NumberOfYearsAfterOptionsVestedStockPriceReachPredeterminedVestingPrice" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_OneCustomerMember" name="OneCustomerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_OtherEmployeesMember" name="OtherEmployeesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_OtherRevenueMember" name="OtherRevenueMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_OwnershipPercentage" name="OwnershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="awx_PaycheckProtectionProgramCaresActMember" name="PaycheckProtectionProgramCaresActMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_PredeterminedVestingPrice" name="PredeterminedVestingPrice" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element id="awx_PropertyUnderFinanceLeaseAccumulatedAmortization" name="PropertyUnderFinanceLeaseAccumulatedAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="awx_RevenueFromContractWithCustomerExcludingAssessedTaxPercentage" name="RevenueFromContractWithCustomerExcludingAssessedTaxPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_RoomRentalMember" name="RoomRentalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_SalesRevenueNetToExternalCustomersMember" name="SalesRevenueNetToExternalCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_SaltWaterInjectionOperationsMember" name="SaltWaterInjectionOperationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_ScheduleOfCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsTableTextBlock" name="ScheduleOfCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_ScheduleOfPeriodAndPredeterminedStockPriceNeededForVestingTableTextBlock" name="ScheduleOfPeriodAndPredeterminedStockPriceNeededForVestingTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element id="awx_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageExercisePrice" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageExercisePrice" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="awx_SharebasedCompensationAwardTrancheFiveMember" name="SharebasedCompensationAwardTrancheFiveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_SharebasedCompensationAwardTrancheFourMember" name="SharebasedCompensationAwardTrancheFourMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_SignificantNonCashOperatingAndInvestingActivitiesAbstract" name="SignificantNonCashOperatingAndInvestingActivitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_StockOptionsBeginsVestingPeriodDescription" name="StockOptionsBeginsVestingPeriodDescription" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_StockOptionsEndsVestingPeriodDescription" name="StockOptionsEndsVestingPeriodDescription" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_SuspendedInjectionWellCostsDisclosureTextBlock" name="SuspendedInjectionWellCostsDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_TenPercentShareholdersMember" name="TenPercentShareholdersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_TennisLessonsMember" name="TennisLessonsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_TermLoanAgreementMember" name="TermLoanAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_The2019LongtermIncentivePlanMember" name="The2019LongtermIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_TheLineOfCreditAgreementMember" name="TheLineOfCreditAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_WasteBrokerageAndManagementServicesMember" name="WasteBrokerageAndManagementServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_WasteManagementServicesMember" name="WasteManagementServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="awx_WeightedAverageNumberOfSharesOutstandingAssumingDilution" name="WeightedAverageNumberOfSharesOutstandingAssumingDilution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-10-term-loans-and-line-of-credit-agreements-future-maturities-of-longterm-debt-details" name="statement-statement-note-10-term-loans-and-line-of-credit-agreements-future-maturities-of-longterm-debt-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-10-term-loans-and-line-of-credit-agreements-summary-of-term-loan-and-line-of-credit-agreements-details" name="statement-statement-note-10-term-loans-and-line-of-credit-agreements-summary-of-term-loan-and-line-of-credit-agreements-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-10-term-loans-and-line-of-credit-agreements-tables" name="statement-statement-note-10-term-loans-and-line-of-credit-agreements-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-12-longterm-incentive-plan-period-and-predetermined-stock-price-needed-for-vesting-details" name="statement-statement-note-12-longterm-incentive-plan-period-and-predetermined-stock-price-needed-for-vesting-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-12-longterm-incentive-plan-stock-option-activity-details" name="statement-statement-note-12-longterm-incentive-plan-stock-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-12-longterm-incentive-plan-tables" name="statement-statement-note-12-longterm-incentive-plan-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-14-business-segment-information-segment-reporting-information-details" name="statement-statement-note-14-business-segment-information-segment-reporting-information-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-14-business-segment-information-tables" name="statement-statement-note-14-business-segment-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-5-cash-cash-equivalents-and-restricted-cash-cash-cash-equivalents-and-restricted-cash-details" name="statement-statement-note-5-cash-cash-equivalents-and-restricted-cash-cash-cash-equivalents-and-restricted-cash-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-5-cash-cash-equivalents-and-restricted-cash-tables" name="statement-statement-note-5-cash-cash-equivalents-and-restricted-cash-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-6-revenues-allowance-for-doubtful-accounts-details" name="statement-statement-note-6-revenues-allowance-for-doubtful-accounts-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-6-revenues-contract-assets-and-liabilities-details" name="statement-statement-note-6-revenues-contract-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-6-revenues-disaggregation-of-revenue-details" name="statement-statement-note-6-revenues-disaggregation-of-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-6-revenues-tables" name="statement-statement-note-6-revenues-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-7-property-and-equipment-summary-of-property-and-equipment-details" name="statement-statement-note-7-property-and-equipment-summary-of-property-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-7-property-and-equipment-tables" name="statement-statement-note-7-property-and-equipment-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-8-leases-financing-leases-assets-and-liabilities-details" name="statement-statement-note-8-leases-financing-leases-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-8-leases-future-commitments-under-longterm-leases-details" name="statement-statement-note-8-leases-future-commitments-under-longterm-leases-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-8-leases-lease-cost-details" name="statement-statement-note-8-leases-lease-cost-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-8-leases-operating-leases-assets-and-liabilities-details" name="statement-statement-note-8-leases-operating-leases-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="awx_statement-statement-note-8-leases-tables" name="statement-statement-note-8-leases-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
