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        <name>Mueller Water Products Inc</name>
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        <name>Cia de Saneamento Basico do Es</name>
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        <name>Morgan Stanley Institutional Liquidity Funds - Treasury Portfolio</name>
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        <name>Gorman-Rupp Co/The</name>
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        <name>American States Water Co</name>
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        <pctVal>2.455885267462</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Evoqua Water Technologies Corp</name>
        <lei>529900YQAOMEZRGRRP43</lei>
        <title>Evoqua Water Technologies Corp</title>
        <cusip>30057T105</cusip>
        <identifiers>
          <isin value="US30057T1051"/>
          <ticker value="AQUA"/>
        </identifiers>
        <balance>677309.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>7592633.89000000</valUSD>
        <pctVal>1.716203390895</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>American Water Works Co Inc</name>
        <lei>549300DXHIJQMD5WFW18</lei>
        <title>American Water Works Co Inc</title>
        <cusip>030420103</cusip>
        <identifiers>
          <isin value="US0304201033"/>
          <ticker value="AWK"/>
        </identifiers>
        <balance>164486.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>19665946.16000000</valUSD>
        <pctVal>4.445198329581</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Tetra Tech Inc</name>
        <lei>549300UJ1LP7JGJC5P32</lei>
        <title>Tetra Tech Inc</title>
        <cusip>88162G103</cusip>
        <identifiers>
          <isin value="US88162G1031"/>
          <ticker value="TTEK"/>
        </identifiers>
        <balance>225895.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>15952704.90000000</valUSD>
        <pctVal>3.605874672738</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>IDEX Corp</name>
        <lei>549300U5Y5EL6PHYLF13</lei>
        <title>IDEX Corp</title>
        <cusip>45167R104</cusip>
        <identifiers>
          <isin value="US45167R1041"/>
          <ticker value="IEX"/>
        </identifiers>
        <balance>127147.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>17560272.17000000</valUSD>
        <pctVal>3.969241646550</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Ecolab Inc</name>
        <lei>82DYEISM090VG8LTLS26</lei>
        <title>Ecolab Inc</title>
        <cusip>278865100</cusip>
        <identifiers>
          <isin value="US2788651006"/>
          <ticker value="ECL"/>
        </identifiers>
        <balance>101509.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>15818147.47000000</valUSD>
        <pctVal>3.575459941700</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>
        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2020-05-22</ncom:dateSigned>
      <ncom:nameOfApplicant>First Trust Exchange-Traded Fund</ncom:nameOfApplicant>
      <ncom:signature>Donald P. Swade</ncom:signature>
      <ncom:signerName>Donald P. Swade</ncom:signerName>
      <ncom:title>Treasurer, Chief Financial Officer and Chief Accounting Officer</ncom:title>
    </signature>
  </formData>
  <documents>XXXX</documents>
</edgarSubmission>
