<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001861377</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000933972</issuerCik>
      <issuerName>374Water Inc.</issuerName>
      <secFileNumber>001-41420</secFileNumber>
      <issuerAddress>
        <com:street1>701 W. MAIN STREET</com:street1>
        <com:street2>SUITE 410</com:street2>
        <com:city>DURHAM</com:city>
        <com:stateOrCountry>NC</com:stateOrCountry>
        <com:zipCode>27701</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>440-609-9677</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Nagar Yaacov</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Edward Jones</name>
        <address>
          <com:street1>201 Progress Parkway</com:street1>
          <com:city>Maryland Heights </com:city>
          <com:stateOrCountry>MO</com:stateOrCountry>
          <com:zipCode>63043</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1500000</noOfUnitsSold>
      <aggregateMarketValue>525000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>152781547</noOfUnitsOutstanding>
      <approxSaleDate>09/16/2025</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>04/16/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Business Combination</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>374 Water/Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1500000</amountOfSecuritiesAcquired>
      <paymentDate>04/16/2021</paymentDate>
      <natureOfPayment>Asset Exchange</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>YAACOV NAGAR </name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>06/16/2025</saleDate>
      <amountOfSecuritiesSold>6052</amountOfSecuritiesSold>
      <grossProceeds>2420.80</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>YAACOV NAGAR</name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300,</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>06/18/2025</saleDate>
      <amountOfSecuritiesSold>51598</amountOfSecuritiesSold>
      <grossProceeds>20742.38</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>YAACOV NAGAR</name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300,</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>06/23/2025</saleDate>
      <amountOfSecuritiesSold>36191</amountOfSecuritiesSold>
      <grossProceeds>15308.79</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>YAACOV NAGAR</name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300,,</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>06/24/2025</saleDate>
      <amountOfSecuritiesSold>59946</amountOfSecuritiesSold>
      <grossProceeds>25321.19</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name> YAACOV NAGAR</name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>06/26/2025</saleDate>
      <amountOfSecuritiesSold>103379</amountOfSecuritiesSold>
      <grossProceeds>43491.55</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name> YAACOV NAGAR</name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>06/27/2025</saleDate>
      <amountOfSecuritiesSold>23396</amountOfSecuritiesSold>
      <grossProceeds>9828.10</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>YAACOV NAGAR</name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>08/29/2025</saleDate>
      <amountOfSecuritiesSold>22711</amountOfSecuritiesSold>
      <grossProceeds>8857.29</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>YAACOV NAGAR</name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/05/2025</saleDate>
      <amountOfSecuritiesSold>122439</amountOfSecuritiesSold>
      <grossProceeds>48090.23</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>YAACOV NAGAR</name>
        <address>
          <com:street1>600 PARK OFFICES DR SUITE 300</com:street1>
          <com:city>Durham</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27709</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/08/2025</saleDate>
      <amountOfSecuritiesSold>54850</amountOfSecuritiesSold>
      <grossProceeds>21899.39</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>09/16/2025</noticeDate>
      <signature>Annie Mechlin</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
