<?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>10% Stockholder</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>245 Summer Street</com:street1>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>2000000</noOfUnitsSold>
      <aggregateMarketValue>1380000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>151028287</noOfUnitsOutstanding>
      <approxSaleDate>10/14/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>04/16/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Merger/Acquisition</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>2000000</amountOfSecuritiesAcquired>
      <paymentDate>04/16/2021</paymentDate>
      <natureOfPayment>Not Applicable</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Yaacov Nagar</name>
        <address>
          <com:street1>100 southcenter Court, Suite 200</com:street1>
          <com:city>Morrisville</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27560</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>100 southcenter Court, Suite 200</com:street1>
          <com:city>Morrisville</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27560</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>100 southcenter Court, Suite 200</com:street1>
          <com:city>Morrisville</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27560</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>09/08/2025</saleDate>
      <amountOfSecuritiesSold>54850</amountOfSecuritiesSold>
      <grossProceeds>21899.39</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Yaacov Nagar</name>
        <address>
          <com:street1>100 southcenter Court, Suite 200</com:street1>
          <com:city>Morrisville</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27560</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>10/07/2025</saleDate>
      <amountOfSecuritiesSold>1000</amountOfSecuritiesSold>
      <grossProceeds>390.00</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Yaacov Nagar</name>
        <address>
          <com:street1>100 southcenter Court, Suite 200</com:street1>
          <com:city>Morrisville</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27560</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>10/08/2025</saleDate>
      <amountOfSecuritiesSold>1552304</amountOfSecuritiesSold>
      <grossProceeds>721472.96</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>10/14/2025</noticeDate>
      <signature>/s/ Christian Nasser as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Yaacov Nagar</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
