﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2025v4.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2026-02-01T05:52:06-06:00</ReturnTs>
    <TaxPeriodEndDt>2025-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>824694794</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Feinberg Financial LLC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>133 Apple Blossom Way</AddressLine1Txt>
        <CityNm>Gaithersburg</CityNm>
        <StateAbbreviationCd>MD</StateAbbreviationCd>
        <ZIPCd>20878</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2025-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>475465961</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>CSH2O Charitable Foundation</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>Corporation</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>CSH2</BusinessNameControlTxt>
      <PhoneNum>4102994322</PhoneNum>
      <USAddress>
        <AddressLine1Txt>1491 Westcliff Drive</AddressLine1Txt>
        <CityNm>Pasadena</CityNm>
        <StateAbbreviationCd>MD</StateAbbreviationCd>
        <ZIPCd>21122</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Martin Bentz</PersonNm>
      <PersonTitleTxt>President</PersonTitleTxt>
      <PhoneNum>4102994322</PhoneNum>
      <SignatureDt>2026-02-01</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>Jeremy Feinberg</PreparerPersonNm>
      <PTIN>P01249400</PTIN>
      <PhoneNum>2402715515</PhoneNum>
      <PreparationDt>2026-02-01</PreparationDt>
      <SelfEmployedInd>X</SelfEmployedInd>
    </PreparerPersonGrp>
    <TaxYr>2025</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="6">
    <IRS990EZ documentId="RetDoc1234200001" referenceDocumentId="RetDoc1051800001 RetDoc2278000001">
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <WebsiteAddressTxt>www.csh2o.org</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="RetDoc1039100001">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>112586</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>39462</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>4075</ProgramServiceRevenueAmt>
      <FundraisingGrossIncomeAmt referenceDocumentId="RetDoc1041200001">69049</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>75089</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>-6040</SpecialEventsNetIncomeLossAmt>
      <TotalRevenueAmt>37497</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>3000</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>36541</FeesAndOtherPymtToIndCntrctAmt>
      <OtherExpensesTotalAmt>9032</OtherExpensesTotalAmt>
      <TotalExpensesAmt>48573</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-11076</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>82051</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>70975</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>81129</BOYAmt>
        <EOYAmt>70325</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>1450</BOYAmt>
        <EOYAmt>650</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>82579</BOYAmt>
        <EOYAmt>70975</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>528</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>82051</BOYAmt>
        <EOYAmt>70975</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>The Organization creates and offers hands-on programs and experiences for the community and youth that are designed to inspire a passion for Maryland's waterways, and connect them with one of the State's most cherished resources.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>The Organization provides Oyster &amp; Environmental Education lessons to schools and communities in several counties in Maryland. These authentic programs and experiences are designed to inspire a passion to preserve and protect Maryland's waterways. We believe that environmental stewardship is a lifelong pursuit that starts with providing education at a young age to help students understand their impact on the environment and instill a lifetime of respect for our waterways. In 2025, we provided programs to 235 classrooms/community events and reached 6,250 students.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>12500</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>30074</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>The Organization updates and enhances its environmental curriculum to keep it current and relevant. In 2025, we developed and implemented a new program, "Green Guardians-Keeping Your Schoolyard &amp; Community Clean" that encourages students to take action to protect the environment and to see their connection to the natural world.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>7518</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Organization provides scholarships to students at local schools. Scholarships are awarded to high school students to continue their environmental education in college.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>3000</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>40592</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Martin Bentz</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.50</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Nichole Bentz</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>25.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Sandy Gedeik</PersonNm>
        <TitleTxt>Secretary &amp; Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>MD</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>The Organization</BusinessNameLine1Txt>
        </BusinessName>
        <USAddress>
          <AddressLine1Txt>1491 Westcliff Drive</AddressLine1Txt>
          <CityNm>Pasadena</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>21122</ZIPCd>
        </USAddress>
        <PhoneNum>4102994322</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>1</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>53438</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>30988</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>24420</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>36739</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>43537</CurrentTaxYearAmt>
        <TotalAmt>189122</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>14099</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>38715</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>107673</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>107754</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>69049</CurrentTaxYearAmt>
        <TotalAmt>337290</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>67537</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>69703</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>132093</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>144493</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>112586</CurrentTaxYearAmt>
        <TotalAmt>526412</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <CurrentTaxYearMinus4YearsAmt>1752</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>11825</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>19331</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>34789</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>36200</CurrentTaxYearAmt>
        <TotalAmt>103897</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <TotalAmt>0</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp>
        <CurrentTaxYearMinus4YearsAmt>1752</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>11825</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>19331</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>34789</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>36200</CurrentTaxYearAmt>
        <TotalAmt>103897</TotalAmt>
      </SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>422515</PublicSupportTotal509Amt>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>67537</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>69703</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>132093</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>144493</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>112586</CurrentTaxYearAmt>
        <TotalAmt>526412</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.80260</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.84660</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00000</InvestmentIncomeCYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleG documentId="RetDoc1041200001">
      <SpecialFundraisingEventsInd>X</SpecialFundraisingEventsInd>
      <AgrmtProfFundraisingActyInd>0</AgrmtProfFundraisingActyInd>
      <FundraisingEventInformationGrp>
        <Event1Nm>Bay Bells and Shark Tails</Event1Nm>
        <GrossReceiptsEvent1Amt>69049</GrossReceiptsEvent1Amt>
        <GrossRevenueEvent1Amt>69049</GrossRevenueEvent1Amt>
        <RentFacilityCostsEvent1Amt>75089</RentFacilityCostsEvent1Amt>
        <OtherEventsTotalCnt>1</OtherEventsTotalCnt>
        <GrossReceiptsTotalAmt>69049</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>69049</GrossRevenueTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>75089</RentFcltyCostsTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>75089</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>-6040</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="RetDoc1051800001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 10 - Grants and Similar Amounts Paid</FormAndLineReferenceDesc>
        <ExplanationTxt>Activity Classification: Environmental education support. Grantee Name: Lisa Van Wormer. Grantee Relationship: No relationship. Property Description: Cash. Date of Gift: 05/20/25. Amount Given: 250.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 10 - Grants and Similar Amounts Paid</FormAndLineReferenceDesc>
        <ExplanationTxt>Activity Classification: Environmental education support. Grantee Name: McKenzie Hauptman. Grantee Relationship: No relationship. Property Description: Cash. Date of Gift: 05/28/25. Amount Given: 250.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 10 - Grants and Similar Amounts Paid</FormAndLineReferenceDesc>
        <ExplanationTxt>Activity Classification: Student scholarship. Grantee Name: James Obasiolu. Grantee Relationship: No relationship. Property Description: Cash. Date of Gift: 06/02/25. Amount Given: 2,500. Total included on Form 990-EZ, line 10: 3,000.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16 - Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Description: Bank fees. Amount: 669. Description: Credit card fees. Amount: 742. Description: Insurance. Amount: 1,621. Description: Miscellaneous. Amount: 1,213. Description: Computer and internet expenses. Amount: 3,915. Description: Advertising. Amount: 700. Description: Travel. Amount: 76. Description: Marketing. Amount: 96. Total to Form 990-EZ, line 16: 9,032.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 24 - Other Assets</FormAndLineReferenceDesc>
        <ExplanationTxt>Description: Contributions receivable. Beg. of Year Amount: 1,450. End of Year Amount: 650.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 26 - Other Liabilities</FormAndLineReferenceDesc>
        <ExplanationTxt>Description: Accounts payable. Beg. of Year Amount: 528. End of Year Amount: 0.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <TransferPrsnlBnftContractsDecl documentId="RetDoc2278000001">
      <DeclarationDesc>The organization did not, during the year, receive any funds, directly,or indirectly, to pay premiums on a personal benefit contract.The organization, did not, during the year, pay any premiums, directly,or indirectly, on a personal benefit contract.</DeclarationDesc>
    </TransferPrsnlBnftContractsDecl>
  </ReturnData>
</Return>