﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2024v5.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2025-07-24T10:21:46-04:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>061026978</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>DON BROOKS &amp; ASSOCIATES INC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>POST OFFICE BOX 605</AddressLine1Txt>
        <CityNm>SOUTH WINDSOR</CityNm>
        <StateAbbreviationCd>CT</StateAbbreviationCd>
        <ZIPCd>06074</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>042320822</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>THE CONNECTICUT VALLEY LOCAL SECTIO</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>OF THE AMERICAN CHEMICAL SOCIETY</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>CONN</BusinessNameControlTxt>
      <PhoneNum>8602980580</PhoneNum>
      <USAddress>
        <AddressLine1Txt>29 FARMSTEAD LANE</AddressLine1Txt>
        <CityNm>WINDSOR</CityNm>
        <StateAbbreviationCd>CT</StateAbbreviationCd>
        <ZIPCd>06095</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>ELLEN ANDERSON</PersonNm>
      <PersonTitleTxt>TREASURER</PersonTitleTxt>
      <PhoneNum>8602980580</PhoneNum>
      <SignatureDt>2025-07-17</SignatureDt>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>PAMELA J GUENARD</PreparerPersonNm>
      <PTIN>P01315014</PTIN>
      <PhoneNum>8606484002</PhoneNum>
      <PreparationDt>2025-07-24</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="RetDoc2" referenceDocumentId="RetDoc3">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <WebsiteAddressTxt>WWW.CVS-ACS.ORG</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="RetDoc4">X</Organization501c3Ind>
      <TypeOfOrganizationOtherInd>X</TypeOfOrganizationOtherInd>
      <TypeOfOrganizationOtherDesc>NONPROFIT</TypeOfOrganizationOtherDesc>
      <GrossReceiptsAmt>57620</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>34422</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>3310</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>5590</MembershipDuesAmt>
      <InvestmentIncomeAmt>12008</InvestmentIncomeAmt>
      <OtherRevenueTotalAmt>2290</OtherRevenueTotalAmt>
      <TotalRevenueAmt>57620</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>37981</GrantsAndSimilarAmountsPaidAmt>
      <PrintingPublicationsPostageAmt>219</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>29121</OtherExpensesTotalAmt>
      <TotalExpensesAmt>67321</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-9701</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>273875</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>264174</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>273875</BOYAmt>
        <EOYAmt>264174</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>273875</BOYAmt>
        <EOYAmt>264174</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>273875</BOYAmt>
        <EOYAmt>264174</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>EDUCATIONAL SUPPORT FOR CHEMISTRY STUDENTS AND PROFESSIONALS.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>50 RECIPIENTS: AWARDS TO UNDERGRADUATE AND GRADUATE CHEMISTRY AND BIOCHEMISTRY STUDENTS, HIGH SCHOOL STUDENTS, CHEMISTRY TEACHERS, CHEMISTRY PROFESSIONALS.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>37981</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>37981</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>250 RECIPIENTS: EXPENSES FOR THE CHEMISTRY OLYMPIAD, THE UNDERGRADUATE RESEARCH SYMPOSIUM, AND NATIONAL CHEMISTRY MATERIALS.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>9033</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>150 RECIPIENTS: SUPPORT FOR THE PFIZER ORGANIC SYNTHESIS SYMPOSIUM</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>8547</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>55561</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>REBECCA LUCHT</PersonNm>
        <TitleTxt>CHAIR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>AMELY CROSS</PersonNm>
        <TitleTxt>CHAIR-ELECT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ELLEN ANDERSON</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ALFREDO ANGELS-BOZA</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>ELLEN ANDERSON</PersonNm>
        <USAddress>
          <AddressLine1Txt>29 FARMSTEAD LANE</AddressLine1Txt>
          <CityNm>WINDSOR</CityNm>
          <StateAbbreviationCd>CT</StateAbbreviationCd>
          <ZIPCd>06095</ZIPCd>
        </USAddress>
        <PhoneNum>8602980580</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="RetDoc4">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>36898</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>37878</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>31101</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>36458</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>40012</CurrentTaxYearAmt>
        <TotalAmt>182347</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>223</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus1YearAmt>2591</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>5050</CurrentTaxYearAmt>
        <TotalAmt>7864</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>37121</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>37878</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>31101</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>39049</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>45062</CurrentTaxYearAmt>
        <TotalAmt>190211</TotalAmt>
      </Total509Grp>
      <PublicSupportTotal509Amt>190211</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>4594</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>4598</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>5191</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>6806</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>8101</CurrentTaxYearAmt>
        <TotalAmt>29290</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>4594</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>4598</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>5191</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>6806</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>8101</CurrentTaxYearAmt>
        <TotalAmt>29290</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>41715</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>42476</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>36292</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>45855</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>53163</CurrentTaxYearAmt>
        <TotalAmt>219501</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.86660</PublicSupportCY509Pct>
      <InvestmentIncomeCYPct>0.13000</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00000</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1">
      <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>
    <IRS990ScheduleO documentId="RetDoc3">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 8</FormAndLineReferenceDesc>
        <ExplanationTxt>OLYMPIAD 1,740 UNCASHED CHECKS FROM 2022 550 TOTAL 2,290</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 10</FormAndLineReferenceDesc>
        <ExplanationTxt>CASH CONTRIBUTION: 37,981</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16</FormAndLineReferenceDesc>
        <ExplanationTxt>EXPENSES AWARDS 9,033 AWARDS 8,547 MEETING EXPENSES 1,896 ADMISTRATION COSTS 481 GIVE AWAYS 2,656 STRATEGIC PLANNING RETREA 6,508 TOTAL 29,121</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>