Liabilities / Assets
25th percentile
Higher debt load relative to assets than 25% of similar nonprofits.
EIN 20-1941686 • 501(c)3 • Boston, MA
Profile
To promote the public health, safety, convenience, and welfare by monitoring groundwater levels and making recommendations to raise, restore, or protect the water table in areas where it is low to protect wood pile and other types of foundations.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
25th percentile
Higher debt load relative to assets than 25% of similar nonprofits.
Liabilities / Revenue
30th percentile
Higher debt load relative to revenue than 30% of similar nonprofits.
Net Margin
71st percentile
Higher net margin than 71% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
53rd percentile
Faster asset growth than 53% of similar nonprofits.
Revenue Growth
33rd percentile
Faster revenue growth than 33% of similar nonprofits.
Assets
Up$1,073,856
Up $49,941 (+4.9%) from 2024
Liabilities
Up$3,186
Up $308 (+11%) from 2024
Net Assets
Up$1,070,670
Up $49,633 (+4.9%) from 2024
Revenue
Down$273,315
Down $3,685 (-1.3%) from 2024
Expenses
Down$223,682
Down $4,077 (-1.8%) from 2024
Net Income
Up$49,633
Up $392 (+0.8%) from 2024
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
The trust was formed pursuant to a city ordinance to monitor and analyze the ground water levels in the city of boston and to lessen the burdens of the government. The trust acts for the benefit of boston generally.
See form 990 part iiithe trust was formed pursuant to a city ordinance to monitor and analyze the ground water levels in the city of boston and to lessen the burdens of the government. The trust acts for the benefit of boston generally.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $760,935 | $549,932 | ▼ $211,003 |
| Savings and Temporary Cash Investments | $113,046 | $350,883 | ▲ $237,837 |
| Cash and Non-Interest-Bearing Accounts | $106,478 | $145,570 | ▲ $39,092 |
| Land, Buildings, and Equipment, Net | $36,166 | $21,700 | ▼ $14,466 |
| Accounts Receivable | $7,290 | $5,771 | ▼ $1,519 |
| Total Assets | $1,023,915 | $1,073,856 | ▲ $49,941 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $2,878 | $3,186 | ▲ $308 |
| Total Liabilities | $2,878 | $3,186 | ▲ $308 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $1,021,037 | $1,070,670 | ▲ $49,633 |
| Total Net Assets Fund Balance | $1,021,037 | $1,070,670 | ▲ $49,633 |
| Total Liabilities and Net Assets / Fund Balance | $1,023,915 | $1,073,856 | ▲ $49,941 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Equipment | $21,700 | $87,650 | $109,350 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Christian Simonelli | Executive Director | FT | $120,120 | $6,000 | $126,120 |
| Name | Title |
|---|---|
| Gary Saunders | Trustee, Co-chair |
| Aaron Michlewitz | Trustee |
| Alice Brown | Trustee |
| Angie Liou | Trustee |
| Beatrice Nessen | Trustee |
| Elliott Laffer | Trustee |
| Henry Vitale | Trustee |
| Kate England | Trustee |
| Peter Shilland | Trustee |
| Sharon Durkan | Trustee |
| Janine Commerford | Trustee, Secretary |
| Robert Whitney | Trustee-treasurer |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $151,199 |
| Other Expenses | $72,483 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Current Officers, Directors, Trustees, and Key Employees | $60,291 | $60,291 | - | $120,582 |
| Occupancy | $13,551 | $4,517 | - | $18,068 |
| Depreciation Depletion | $14,466 | - | - | $14,466 |
| Other Expenses | $14,268 | $14,339 | - | $14,268 |
| Other Employee Benefits | $6,576 | $6,576 | - | $13,152 |
| Payroll Taxes | $5,066 | $5,066 | - | $10,132 |
| Fees for Services Accounting | - | $7,500 | - | $7,500 |
| Other Salaries and Wages | $7,333 | - | - | $7,333 |
| Insurance | - | $1,880 | - | $1,880 |
| Total Functional Expenses | $123,513 | $100,169 | $0 | $223,682 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“Executive director reviews and signs form 990.”
“The co-chairs and executive director meet annually to review performance and compensation for the executive director.”
“Documents are posted for public inspection to the trust's website.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 1 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 2878 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 3186 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 7290 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 5771 |
| IRS990/AcctCompileOrReviewBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | SEE FORM 990 PART IIITHE TRUST WAS FORMED PURSUANT TO A CITY ORDINANCE TO MONITOR AND ANALYZE THE GROUND WATER LEVELS IN THE CITY OF BOSTON AND TO LESSEN THE BURDENS OF THE GOVERNMENT. THE TRUST ACTS FOR THE BENEFIT OF BOSTON GENERALLY. |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 0 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | CHRISTIAN SIMONELLI |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6178599439 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 229 BERKELEY ST SUITE 410 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | BOSTON |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 021163724 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 106478 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 145570 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 60291 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 60291 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 120582 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 248000 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 25315 |
| IRS990/CYOtherExpensesAmt | 0 | 72483 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 49633 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 151199 |
| IRS990/CYTotalExpensesAmt | 0 | 223682 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 273315 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 14466 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 14466 |
| IRS990/Desc | 0 | THE TRUST IS PRIMARILY INVOLVED IN THE SITING, INSTALLING, AND MONITORING OF WELLS ADDRESSING GROUNDWATER LEVELS. THE DATA IS PROVIDED TO THE APPROPRIATE GOVERNMENTAL AGENCIES AND GENERAL PUBLIC. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 0 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 3 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 123513 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 7500 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 7500 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 6000 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | SHARON DURKAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | AARON MICHLEWITZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ANGIE LIOU |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | GARY SAUNDERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | PETER SHILLAND |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JANINE COMMERFORD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | ROBERT WHITNEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | BEATRICE NESSEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ELLIOTT LAFFER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | KATE ENGLAND |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | HENRY VITALE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | ALICE BROWN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | CHRISTIAN SIMONELLI |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 120120 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE, CO-CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE, SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE-TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | EXECUTIVE DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/FormationYr | 0 | 1986 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 12 |
| IRS990/GovernmentGrantsAmt | 0 | 248000 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 205000 |
| IRS990/GrossReceiptsAmt | 0 | 478315 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 12 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 1880 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 1880 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 25315 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 25315 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 760935 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 549932 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 87650 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 36166 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 21700 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 109350 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 205000 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | TO PROMOTE THE PUBLIC HEALTH, SAFETY, CONVENIENCE, AND WELFARE BY MONITORING GROUNDWATER LEVELS AND MAKING RECOMMENDATIONS TO RAISE, RESTORE, OR PROTECT THE WATER TABLE IN AREAS WHERE IT IS LOW TO PROTECT WOOD PILE AND OTHER TYPES OF FOUNDATIONS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1021037 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1070670 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1021037 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1070670 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 4517 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 13551 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 18068 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 6576 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 6576 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 13152 |
| IRS990/OtherExpensesGrp/Desc | 0 | OFFICE AND MISCELLANEOU |
| IRS990/OtherExpensesGrp/Desc | 1 | GROUNDWATER MONITORING |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 14339 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 1962 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 14268 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 16301 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 14268 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 7333 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 7333 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 5066 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 5066 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 10132 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | CHRISTIAN SIMONELLI |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 248000 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 24500 |
| IRS990/PYOtherExpensesAmt | 0 | 75496 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 4500 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 49241 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 152263 |
| IRS990/PYTotalExpensesAmt | 0 | 227759 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 277000 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 49633 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 0 |
| IRS990/RelatedEntityInd | 0 | 1 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 113046 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 350883 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 248000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 248000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 248000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 187373 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 194373 |
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| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 20473 |
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| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 12387 |
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| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.92290 |
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| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 248000 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 248000 |
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| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 194373 |
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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | EXECUTIVE DIRECTOR REVIEWS AND SIGNS FORM 990. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | THE CO-CHAIRS AND EXECUTIVE DIRECTOR MEET ANNUALLY TO REVIEW PERFORMANCE AND COMPENSATION FOR THE EXECUTIVE DIRECTOR. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | DOCUMENTS ARE POSTED FOR PUBLIC INSPECTION TO THE TRUST'S WEBSITE. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 15A |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION C, LINE 19 |
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| IRS990/UponRequestInd | 0 | X |
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| IRS990/VotingMembersIndependentCnt | 0 | 12 |
| IRS990/WebsiteAddressTxt | 0 | WWW.BOSTONGROUNDWATER.ORG |
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| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | 1 |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | CHRISTIAN SIMONELLI |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | EXECUTIVE DIRECTOR |
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| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-09-24 |
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| ReturnHeader/Filer/BusinessNameControlTxt | 0 | BOST |
| ReturnHeader/Filer/EIN | 0 | 201941686 |
| ReturnHeader/Filer/PhoneNum | 0 | 6178598439 |
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