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Nonprofit · EIN 04-3503656

CHARLES RIVER CONSERVANCY INC

Tax-exempt · CAMBRIDGE, MA 02141

Financials

$861K$744K2023$1.1M$1M2024
Revenue Expenses · by fiscal year end
Financials of CHARLES RIVER CONSERVANCY INC by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
September 30, 2025990$1,056,299$1,001,696$54,603$1,439,361$111,204$1,328,157
September 30, 2024990$860,818$744,218$116,600$1,353,155$144,472$1,208,683
Financial details: 990 for the year ended September 30, 2025

Revenue

Contributions, gifts and grants
$1,034,807
of which government grants
$77,000
Program service revenue
$0
Investment income
$21,492
Net gain from sales of assets
$13,269
Other revenue
$0

Expenses

Grants and similar amounts paid
$0
Other salaries and wages
$562,064
Salaries, compensation and benefits (total)
$653,135
Professional fundraising fees
$0
Accounting fees
$13,067
Occupancy
$57,769
Depreciation
$2,400
Program services (functional)
$650,632
Management and general (functional)
$203,124
Fundraising (functional)
$147,940

Balance sheet and other

Total assets, start of year
$1,353,155
Total assets, end of year
$1,439,361
Total liabilities, end of year
$111,204
Net assets, end of year
$1,328,157
Land, buildings and equipment
$21,897
Publicly traded securities
$905,578
Net assets without donor restrictions
$1,316,199
Net assets with donor restrictions
$11,958
Gross receipts
$1,238,311
Employees
10
Volunteers
2,250
Year formed
2000
State of legal domicile
MA

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended September 30, 2025, highest compensation first.

NameTitleHours / weekCompensation
LAURA JASINSKIEXECUTIVE DI
Highest-paid employee
37.5$165,476
LONSDALE G KOESTERCHAIR
Trustee or director, Officer
4$0
CRAIG BIDADIRECTOR
Trustee or director
1$0
NATHAN GAUTHIERDIRECTOR
Trustee or director
1$0
FRANS LAWAETZTREASURER
Trustee or director, Officer
4$0
BONNIE L MCLELLANDIRECTOR
Trustee or director
1$0
SIMEEN ALI MOHSENDIRECTOR
Trustee or director
1$0
NAYELI RODRIGUEZDIRECTOR
Trustee or director
1$0
LAUREL SCHWABCLERK
Trustee or director, Officer
1$0
GAUTAM SUNDARAMDIRECTOR
Trustee or director
1$0
990 for the year ended September 30, 2024: 11 people
NameTitleHours / weekCompensation
LAURA JASINSKIEXECUTIVE DI
Highest-paid employee
37.5$104,907
LONSDALE G KOESTERCHAIR
Trustee or director, Officer
4$0
CRAIG BIDADIRECTOR
Trustee or director
1$0
NATHAN GAUTHIERDIRECTOR
Trustee or director
1$0
FRANS LAWAETZTREASURER
Trustee or director, Officer
4$0
BONNIE L MCLELLANDIRECTOR
Trustee or director
1$0
SIMEEN ALI MOHSENDIRECTOR
Trustee or director
1$0
NAYELI RODRIGUEZDIRECTOR
Trustee or director
1$0
LAUREL SCHWABCLERK
Trustee or director, Officer
1$0
GAUTAM SUNDARAMDIRECTOR
Trustee or director
1$0
ALANA OLSEN WESTWATERDIRECTOR
Trustee or director
1$0

Address and contacts

Address (IRS master file)
43 THORNDIKE ST S3-3, CAMBRIDGE, MA 02141-1764
Principal officer (990 for 2024)
LAURA JASINSKI, 43 THORNDIKE ST S3-3, CAMBRIDGE, MA 02141
Signed the 990
LAURA JASINSKI, EXECUTIVE DIRECTOR
Phone
(617) 608-1410
Return prepared by
BACALLCONNIFF INC

Mission

THE CONSERVANCY WORKS TO AMPLIFY COMMUNITY VOICE AND CATALYZE BOLD SOLUTIONS, TO MAKE THE LOWER CHARLES RIVER AND ITS PARKS MORE VIBRANT, HEALTHY AND WELCOMING NOW AND IN THE FUTURE. OUR WORKS ALIGNS WITH 3 "C"S: CONNECT ORGANIZATIONS, PEOPLE AND COMMUNITIES TO EACH OTHER AND THE RIVER AND ITS PARKS. CREATE BOLD, IMPACTFUL SOLUTIONS THAT ELEVATE AND STRENGTHEN THE RIVER AND ITS PARKS AS AN ESSENTIAL ECOLOGICAL FOUNDATION AND CULTURAL ASSET FOR GREATER BOSTON. CELEBRATE THE RIVER AND ITS PARKS AND THE INTERSECTION OF PEOPLE AND NATURE TO INSPIRE INVOLVEMENT.

990 for the year ended September 30, 2025

Program accomplishments

  • CONSERVANCY VOLUNTEERS - THIS PROGRAM ORGANIZES APPROXIMATELY 2,000 VOLUNTEERS ANNUALLY TO STEWARD THE CHARLES RIVER RESERVATION. PROJECTS INCLUDE INVASIVE SPECIES MANAGEMENT AND PLANTING OF NATIVE SPECIES (TO BOTH ADDRESS EROSION AND SUPPORT BIODIVERSITY), LITTER REMOVAL (TO SUPPORT A HEALTHIER ECOSYSTEM),LEAF REMOVAL (TO ADDRESS NUTRIENT POLLUTION) AND PAINTING OF BENCHES AND RAILINGS (TO INCREASE THE LIFE OF PARK INFRASTRUCTURE).
    Expenses $122,541
  • CHARLES RIVER FLOATING WETLAND - THROUGH THE INSTALLATION AND MAINTENANCE OF A HUMAN-MADE ISLAND OF WETLAND PLANTS, THIS PROJECT IS EXPANDING THE TOOLS AVAILABLE TO SUPPORT A RESILIENT URBAN RIVER AND IS INCREASING THE COMMUNITY'S UNDERSTANDING OF LOCAL ECOSYSTEMS. THROUGH RESEARCH THAT HAS INCLUDED 3 YEARS OF WATER QUALITY MONITORING AND A FISH CAMERA, THIS FLOATING WETLAND IS PROVIDING INSIGHTS INTO HOW THESE INSTALLATIONS CAN BENEFIT AQUATIC ECOSYSTEMS. THROUGH YOUTH PROGRAMMING AND COMMUNITY OUTREACH, INCLUDING BUILD-YOUR-OWN-WETLAND KITS AND KAYAK TOURS, THE PROJECT IS ALSO A PLATFORM FOR EXPERIENTAL ENVIRONMENTAL EDUCATION.
    Expenses $62,815
  • LYNCH FAMILY SKATEPARK ART PROGRAM - AFTER LEADING THE DESIGN AND CONSTRUCTION OF THE LYNCH FAMILY SKATEPARK (WHICH OPENED IN 2015 AND IS NOW OWNED AND MANAGED BY THE STATE), THE CRC HAS EMBARKED ON A COMMUNITY-LED DESIGN PROCESS TO SUPPORT THE SOCIAL AND PHYSICAL INFRASTRUCTURE OF THE PARK, WHICH WILL CULMINATE IN PUBLIC ARTWORK THAT CELEBRATES PARK USERS AND INVITES NEW AUDIENCES TO THE RIVERFRONT.
    Expenses $148,856
  • ALL OTHER PROGRAMS - THE CHARLES RIVER CONSERVANCY STRIVES TO MAKE THE CHARLES RIVER AND ITS PARKS A WELL-MAINTAINED NETWORK OF NATURAL URBAN PLACES THAT INVITE AND ENGAGE ALL IN THEIR USE AND STEWARDSHIP. IN ADDITION TO THE PROGRAMS DISCUSSED IN 4A-C, OUR WORK SEEKS TO INCREASE ENGAGEMENT WITH, ACCESS TO AND UNDERSTANDING OF THESE PUBLIC NATURAL RESOURCES THROUGH A VARIETY OF OTHER PROGRAMMING, ADVOCACY AND OUTREACH.
    Expenses $316,420

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in September, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025September 30, 2026February 15, 2027Not due yet
2024September 30, 2025February 16, 2026990 on file
2023September 30, 2024February 17, 2025990 on file

IRS record

EIN
04-3503656
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2000
Accounting year ends
September
Files
Form 990 or 990-EZ
Category (NTEE)
Environment (C32)
Assets (IRS master file)
$1,439,361
Income (IRS master file)
$1,238,311

Filing history

FormYear endedRevenueExpensesAssetsReturn
990September 2025$1,056,299$1,001,696$1,439,361XML
990September 2024$860,818$744,218$1,353,155XML
990September 2023$665,272$708,732$1,057,222IRS
990September 2022$794,079$693,254$1,064,235IRS
990September 2021–––IRS
990September 2020–––IRS
990September 2019–––IRS
990September 2018–––IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 04-3503656).

Questions about CHARLES RIVER CONSERVANCY INC

What is the EIN of CHARLES RIVER CONSERVANCY INC?
The employer identification number (EIN) of CHARLES RIVER CONSERVANCY INC is 04-3503656.
Is CHARLES RIVER CONSERVANCY INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2000.
Are donations to CHARLES RIVER CONSERVANCY INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does CHARLES RIVER CONSERVANCY INC file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of CHARLES RIVER CONSERVANCY INC due?
The return for tax year 2025 (the year ending September 30, 2026) is due February 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did CHARLES RIVER CONSERVANCY INC last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended September 2025.
Who is the principal officer of CHARLES RIVER CONSERVANCY INC?
The 990 for the year ended September 30, 2025 names LAURA JASINSKI.
Who are the officers and directors of CHARLES RIVER CONSERVANCY INC?
The 990 for the year ended September 30, 2025 lists 10 people; 1 received compensation from the organization, the highest $165,476 (LAURA JASINSKI, EXECUTIVE DI).
How much revenue does CHARLES RIVER CONSERVANCY INC have?
On its 990 for the year ended September 30, 2025 it reported revenue of $1,056,299, expenses of $1,001,696 and total assets of $1,439,361 at year end.

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