Nonprofit · EIN 23-7221094
MYSTIC RIVER WATERSHED ASSOCIATION INC
Tax-exempt · ARLINGTON, MA 02476
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $5,653,194 | $5,335,747 | $317,447 | $11,102,274 | $1,199,698 | $9,902,576 |
| December 31, 2024 | 990 | $6,487,669 | $6,646,070 | -$158,401 | $10,795,076 | $1,248,193 | $9,546,883 |
| December 31, 2023 | 990 | $8,197,369 | $3,820,529 | $4,376,840 | $10,075,118 | $701,566 | $9,373,552 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $4,151,660
- of which government grants
- $1,491,438
- Program service revenue
- $845,550
- Investment income
- $655,984
- Net gain from sales of assets
- $381,985
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $398,381
- Compensation of officers, directors and key employees
- $321,044
- Other salaries and wages
- $1,435,542
- Salaries, compensation and benefits (total)
- $2,098,780
- Professional fundraising fees
- $0
- Legal fees
- $38,030
- Accounting fees
- $75,865
- Occupancy
- $56,353
- Travel
- $13,064
- Depreciation
- $15,983
- Program services (functional)
- $4,725,475
- Management and general (functional)
- $484,761
- Fundraising (functional)
- $125,511
Balance sheet and other
- Total assets, start of year
- $10,795,076
- Total assets, end of year
- $11,102,274
- Total liabilities, end of year
- $1,199,698
- Net assets, end of year
- $9,902,576
- Land, buildings and equipment
- $63,622
- Publicly traded securities
- $9,376,831
- Net assets without donor restrictions
- $5,810,213
- Net assets with donor restrictions
- $4,092,363
- Gross receipts
- $7,563,513
- Employees
- 30
- Volunteers
- 2,195
- Year formed
- 1976
- 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 December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| PATRICK HERRON | EXECUTIVE DI Officer | 40 | $166,938 | $32,718 |
| NASSER BRAHIM | DIR CLIMATE Highest-paid employee | 40 | $120,077 | $5,992 |
| MICHELLE LIEBETREU | DEV & COMMUN Officer | 40 | $121,939 | $0 |
| VICTOR CASTRO | VP & ASST CL Trustee or director, Officer | 5 | $0 | $0 |
| WILLIAM T DENMAN | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| RYAN DINGS | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| MONICA DRIGGERS | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| KAREN COLON HAYES | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| CHARLES HOLLEY | BOARD MEMBER Trustee or director, Officer | 5 | $0 | $0 |
| MARCIA MANONG | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| BEATRIZ GOMEZ MOUAKAD | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| PRABITHA NATARAJAN | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| ERGA PIERRETTE | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| HELEN QUACH | SECRETARY Trustee or director, Officer | 5 | $0 | $0 |
| JOHN REINHARDT | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
4 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| KELLY RYAN | TREASURER Trustee or director, Officer | 5 | $0 |
| BRITNEY SATTERLEE | PRESIDENT Trustee or director, Officer | 5 | $0 |
| RACHEL SORLIEN | BOARD MEMBER Trustee or director | 5 | $0 |
| JULIE ING STERN | BOARD MEMBER Trustee or director | 5 | $0 |
990 for the year ended December 31, 2024: 20 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| PATRICK HERRON | EXECUTIVE DI Officer | 40 | $122,254 | $8,263 |
| JULIA E WORMSER | SR. POLICY A Officer | 40 | $72,307 | $2,193 |
| MICHELLE LIEBETREU | DEV & COMMUN Officer | 40 | $66,883 | $4,710 |
| STEPHANIE CARVALHO | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| VICTOR CASTRO | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| WILLIAM T DENMAN | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| RYAN DINGS | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| MONICA DRIGGERS | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| ERIK HANSEN | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| CHARLES HOLLEY | TREASURER Trustee or director, Officer | 5 | $0 | $0 |
| MARK JACOBSON | CLERK Trustee or director, Officer | 5 | $0 | $0 |
| MARCIA MANONG | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| BEATRIZ GOMEZ MOUAKAD | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| ERGA PIERRETTE | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| HELEN QUACH | SECRETARY Trustee or director, Officer | 5 | $0 | $0 |
| JOHN REINHARDT | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| KELLY RYAN | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| BRITNEY SATTERLEE | PRESIDENT Trustee or director, Officer | 5 | $0 | $0 |
| JULIE ING STERN | VP & ASST. C Trustee or director, Officer | 5 | $0 | $0 |
| KAREN COLON HAYES | BOARD MEMBER Officer | 5 | $0 | $0 |
990 for the year ended December 31, 2023: 20 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| PATRICK HERRON | EXECUTIVE DI Officer | 40 | $149,923 | $17,664 |
| JULIA E WORMSER | DEPUTY DIREC Officer | 40 | $139,939 | $5,121 |
| NASSER BRAHIM | PRESIDENT Trustee or director, Officer | 5 | $0 | $0 |
| DAVID BURSON | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| STEPHANIE CARVALHO | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| VICTOR CASTRO | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| RYAN DINGS | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| MONICA DRIGGERS | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| ERIK HANSEN | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| CHARLES HOLLEY | TREASURER Trustee or director, Officer | 5 | $0 | $0 |
| MARK JACOBSON | CLERK Trustee or director, Officer | 5 | $0 | $0 |
| BARBARA LANDAU | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| MARCIA MANONG | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| ERGA PIERRETTE | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| HELEN QUACH | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| JOHN REINHARDT | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| KELLY RYAN | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
| BRITNEY SATTERLEE | BAORD MEMBER Trustee or director | 5 | $0 | $0 |
| JULIE ING STERN | VICE PRESIDE Trustee or director, Officer | 5 | $0 | $0 |
| KARL TOUET | BOARD MEMBER Trustee or director | 5 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 23 MAPLE ST, ARLINGTON, MA 02476-4903
- Principal officer (990 for 2025)
- BRITNEY SATTERLEE, 23 MAPLE ST, ARLINGTON, MA 02476
- Signed the 990
- KELLY RYAN, TREASURER
- Phone
- (617) 865-6580
- Website
- WWW.MYSTICRIVER.ORG
- Return prepared by
- DAVISKELLY LLP
Mission
THE MYSTIC RIVER WATERSHED IS A NETWORK OF RIVERS, STREAMS AND PONDS THAT ALL FLOW INTO THE MYSTIC RIVER AND ULTIMATELY BOSTON HARBOR. HOME TO 600,000 RESIDENTS, THE MYSTIC RIVER WATERSHED ASSOCIATION IS THE ONLY ORGANIZATION WORKING TO PROTECT AND RESTORE THIS WATERSHED; AND ENGAGE AND EDUCATE RESIDENTS.
Program accomplishments
- RESTORATION & RECREATION. MYRWA USES SCIENCE AND ADVOCACY TO PROTECT WATER QUALITY, RESTORE IMPORTANT HABITAT INCLUDING FOR RIVER HERRING, BUILD CLIMATE RESILIENCE ACROSS THE WATERSHED AND CONNECT 25 MILES OF PATHS AND IMPROVE SIX PARKS IN OUR WATERSHED. FROM BUILDING NEW PARKS, TO PILOTING GREEN INFRASTRUCTURE IN PARTNERSHIP WITH OUR MUNICIPALITIES-THESE EFFORTS PROTECT BOTH PEOPLE AND PLACES.Expenses $1,701,829 · grants $197,488
- EDUCATION AND VOLUNTEER STEWARDSHIP. MYRWA EDUCATES MORE THAN 2,000 YOUTH THROUGH EFFECTIVE PLACE-BASED PROGRAMMING IN SCHOOLS AND AFTER-SCHOOL PROGRAMS AND ENGAGES 1,800 VOLUNTEERS IN CLEANING UP AND CARING FOR OUR PARKS.Expenses $464,858 · grants $7,016 · revenue $845,550
- CLIMATE RESILIENCY. MYRWA FOUNDED THE RESILIENT MYSTIC COLLABORATIVE IN PARTNERSHIP WITH 20 MUNICIPAL PARTNERS TO DEVELOP REGIONAL PROJECTS THAT CREATE HEALTHIER, AND MORE CLIMATE RESILIENT COMMUNITIES. THE RMC COMMUNITIES HAVE SECURED >50M EARMARKS AND STATE GRANTS TO ADDRESS STORMWATER FLOODING, URBAN HEAT ISLANDS AND SEA-LEVEL RISE.Expenses $2,558,788 · grants $193,877
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 December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 23-7221094
- 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
- 1976
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Environment (C600)
- Assets (IRS master file)
- $11,102,274
- Income (IRS master file)
- $7,563,513
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $5,653,194 | $5,335,747 | $11,102,274 | XML |
| 990 | December 2024 | $6,487,669 | $6,646,070 | $10,795,076 | XML |
| 990 | December 2023 | $8,197,369 | $3,820,529 | $10,075,118 | XML |
| 990 | December 2022 | $3,691,084 | $2,810,441 | $4,843,866 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | December 2019 | – | – | – | IRS |
| 990 | December 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 23-7221094).
Questions about MYSTIC RIVER WATERSHED ASSOCIATION INC
- What is the EIN of MYSTIC RIVER WATERSHED ASSOCIATION INC?
- The employer identification number (EIN) of MYSTIC RIVER WATERSHED ASSOCIATION INC is 23-7221094.
- Is MYSTIC RIVER WATERSHED ASSOCIATION INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1976.
- Are donations to MYSTIC RIVER WATERSHED ASSOCIATION INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does MYSTIC RIVER WATERSHED ASSOCIATION 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 MYSTIC RIVER WATERSHED ASSOCIATION INC due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did MYSTIC RIVER WATERSHED ASSOCIATION INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of MYSTIC RIVER WATERSHED ASSOCIATION INC?
- The 990 for the year ended December 31, 2025 names BRITNEY SATTERLEE.
- Who are the officers and directors of MYSTIC RIVER WATERSHED ASSOCIATION INC?
- The 990 for the year ended December 31, 2025 lists 19 people; 3 received compensation from the organization, the highest $166,938 (PATRICK HERRON, EXECUTIVE DI).
- How much revenue does MYSTIC RIVER WATERSHED ASSOCIATION INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $5,653,194, expenses of $5,335,747 and total assets of $11,102,274 at year end.
Other nonprofits in ARLINGTON
- FURNITURE TRUST ORGANIZATION INC EIN 26-2607677 · last filed 990 for 2024
- BUILDING ELECTRIFICATION ACCELERATOR INC EIN 99-4646270 · last filed 990-EZ for 2025
- ARLINGTON LAND TRUST INC EIN 04-3486255 · last filed 990 for 2025
- THE NUCLEAR DECOMMISSIONING COLLABORATIVE INC EIN 46-3460868 · last filed 990 for 2024
- REDWOOD SOCIETY EIN 84-2266032 · last filed 990-N for 2025
- FRIENDS OF THE ROBBINS TOWN GARDENS INC EIN 47-4506704 · last filed 990-N for 2024
- ENERGY ACTION PARTNERS INC EIN 47-2216555 · last filed 990-N for 2023
- FOOD LINK INC EIN 47-1840355 · last filed 990 for 2025