Mystic River Watershed Association Inc logo

Mystic River Watershed Association Inc

Public charity · Grantmaker Arlington, MA EIN: 23-7221094 Website

Mystic River Watershed Association (MyRWA) is a public charity based in Arlington, Massachusetts, formed in 1976. It works to protect and restore the Mystic River watershed and engage and educate its residents through water-quality and habitat work, climate resilience, recreation, and education.

Key facts about Mystic River Watershed Association Inc

In short: Mystic River Watershed Association Inc gave $356K across 14 grants in 2025 (avg $25K), mostly in Massachusetts. 50% of 2025 grantees were new. Source: 2025 IRS Form 990.

EIN
23-7221094
Latest 990 filing
Form 990, 2025
Annual giving (2025)
$355,902
Grants made (2025)
14
Average grant
$25,422
Median grant
$14,557
New grantees (estimate)
50% first-time grantees (7 of 14, 2025)
Total assets
$11,102,274
Primary geography
Massachusetts (100% of itemized 2025 grant dollars)

Data from IRS Form 990, 2025; updated September 2026. New grantees are estimated by matching recipient names across years (methodology).

Financial Overview

From 2025 IRS Form 990 · View filing

Total Assets

$11.1M

+2.8% YoY

Annual Giving

$356K

-59.9% YoY

Grant Count

14

+0.0% YoY

Avg Grant Size

$25K

-59.9% YoY

Is Mystic River Watershed Association Inc open to new grantees?

50%

first-time grantees, 2025

In 2025, 7 of 14 grantees (50%) were first-time recipients. First grants averaged $27K; repeat grants $24K. How we count

Medians: $6K first-time, $15K repeat.

  • 50% of 2025 grantees were also funded in 2024. Method
  • Giving fell 34% from 2022 to 2025. Method

Estimate from itemized grant lists in IRS Form 990 filings (2020–2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.

Research compiled by Grantable AI from public sources. Last updated September 2026.

Mission & Focus Areas

In its filing, MyRWA states that it works to protect and restore the watershed and engage and educate residents. Its programs include restoration and recreation; education and volunteer stewardship; and climate resilience. The organization says it uses science and advocacy to protect water quality, restore habitat, build climate resilience, connect 25 miles of paths, and improve six parks. It also reports educating more than 2,000 youth through school and after-school programming and engaging 1,800 volunteers in caring for parks.

MyRWA’s website describes work on water-quality monitoring and nature-based solutions, including green infrastructure, as well as resident-led cooling projects and wetland and salt-marsh restoration. Its 2025 grants included support for greenways, education, clean air, heat convening, climate resilience, and environmental restoration.

Among the 2025 grantees, Chinese Culture Connection describes its mission as helping Chinese immigrants and other Chinese-descended residents of Greater Boston retain and appreciate their heritage, develop bicultural fluency, and deepen others’ understanding. GreenRoots describes its work as advancing environmental justice and quality of life through community engagement, education, youth leadership, and projects and campaigns. Groundwork Somerville describes its mission as promoting walking and biking, sensible transit development, and clean waterways, and serving as a regional resource for sustainable development.

Grantmaking

In filing year 2025, MyRWA reported 14 grants totaling $355,902. Grant amounts ranged from $6,000 to $130,000, with a median of $14,556. All reported grant dollars went to recipients in Massachusetts.

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Geographic Focus

Where this funder awards grants

MyRWA’s work concerns the Mystic River watershed, which the organization says includes 21 cities and towns: Arlington, Belmont, Boston (Charlestown and East Boston), Burlington, Cambridge, Chelsea, Everett, Lexington, Malden, Medford, Melrose, Reading, Revere, Somerville, Stoneham, Wakefield, Watertown, Wilmington, Winchester, Winthrop, and Woburn. In its 2025 filing, all reported grant dollars went to Massachusetts recipients.

Grant Distribution by State

4states

Share of 2025 grant dollars across all 14 itemized grants.

Cities

BostonChelseaEverettMedfordDorchesterLynnMaldenBrocktonLawrenceCambridgeDurhamLincolnWiinthropAllstonBurlingtonCantonCharlestownCohassetConcordGroton

Giving Over Time

Total grant dollars and number of grants per year

$0$250K$500K$750K$1M0 grants2019 9 grants2020 15 grants2021 13 grants2022 11 grants2023 14 grants2024 14 grants2025

From 2020 to 2025, annual grant giving ranged from $330K (2020) to $888K (2024). In 2025 it made 14 grants totaling $356K.

Grant Insights

How this funder distributes its grants

Top Recipients

Top 10 recipients in 2025

City of Boston: $130KCity of Boston$130KEverette Community Growers: $68KEverette Community Growers$68KFriends of Belle Isle March: $23KFriends of Belle Isle March$23KChinese Culture Connection Inc: $22KChinese Culture Connection Inc$22KTrustees of Tufts College: $20KTrustees of Tufts College$20KGreenroots Inc: $15KGreenroots Inc$15KCambridge Health Alliance: $15KCambridge Health Alliance$15KGroundwork Somerville Inc: $14KGroundwork Somerville Inc$14KCity of Medford: $12KCity of Medford$12KField of Green (Via Arthur Kurtz): $12KField of Green (Via ArthurKurtz)$12K

The largest 2025 recipient was City of Boston ($130K). Together the top 10 received $332K.

Grant Size Distribution

67 grants across all recorded years

49<$50K14$50–100K3$100–250K$250–500K1$500K–1M$1–5M$5M+

The most common grant size was under $50K: 49 grants of 67 (73%).

Giving History

Grant recipients and amounts by year

RecipientPurposeAmount
City of Boston Boston, MAGreenways$130,000
Everette Community Growers Everett, MACovid Safe Cooling$67,796
Friends of Belle Isle March Wiinthrop, MAEducation$22,934
Chinese Culture Connection Inc Malden, MAEPA Collab Grant$22,250
Trustees of Tufts College Medford, MAClean Air$20,000
Greenroots Inc Chelsea, MAHeat Convening$15,146
Cambridge Health Alliance Malden, MAClean Air$15,000
Groundwork Somerville Inc Somerville, MAClimate Resilience$14,113
City of Medford Medford, MAClimate Resiliance$12,213
Field of Green (Via Arthur Kurtz) Lincoln, MAENV. Restoration$12,100

Financial History

Multi-year comparison from IRS filings

Filing year Assets Revenue Expenses Grants
2025 $11,102,274 $5,653,194 $5,335,747 $355,902 (14 grants)
2024 $10,795,076 $6,487,669 $6,646,070 $888,053 (14 grants)
2023 $10,075,118 $8,197,369 $3,820,529 $438,237 (11 grants)
Revenue
Expenses
Net Investment Income
$0$2.5M$5M$7.5M$10M2019 2020 2021 2022 2023 2024 2025
Metric202520242023
Total Assets$11,102,274$10,795,076$10,075,118
Revenue$5,653,194$6,487,669$8,197,369
Expenses$5,335,747$6,646,070$3,820,529
Net Investment Income$655,984$289,818$192,817

Data update history

When this profile's IRS filing data changed on Grantable

  1. Updated Form 990 for fiscal year 2020 (received by the IRS August 19, 2021)
  2. Updated Form 990 for fiscal year 2021 (received by the IRS October 7, 2022)
  3. Updated Form 990 for fiscal year 2022 (received by the IRS September 21, 2023)
  4. Updated Form 990 for fiscal year 2023 (received by the IRS September 29, 2024)
  5. Updated Form 990 for fiscal year 2024 (received by the IRS September 24, 2025)
  6. Added Form 990 for fiscal year 2025 (received by the IRS June 22, 2026)
  7. Added Form 990 for fiscal year 2019 (received by the IRS July 16, 2020)
  8. IRS filings on file for fiscal years 2020–2024

Leadership & Key People

Leadership team and compensation from IRS filings

The 2025 filing lists Patrick Herron as Executive Director; Nasser Brahim as Director of Climate; Michelle Liebetreu as Development and Communications; and Victor Castro as Vice President and Assistant Clerk. It also lists William T. Denman, Ryan Dings, Monica Driggers, Karen Colon Hayes, Charles Holley, and Marcia Manong as board members.

Mystic River Watershed Association Inc is led by Britney Satterlee, President since 2024 (on filings since 2020); 3 of 19 officers listed in 2025 are compensated.

Officers on the 2025 filing

  • Britney Satterlee

    President

    Secretary → Baord Member, 2021

    Baord Member → President, 2024

    On filings since 2020

    5 hrs/week

    No compensation reported

  • Nasser Brahim

    Director Climate

    Vice President → President, 2022

    President → Director Climate, 2025

    On filings since 2020

    40 hrs/week

    $120K (2025)

  • Patrick Herron

    Executive Di

    On filings since 2019

    40 hrs/week

    $77K (2019) → $167K (2025)

  • Michelle Liebetreu

    Development & Communications

    On filings since 2024

    40 hrs/week

    $67K (2024) → $122K (2025)

  • Charles Holley

    Board Member

    Treasuer → Treasurer, 2022

    Treasurer → Board Member, 2025

    On filings since 2020

    5 hrs/week

    No compensation reported

  • John Reinhardt

    Board Member

    Director → Board Member, 2021

    On filings since 2020

    5 hrs/week

    No compensation reported

  • Marcia Manong

    Board Member

    Director → Board Member, 2021

    On filings since 2020

    5 hrs/week

    No compensation reported

  • Erga Pierrette

    Board Member

    On filings since 2021

    5 hrs/week

    No compensation reported

  • Julie Ing Stern

    Board Member

    Vice President → Vice President & Assistant C, 2024

    Vice President & Assistant C → Board Member, 2025

    On filings since 2021

    5 hrs/week

    No compensation reported

  • Kelly Ryan

    Treasurer

    Board Member → Treasurer, 2025

    On filings since 2022

    5 hrs/week

    No compensation reported

  • Victor Castro

    Vice President & Assistant Cl

    Board Member → Vice President & Assistant Cl, 2025

    On filings since 2022

    5 hrs/week

    No compensation reported

  • Helen Quach

    Secretary

    Board Member → Secretary, 2024

    On filings since 2023

    5 hrs/week

    No compensation reported

  • Monica Driggers

    Board Member

    On filings since 2023

    5 hrs/week

    No compensation reported

  • Ryan Dings

    Board Member

    On filings since 2023

    5 hrs/week

    No compensation reported

  • Beatriz Gomez Mouakad

    Board Member

    On filings since 2024

    5 hrs/week

    No compensation reported

  • Karen Colon Hayes

    Board Member

    On filings since 2024

    5 hrs/week

    No compensation reported

  • William T. Denman

    Board Member

    On filings since 2024

    5 hrs/week

    No compensation reported

  • Prabitha Natarajan

    Board Member

    New on the 2025 filing

    5 hrs/week

    No compensation reported

  • Rachel Sorlien

    Board Member

    New on the 2025 filing

    5 hrs/week

    No compensation reported

Former officers (21)
  • Former: Erik Hansen (2019–2024) — Board Member
  • Former: Julia E. Wormser (2019–2024) — Senior Policy A
  • Former: Mark Jacobson (2019–2024) — Clerk
  • Former: Stephanie Carvalho (2022–2024) — Board Member
  • Former: Barbara Landau (2019–2023) — Board Member
  • Former: David Burson (2019–2023) — Board Member
  • Former: Karl Touet (2019–2023) — Board Member
  • Former: Joshua A. Weinberg (2019–2021) — Board Member
  • Former: Meera Deean (2019–2021) — Board Member
  • Former: Rick Olick (2019–2021) — Board Member
  • Former: Shannon Ames (2019–2021) — President
  • Former: Larry Feldman (2020–2021) — Board Member
  • Former: Monica Nakielski (2020–2021) — Board Member
  • Former: Terry Carter (2021) — Board Member
  • Former: Caroline Rogers Broderick (2019–2020) — Vice President
  • Former: Mark Rogers (2019–2020) — Secretary
  • Former: Pamela Vanbeuekom (2019–2020) — Treasurer
  • Former: Rose Fennell (2019–2020) — Director
  • Former: Joshua Boyce (2019) — Secretary
  • Former: Karen L. Grossman (2019) — Board Member
  • Former: Lawrence Feldman (2019) — President

Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.

Compensation Overview

From 2025 IRS filing

Patrick Herron — Executive Di: $167KPatrick HerronExecutive Di$167KMichelle Liebetreu — Dev & Commun: $122KMichelle LiebetreuDev & Commun$122KNasser Brahim — DIR Climate: $120KNasser BrahimDIR Climate$120K

The highest reported compensation on the 2025 filing was $167K, to Patrick Herron (Executive Di). 3 officers or directors reported compensation on that filing.

Contact

Mailing address: 23 Maple Street, Arlington, MA 02476
Phone: (617) 865-6580
Website: https://mysticriver.org

Frequently asked questions about Mystic River Watershed Association Inc

How much does Mystic River Watershed Association Inc give each year?

Mystic River Watershed Association Inc gave $356K across 14 grants in 2025, according to its 2025 IRS Form 990. In 2024 it gave $888K across 14 grants.

What is Mystic River Watershed Association Inc's typical grant size?

Mystic River Watershed Association Inc's median grant in 2025 was $14,557, and its average grant was $25,422, across 14 grants on its 2025 IRS Form 990. Organizations receiving their first grant from Mystic River Watershed Association Inc that year got $27K on average.

Where does Mystic River Watershed Association Inc give grants?

Mystic River Watershed Association Inc gives mostly in Massachusetts: 100% of the grant dollars itemized on its 2025 IRS Form 990 went to recipients there. The most frequent recipient cities were Medford, MA (3 grants) and Malden, MA (2 grants).

Does Mystic River Watershed Association Inc give general operating support?

Not in 2025: none of the 14 grants with a stated purpose on Mystic River Watershed Association Inc's 2025 IRS Form 990 were described as general or operating support. Recurring purposes include "Climate Resilience" (3 grants).

Who are Mystic River Watershed Association Inc's largest grantees?

Mystic River Watershed Association Inc's largest 2025 grantees include City of Boston ($130,000), Everette Community Growers ($67,796) and Friends of Belle Isle March ($22,934), according to its 2025 IRS Form 990. Together they received 62% of its itemized 2025 grant dollars.

How large is Mystic River Watershed Association Inc?

Mystic River Watershed Association Inc reported $11.1M in total assets on its 2025 IRS Form 990. Its revenue that year was $5.7M.

What does Mystic River Watershed Association Inc fund?

In its filing, MyRWA states that it works to protect and restore the watershed and engage and educate residents. Its programs include restoration and recreation; education and volunteer stewardship; and climate resilience. See mission & focus areas ↑

How do I apply for a grant from Mystic River Watershed Association Inc?

Mystic River Watershed Association Inc has no public application process in the sources Grantable reviewed. Check mysticriver.org for current guidelines, or contact the foundation directly before submitting a request.

What is Mystic River Watershed Association Inc's EIN?

Mystic River Watershed Association Inc's EIN (Employer Identification Number) is 23-7221094. IRS Form 990 filing data is available on this page for 2019–2025.

Data last updated September 2026. Sourced from IRS Form 990 filings. Research dossier generated September 2026.

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