funder-graph › Recipients
Who funds Mystic River Watershed Association Inc
EIN 23-7221094 · Arlington, MA · NTEE C600
Mystic River Watershed Association Inc of Arlington, MA (EIN 23-7221094) was named as a grant recipient by 62 funders in 191 grants paid totaling $6,296,524 in tax years 2018–2025, as reported on the funders' Forms 990-PF and 990 Schedule I. Each edge was resolved to this EIN at the match tier shown. Dataset version 2026.09.0, built 2026-09-03.
Grants received
$6,296,524
191 grants paid
Funders
62
distinct grantmakers
Tax years
2018–2025
as reported by funders
Approved for future payment
$201,000
not included in grants received
Funders
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Grants
The 193 most recent grants naming this organization.
| Tax year | Funder | Recipient | Match | Amount | Type | Purpose | Source filing |
|---|---|---|---|---|---|---|---|
| 2025 | National Fish and Wildlife Foundation | Mystic River Watershed Association Inc Arlington, MA | A | $75,631 | paid | BELLE ISLE SALTMARSH SPARROW HABITAT RESTORATION | 202641979349300629 |
| 2025 | Trustees of Boston University | Mystic River Watershed Association Arlington, MA | A | $69,807 | paid | RESEARCH | 202611339349301666 |
| 2025 | Bonneville Environmental Foundation | Mystic River Watershed Association Arlington, MA | A | $50,000 | paid | FUNDING FOR INFILTRATION TRENCHES IN THE MYSTIC RIVER WATERSHED PROJECT. | 202543109349302644 |
| 2025 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $41,745 | paid | For grant recipient's exempt purposes | 202601389349301700 |
| 2025 | The Llewellyn Foundation C/O Melissa Hallmark | Mystic River Watershed Association Arlington, MA | B | $30,000 | paid | GREENWAYS | 202501889349100405 |
| 2025 | Caswell Foundation | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Water quality research and improvement | 202620549349100402 |
| 2025 | The Edgemont Foundation Inc | Mystic River Watershed Association Arlington, MA | B | $15,000 | paid | SUPPORT | 202631069349100323 |
| 2025 | Patagoniaorg | Mystic River Watershed Association Inc Arlington, MA | B | $15,000 | paid | TO SUPPORT ENVIRONMENTAL PROJECTS. | 202640719349100529 |
| 2025 | Donor Advised Charitable Giving Inc | Mystic River Watershed Association Inc Arlington, MA | A | $10,400 | paid | ENVIRONMENTAL AND ANIMALS | 202611199349300601 |
| 2025 | American Online Giving Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $9,606 | paid | GENERAL SUPPORT | 202533509349301608 |
| 2025 | American Online Giving Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $9,606 | paid | GENERAL SUPPORT | 202641969349302754 |
| 2025 | Raymond James Charitable Endowment Fund | Mystic River Watershed Association Inc Arlington, MA | A | $9,000 | paid | GENERAL SUPPORT | 202630489349300743 |
| 2025 | The Minneapolis Foundation | Mystic River Watershed Association Arlington, MA | A | $8,500 | paid | DONOR ADVISED, GENERAL | 202513299349300326 |
| 2025 | Vanguard Charitable Endowment Program | Mystic River Watershed Association Inc Arlington, MA | A | $5,500 | paid | FOR RECIPIENT'S EXEMPT PURPOSE | 202621329349306657 |
| 2025 | Russell Colgate Fund Inc | Mystic River Watershed Association Arlington, MA | B | $5,000 | paid | GENERAL PURPOSES | 202601059349100965 |
| 2025 | Adelard & Valeda Roy Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $5,000 | paid | GENERAL OPERATING SUPPORT | 202621279349103012 |
| 2025 | Everett Citizens Foundation Inc | Mystic River Watershed Association Arlington, MA | B | $4,000 | paid | GENERAL SUPPORT | 202512889349100221 |
| 2025 | The Cht Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $4,000 | paid | WATER QUALITY MONITORING | 202621329349102887 |
| 2025 | The Lander Family Charitable Foundation | Mystic River Watershed Association Arlington, MA | B | $1,200 | paid | GENERAL SUPPORT | 202621319349101422 |
| 2025 | Analog Devices Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $1,030 | paid | GENERAL SUPPORT | 202610749349100061 |
| 2025 | August Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $500 | paid | ENVIRONMENTAL RESTORATION AND EDUCATION | 202641709349100404 |
| 2024 | Fidelity Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $630,000 | paid | SALARY SUPPORT | 202503089349100205 |
| 2024 | Fidelity Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $395,000 | paid | SALARY SUPPORT | 202503089349100205 |
| 2024 | Fidelity Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $375,000 | paid | SALARY SUPPORT | 202503089349100205 |
| 2024 | Liberty Mutual Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $200,000 | approved, future | HEAT-PROOFING SOMERVILLE AND CHARLESTOWN COMMUNITIES THROUGH TWO CLIMATE-RESILIENT PARKS | 202533169349100813 |
| 2024 | Fidelity Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $130,000 | paid | SALARY SUPPORT | 202503089349100205 |
| 2024 | The Schmidt Family Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $100,000 | paid | OCEAN STEWARDSHIP AND RESEARCH | 202513219349104316 |
| 2024 | Liberty Mutual Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $100,000 | paid | HEAT-PROOFING SOMERVILLE AND CHARLESTOWN COMMUNITIES THROUGH TWO CLIMATE-RESILIENT PARKS | 202533169349100813 |
| 2024 | National Fish and Wildlife Foundation | Mystic River Watershed Association Inc Arlington, MA | A | $67,517 | paid | BELLE ISLE SALTMARSH SPARROW HABITAT RESTORATION | 202501999349300110 |
| 2024 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $47,740 | paid | For grant recipient's exempt purposes | 202521349349310887 |
| 2024 | Trustees of Boston University | Mystic River Watershed Association Arlington, MA | A | $31,471 | paid | RESEARCH | 202511349349311621 |
| 2024 | Cummings Foundation Grants Inc (fka Oneworld Boston Inc) | Mystic River Watershed Association Arlington, MA | B | $30,000 | paid | Education | 202513219349106741 |
| 2024 | Eaglemere Foundation Inc | Mystic River Wathershed Association Arlington, MA | C | $30,000 | paid | GENERAL CONTRIBUTION | 202541339349103784 |
| 2024 | The Llewellyn Foundation C/O Melissa Hallmark | Mystic River Watershed Association Arlington, MA | B | $30,000 | paid | GREENWAYS | 202431559349100608 |
| 2024 | Caswell Foundation | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Water quality research and improvement | 202530779349100103 |
| 2024 | Conine Family Foundation C/O Paul Mccoy Family Office Svcs | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | GENERAL PURPOSE | 202513159349101566 |
| 2024 | William E Schrafft and Bertha E Schrafft Charitable Trust | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Mission Safe Success Coaching | 202542979349100814 |
| 2024 | The Nordblom Family Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $25,000 | paid | GENERAL OPERATIONS | 202543219349102134 |
| 2024 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | FULFILL CHARITABLE PURPOSE | 202630519349100408 |
| 2024 | The East Boston Foundation | Mystic River Watershed Arlington, MA | A | $21,300 | paid | TO ENHANCE THE LIVES OF CHILDREN, YOUTH AND FAMILIES IN EAST BOSTON | 202503179349306225 |
| 2024 | American Endowment Foundation | Mystic River Watershed Association Inc Arlington, MA | A | $15,000 | paid | ENVIRONMENTAL | 202513219349310376 |
| 2024 | Patagoniaorg | Mystic River Watershed Association Inc Arlington, MA | B | $15,000 | paid | TO SUPPORT ENVIRONMENTAL PROJECTS. | 202510769349101026 |
| 2024 | American Online Giving Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $11,287 | paid | GENERAL SUPPORT | 202530159349302758 |
| 2024 | Vanguard Charitable Endowment Program | Mystic River Watershed Association Inc Arlington, MA | A | $9,500 | paid | FOR RECIPIENT'S EXEMPT PURPOSE | 202511349349313096 |
| 2024 | Raymond James Charitable Endowment Fund | Mystic River Watershed Association Inc Arlington, MA | A | $7,500 | paid | GENERAL SUPPORT | 202520499349301607 |
| 2024 | Russell Colgate Fund Inc | Mystic River Watershed Association Arlington, MA | B | $7,000 | paid | GENERAL PURPOSES | 202500609349100105 |
| 2024 | Boston Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $6,000 | paid | Operating Support/Annual Fund | 202531329349304083 |
| 2024 | National Marine Sanctuary Foundation | Mysitc River Watershed Association Arlington, MA | A | $5,860 | paid | TRASH, STORMWATER AND MARINE DEBRIS CURRUCULUM - EXPERIENTIAL FIELD TRIPS | 202502629349300805 |
| 2024 | Frank and Marie Hamilton Charitable Trust | Mystic River Watershed Association Arlington, MA | B | $5,000 | paid | RESEARCH | 202531349349102988 |
| 2024 | Adelard & Valeda Roy Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $5,000 | paid | GENERAL OPERATING SUPPORT | 202541359349102554 |
| 2024 | Louis and Anne Abrons Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $5,000 | paid | General & Unrestricted | 202503149349100230 |
| 2024 | The Vertex Foundation Inc | Mystic River Watershed Arlington, MA | C | $5,000 | paid | GENERAL SUPPORT | 202531769349100108 |
| 2024 | The Hamilton Company Charitable Foundation | Mystic River Watershed Association Arlington, MA | B | $4,500 | paid | GENERAL | 202513219349104661 |
| 2024 | The Cht Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $2,000 | paid | WATER QUALITY MONITORING PROGRAM | 202531209349102253 |
| 2024 | John Mirak Foundation | Mystic River Watershed Assoc Arlington, MA | D | $2,000 | paid | General purpose | 202533219349107593 |
| 2024 | Eversource Energy Foundation Inc C/O Kevin Morrissey | Mystic River Watershed Association (ma) Boston, MA | D | $1,500 | paid | SUPPORT FOR THE ENVIRONMENTAL PROGRAMS AND SERVICE | 202543169349102509 |
| 2024 | Jpmorgan Chase Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $1,300 | paid | MATCHING CONTRIBUTION (GENERAL OPERATING SUPPORT) | 202531699349100608 |
| 2024 | Analog Devices Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $1,071 | paid | GENERAL SUPPORT | 202540719349100314 |
| 2024 | George & Miriam Martin Foundation | Mystic River Watershed Assoc Arlington, MA | C | $1,000 | paid | SUPPORT THEIR WORK | 202533029349101203 |
| 2024 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Association Arlington, MA | B | $1,000 | paid | FULFILL CHARITABLE PURPOSE | 202630519349100408 |
| 2024 | The Lander Family Charitable Foundation | Mystic River Watershed Association Arlington, MA | B | $1,000 | paid | GENERAL SUPPORT | 202541569349100114 |
| 2024 | The Lumpkin Family Foundation C/O Adrienne N Cole | Mystic River Watershed Association Inc Arlington, MA | B | $1,000 | paid | CHARITABLE | 202533189349101813 |
| 2024 | August Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $500 | paid | ENVIRONMENTAL RESTORATION AND EDUCATION | 202512399349100511 |
| 2024 | The Mccance Foundation | Mystic River Watershed Association Arlington, MA | B | $300 | paid | General Support | 202502959349101070 |
| 2024 | The Pfizer Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $90 | paid | VOLUNTEER PROGRAM | 202503119349101850 |
| 2023 | Fidelity Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $405,000 | paid | SALARY SUPPORT | 202403029349100710 |
| 2023 | Fidelity Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $250,000 | paid | LAND | 202403029349100710 |
| 2023 | Charities Aid Foundation America | Mystic River Watershed Association Arlington, MA | A | $239,126 | paid | CHARITABLE DONATION | 202440679349300014 |
| 2023 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $199,785 | paid | For grant recipient's exempt purposes | 202441369349301334 |
| 2023 | Fidelity Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $105,000 | paid | NEW CONSTRUCTION | 202403029349100710 |
| 2023 | Liberty Mutual Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $90,000 | paid | ADVANCING CLIMATE RESILIENCE IN SOMERVILLE | 202521909349100027 |
| 2023 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Assoc Arlington, MA | C | $90,000 | paid | FULFILL CHARITABLE PURPOSE | 202413199349101246 |
| 2023 | Liberty Mutual Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $90,000 | paid | ADVANCING CLIMATE RESILIENCE IN SOMERVILLE | 202443179349101704 |
| 2023 | The Devonshire Foundation | Mystic River Watershed Association Arlington, MA | B | $75,000 | paid | MYSTIC RIVER WATERSHED ASSOCIATION'S (MYRWA) THREE-YEAR GRANT SUPPORTS MYRWA TO BUILD A MORE ROBUST ANNUAL GIVING PROGRAM, AND TO PUT MYRWA IN A POSITION TO BE ABLE TO ARTICULATE THE IMPORTANCE OF THIS WORK FOR ALL OF ITS COMMUNITY MEMBERS. | 202423209349102217 |
| 2023 | The Schmidt Family Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $58,000 | paid | OCEAN STEWARDSHIP AND RESEARCH | 202443209349108109 |
| 2023 | Eaglemere Foundation Inc | Mystic River Wathershed Association Arlington, MA | C | $50,470 | paid | GENERAL CONTRIBUTION | 202412799349100401 |
| 2023 | The Devonshire Foundation | Mystic River Watershed Association Arlington, MA | B | $50,000 | paid | MATCHING GRANT | 202423209349102217 |
| 2023 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Assoc Arlington, MA | C | $43,070 | paid | FULFILL CHARITABLE PURPOSE | 202413199349101246 |
| 2023 | Cummings Foundation Grants Inc (fka Oneworld Boston Inc) | Mystic River Watershed Association Arlington, MA | B | $30,000 | paid | Education | 202443209349106889 |
| 2023 | The Llewellyn Foundation C/O Ken Magoteaux | Mystic River Watershed Association Arlington, MA | B | $30,000 | paid | GENERAL | 202301569349100805 |
| 2023 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Assoc Arlington, MA | C | $25,000 | paid | FULFILL CHARITABLE PURPOSE | 202413199349101246 |
| 2023 | Caswell Foundation | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Water quality research and improvement | 202410719349100001 |
| 2023 | Conine Family Foundation C/O Paul Mccoy Family Office Svcs | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | GENERAL PURPOSE | 202441339349100704 |
| 2023 | William E Schrafft and Bertha E Schrafft Charitable Trust | Mystic River Watershed Arlington, MA | C | $20,000 | paid | Youth Education Programming | 202402459349100000 |
| 2023 | American Endowment Foundation | Mystic River Watershed Association Inc Arlington, MA | A | $15,000 | paid | ENVIRONMENTAL | 202442479349301654 |
| 2023 | Patagoniaorg | Mystic River Watershed Association Inc Arlington, MA | B | $15,000 | paid | TO SUPPORT ENVIRONMENTAL PROJECTS. | 202420759349101107 |
| 2023 | The Feibelman Foundation C/O Barbara Feibelman | Mystic River Watershed Association Arlington, MA | B | $11,750 | paid | CHARITABLE | 202401349349104265 |
| 2023 | Boston Scientific Foundation Inc | Mystic River Watershed Association Inc Braintree, MA | B | $10,000 | paid | WATERSHED EDUCATION | 202421299349101962 |
| 2023 | Raymond James Charitable Endowment Fund | Mystic River Watershed Association Inc Arlington, MA | A | $6,250 | paid | GENERAL SUPPORT | 202430469349302713 |
| 2023 | Vanguard Charitable Endowment Program | Mystic River Watershed Association Inc Arlington, MA | A | $5,500 | paid | FOR RECIPIENT'S EXEMPT PURPOSE | 202441359349309439 |
| 2023 | Everett Citizens Foundation Inc | Mystic River Watershed Arlington, MA | C | $5,217 | paid | GENERAL SUPPORT | 202332869349100148 |
| 2023 | Russell Colgate Fund Inc | Mystic River Watershed Association Arlington, MA | B | $5,000 | paid | GENERAL PURPOSES | 202430609349100433 |
| 2023 | Louis and Anne Abrons Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $5,000 | paid | General & Unrestricted | 202433169349100813 |
| 2023 | The Hamilton Company Charitable Foundation | Mystic River Watershed Association Arlington, MA | B | $4,500 | paid | GENERAL | 202433209349106723 |
| 2023 | Adelard and Valeda Roy Foundation | Mystic River Watershed Association Inc Somerville, MA | B | $3,000 | paid | GENERAL OPERATING SUPPORT | 202401299349102110 |
| 2023 | The Vertex Foundation Inc | Mystic River Watershed Association Arlington, MA | B | $2,500 | paid | GENERAL SUPPORT | 202422999349100522 |
| 2023 | The Cht Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $2,000 | paid | MYSTIC RIVER WATER QUALITY MONITORING PROGRAM | 202421299349102617 |
| 2023 | John Mirak Foundation | Mystic River Watershed Assoc Arlington, MA | C | $2,000 | paid | General purpose | 202423209349108552 |
| 2023 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Assoc Arlington, MA | C | $1,000 | paid | FULFILL CHARITABLE PURPOSE | 202413199349101246 |
| 2023 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Assoc Arlington, MA | C | $1,000 | paid | FULFILL CHARITABLE PURPOSE | 202413199349101246 |
| 2023 | The Lumpkin Family Foundation C/O Adrienne N Cole | Mystic River Watershed Association Inc Arlington, MA | B | $1,000 | paid | CHARITABLE | 202403189349100640 |
| 2023 | August Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $500 | paid | ENVIRONMENTAL RESTORATION AND EDUCATION | 202402259349100710 |
| 2023 | Jpmorgan Chase Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $250 | paid | GENERAL OPERATING SUPPORT | 202443059349101309 |
| 2023 | Amazonsmile Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $206 | paid | GENERAL SUPPORT | 202540919349100629 |
| 2022 | The Devonshire Foundation | Mystic River Watershed Association Arlington, MA | B | $125,000 | paid | MYSTIC RIVER WATERSHED ASSOCIATION'S (MYRWA) THREE-YEAR GRANT SUPPORTS MYRWA TO BUILD A MORE ROBUST ANNUAL GIVING PROGRAM, AND TO PUT MYRWA IN A POSITION TO BE ABLE TO ARTICULATE THE IMPORTANCE OF THIS WORK FOR ALL OF ITS COMMUNITY MEMBERS. | 202303199349103085 |
| 2022 | Eaglemere Foundation Inc | Mystic River Wathershed Association Arlington, MA | C | $50,000 | paid | GENERAL CONTRIBUTION | 202333199349107973 |
| 2022 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $29,005 | paid | For grant recipient's exempt purposes | 202321309349304807 |
| 2022 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $29,005 | paid | For grant recipient's exempt purposes | 202430459349302913 |
| 2022 | The Devonshire Foundation | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | MATCHING GRANT | 202303199349103085 |
| 2022 | Conine Family Foundation C/O Paul Mccoy Family Office Svcs | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | GENERAL PURPOSE | 202343189349104899 |
| 2022 | Caswell Foundation | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Water quality research and improvement | 202310749349100006 |
| 2022 | William E Schrafft and Bertha E Schrafft Charitable Trust | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Operating | 202332579349100208 |
| 2022 | American Endowment Foundation | Mystic River Watershed Association Inc Arlington, MA | A | $25,000 | paid | ENVIRONMENTAL | 202332499349300338 |
| 2022 | The Llewellyn Foundation C/O Ken Magoteaux | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | GENERAL | 202241789349100719 |
| 2022 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Assoc Arlington, MA | C | $25,000 | paid | FULFILL CHARITABLE PURPOSE | 202313159349100706 |
| 2022 | National Fish and Wildlife Foundation | Mystic River Watershed Association Arlington, MA | A | $16,738 | paid | CREATING A TRASH FREE | 202311869349301051 |
| 2022 | The Blackbaud Giving Fund | Mystic River Watershed Association Arlington, MA | A | $13,089 | paid | GENERAL SUPPORT | 202312409349300046 |
| 2022 | The Nature Conservancy | Mystic River Watershed Association Arlington, MA | A | $12,500 | paid | CONSERVATION ACTIVITIES | 202321329349304902 |
| 2022 | Everett Citizens Foundation Inc | Mystic River Watershed Arlington, MA | C | $10,000 | paid | GENERAL SUPPORT | 202232569349100128 |
| 2022 | Russell Colgate Fund Inc | Mystic River Watershed Association Arlington, MA | B | $10,000 | paid | GENERAL PURPOSES | 202330649349100003 |
| 2022 | Wynn Resorts Foundation | Mystic River Watershed Association Arlington, MA | A | $7,800 | paid | Charitable Grant | 202322509349301312 |
| 2022 | Raymond James Charitable Endowment Fund | Mystic River Watershed Association Inc Arlington, MA | A | $7,500 | paid | GENERAL SUPPORT | 202320469349302162 |
| 2022 | Vanguard Charitable Endowment Program | Mystic River Watershed Association Inc Arlington, MA | A | $5,500 | paid | For recipient's exempt purpose | 202331359349303108 |
| 2022 | Louis and Anne Abrons Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $5,000 | paid | General & Unrestricted | 202313169349100466 |
| 2022 | Adelard and Valeda Roy Foundation | Mystic River Watershed Association Inc Somerville, MA | B | $3,000 | paid | GENERAL OPERATING SUPPORT | 202321259349100147 |
| 2022 | The Cht Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $2,000 | paid | MYSTIC RIVER WATER QUALITY MONITORING PROGRAM | 202341299349103594 |
| 2022 | Eastern Bank Foundation F/K/a Eastern Bank Charitable Foundation | Mystic River Watershed Association Arlington, MA | B | $2,000 | paid | EXEMPT PURPOSE | 202341319349104319 |
| 2022 | John Mirak Foundation | Mystic River Watershed Assoc Arlington, MA | C | $2,000 | paid | General purpose | 202440449349101109 |
| 2022 | Eversource Energy Foundation Inc C/O Kevin Morrissey | Mystic River Watershed Association (ma) Arlington, MA | C | $1,500 | paid | SUPPORT FOR THE RIVER WATERSHED ENVIRONMENTAL PROG | 202333059349100618 |
| 2022 | August Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $1,000 | paid | ENVIRONMENTAL RESTORATION AND EDUCATION | 202322409349100207 |
| 2022 | Edmund & Betsy Cabot Charitable Fndn | Mystic River Watershed Association Arlington, MA | B | $1,000 | paid | GENERAL | 202331359349103653 |
| 2022 | Amazonsmile Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $270 | paid | GENERAL SUPPORT | 202313119349100141 |
| 2022 | The Pfizer Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $60 | paid | MATCHING GIFTS | 202313079349100411 |
| 2021 | The Blackbaud Giving Fund | Mystic River Watershed Association Inc Arlington, MA | A | $159,473 | paid | GENERAL SUPPORT | 202340539349301374 |
| 2021 | The Blackbaud Giving Fund | Mystic River Watershed Association Inc Arlington, MA | A | $159,473 | paid | GENERAL SUPPORT | 202242499349300414 |
| 2021 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $115,305 | paid | For grant recipient's exempt purposes | 202221339349302787 |
| 2021 | National Fish and Wildlife Foundation | Mystic River Watershed Association Arlington, MA | A | $39,543 | paid | CONSERVATION PROJECTS | 202202229349301755 |
| 2021 | William E Schrafft and Bertha E Schrafft Charitable Trust | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Operating | 202242869349100614 |
| 2021 | Russell Colgate Fund Inc | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | GENERAL PURPOSES | 202231249349101203 |
| 2021 | The Nature Conservancy | Mystic River Watershed Association Arlington, MA | A | $25,000 | paid | CONSERVATION ACTIVITIES | 202231339349308608 |
| 2021 | Caswell Foundation | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Water quality research and improvement | 202221299349100142 |
| 2021 | The Nature Conservancy | Mystic River Watershed Association Arlington, MA | A | $25,000 | paid | CONSERVATION ACTIVITIES | 202322099349300922 |
| 2021 | The Llewellyn Foundation A1579 | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | GENERAL | 202121949349100812 |
| 2021 | Vanguard Charitable Endowment Program | Mystic River Watershed Association Inc Arlington, MA | A | $7,250 | paid | FOR RECIPIENT'S EXEMPT PURPOSE | 202211339349310116 |
| 2021 | Schwab Charitable Fund | Mystic River Watershed Association Inc Arlington, MA | A | $7,200 | paid | ENVIRONMENTAL AND ANIMALS | 202230499349301028 |
| 2021 | Wynn Resorts Limited Employee Foundation | Mystic River Watershed Association Arlington, MA | A | $5,784 | paid | Charitable Grant | 202232779349301908 |
| 2021 | Adelard and Valeda Roy Foundation | Mystic River Watershed Assocation Somerville, MA | C | $3,000 | paid | GENERAL OPERATING SUPPORT | 202241329349103359 |
| 2021 | The Cht Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $3,000 | paid | BASELINE WATER QUALITY MONITORING PROGRAM | 202211239349101786 |
| 2021 | Mystic Wellington Yacht Club Inc | Mystic River Watershed Org Arlington, MA | C | $1,000 | paid | General Support | 202212039349300716 |
| 2021 | August Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $500 | paid | ENVIRONMENTAL RESTORATION AND EDUCATION | 202242069349100304 |
| 2021 | The Bank of America Charitable Foundation Inc | Mystic River Watershed Association Arlington, MA | B | $50 | paid | OPERATIONAL SUPPORT | 202221309349101737 |
| 2020 | Lawrence & Lillian Solomon Foundation Inc | Mystic River Watershed Assoc Arlington, MA | C | $41,000 | paid | FULFILL CHARITABLE PURPOSE | 202102579349100820 |
| 2020 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $40,950 | paid | For grant recipient's exempt purposes | 202121359349300427 |
| 2020 | Eaglemere Foundation Inc | Mystic River Wathershed Association Arlington, MA | C | $30,000 | paid | GENERAL CONTRIBUTION | 202141359349100839 |
| 2020 | Boston Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $30,000 | paid | Capital Campaign | 202121319349302772 |
| 2020 | Network for Good | Mystic River Watershed Association Inc Arlington, MA | A | $29,336 | paid | Unrestricted | 202131819349300608 |
| 2020 | Caswell Foundation | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Water quality research and improvement | 202141329349102334 |
| 2020 | William E Schrafft and Bertha E Schrafft Charitable Trust | Mystic River Watershed Association Arlington, MA | B | $25,000 | paid | Operating | 202111739349100616 |
| 2020 | National Fish and Wildlife Foundation | Mystic River Watershed Association Arlington, MA | A | $15,221 | paid | VARIOUS CONSERVATION | 202132089349300708 |
| 2020 | The Nature Conservancy | Mystic River Watershed Association Arlington, MA | A | $15,000 | paid | CONSERVATION ACTIVITIES | 202131349349307088 |
| 2020 | American Online Giving Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $7,761 | paid | GENERAL SUPPORT | 202120469349300002 |
| 2020 | Boston Scientific Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $5,200 | paid | STEM EDUCATION IN OUR BACKYARD | 202101949349100130 |
| 2020 | American Endowment Foundation | Mystic River Watershed Association Inc Arlington, MA | A | $5,000 | paid | PROGRAMS | 202133159349308163 |
| 2020 | Paul & Edith Babson Foundation C/O Wilmington Trust 106846-000 | Mystic River Watershed Association Arlington, MA | B | $4,000 | paid | GENERAL SUPPORT | 202143199349106044 |
| 2020 | The Hamilton Company Charitable Foundation | Mystic River Watershed Association Arlington, MA | B | $3,500 | paid | GENERAL | 202123199349103532 |
| 2020 | The Cht Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $3,000 | paid | BASELINE WATER QUALITY MONITORING PROGRAM | 202141239349101874 |
| 2020 | Edmund & Betsy Cabot Charitable Fndn | Mystic River Watershed Association Arlington, MA | B | $2,250 | paid | GENERAL | 202103159349101310 |
| 2020 | John Mirak Foundation | Mystic River Watershed Assoc Arlington, MA | C | $2,000 | paid | General purpose | 202103199349107855 |
| 2020 | French Fdn TR Udecl | Mystic River Watershed Association Arlington, MA | B | $2,000 | paid | GENERAL OPERATING | 202113169349104266 |
| 2020 | Mystic Wellington Yacht Club Inc | Mystic River Watershed Org Arlington, MA | C | $1,000 | paid | General Support | 202122989349300942 |
| 2020 | Boston Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $750 | paid | Operating Support/Annual Fund | 202121319349302772 |
| 2020 | August Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $500 | paid | ENVIRONMENTAL RESTORATION AND EDUCATION | 202112439349100221 |
| 2020 | The Charlotte Foundation Inc | Mystic River Watershed Assoc Arlington, MA | C | $500 | paid | Operations budget assistance | 202133169349102313 |
| 2020 | Amazonsmile Foundation | Mystic River Watershed Association Inc Arlington, MA | B | $154 | paid | GENERAL SUPPORT | 202113199349100901 |
| 2020 | The Bank of America Charitable Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $50 | paid | GENERAL SUPPORT | 202131479349100003 |
| 2020 | The East Boston Foundation | Mystic River Watershed Arlington, MA | A | $0 | paid | TO ENHANCE THE LIVES OF CHILDREN, YOUTH AND FAMILIES IN EAST BOSTON | 202123019349302077 |
| 2019 | Eaglemere Foundation Inc | Mystic River Wathershed Association Arlington, MA | C | $30,000 | paid | GENERAL CONTRIBUTION | 202021649349100837 |
| 2019 | William E Schrafft and Bertha E Schrafft Charitable Trust | Mystic River Watershed Association Arlington, MA | B | $20,000 | paid | Operating | 202031789349100803 |
| 2019 | National Fish and Wildlife Foundation | Mystic River Watershed Association Arlington, MA | A | $18,030 | paid | Various Conservation Proj | 202031889349300908 |
| 2019 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $9,750 | paid | For grant recipient's exempt purposes | 202041789349301474 |
| 2019 | Raymond James Charitable Endowment Fund C/O Raymond James Trust Na Trustee | Mystic River Watershed Association Inc Arlington, MA | A | $9,500 | paid | GENERAL USE | 202030089349300813 |
| 2019 | Patagoniaorg C/O Moss Adams Llp | Mystic River Watershed Association Inc Arlington, MA | B | $8,500 | paid | TO SUPPORT ENVIRONMENTAL PROJECTS. | 202040729349100614 |
| 2019 | American Tower Charitable Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $1,000 | approved, future | GENERAL PURPOSE | 202021369349100207 |
| 2019 | American Tower Charitable Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | B | $25 | paid | GENERAL PURPOSE | 202021369349100207 |
| 2018 | National Fish and Wildlife Foundation | Mystic River Watershed Association Arlington, MA | A | $55,217 | paid | Various Conservation Proj | 201921359349308927 |
| 2018 | William E Schrafft and Bertha E Schrafft Charitable Trust | Mystic River Watershed Association Arlington, MA | C | $22,500 | paid | Operating | 201931629349100308 |
| 2018 | Boston Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $20,000 | paid | Environment/Wildlife/Agriculture | 201931369349300728 |
| 2018 | Boston Foundation Inc | Mystic River Watershed Association Inc Arlington, MA | A | $10,500 | paid | Operating Support | 201931369349300728 |
| 2018 | Fidelity Investments Charitable Gift Fund | Mystic River Watershed Association Inc Arlington, MA | A | $10,450 | paid | FOR GRANT RECIPIENT'S EXEMPT PURPOSES | 201931359349301478 |
| 2018 | Patagoniaorg C/O Moss Adams Llp | Mystic River Watershed Association Inc Arlington, MA | B | $8,500 | paid | TO SUPPORT ENVIRONMENTAL PROJECTS. | 201930729349100318 |
| 2018 | Eaglemere Foundation Inc | Mystic River Wathershed Association Arlington, MA | C | $3,000 | paid | GENERAL CONTRIBUTION | 201931359349103358 |
| 2018 | John Mirak Foundation | Mystic River Watershed Assoc Arlington, MA | C | $500 | paid | General purpose | 201912659349100151 |
| 2018 | Boston Sand & Gravel Company Charitable Foundation | Mystic River Watershed Association Arlington, MA | B | $250 | paid | CHARITABLE DONATION TO PUBLIC CHARITY | 201931349349102558 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Recipient matching for this dataset version has not yet completed its independent precision check. Tier A rows carry the EIN the filer reported; tiers B–D are inferred and should be read as leads until the check is published on the methodology page.
Derived from IRS Form 990-PF and Form 990 Schedule I e-file XML filed by the funders shown; this organization's identity from the IRS Exempt Organizations Business Master File. Dataset version 2026.09.0, built 2026-09-03. The rows as Parquet: manifest.
The same organization elsewhere in the program: exempt status and filing health · federal awards · grant guidance · open opportunities.
This is informational only, derived from public data on the dates shown. It is not an eligibility determination, and not legal, tax, or accounting advice. Verify against the official source before relying on it.