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Organization Location Revenue Expenses Assets Program Fundr. cost Employees Type Follow
American Rivers INC AMERICAN RIVERS is championing a national effort to protect and restore all RIVERS, from remote mountain… 23-7305963 · FY2024 Washington, DC $53.4M $41.4M $40.1M 77% 13% 131 501(c)(3)
Alliance for the Chesapeake Bay INC CHESAPEAKE BAY watershed conservation and restoration education activities the mission of the ALLIANCE for… 54-1060924 · FY2024 Annapolis, MD $16.0M $15.5M $10.6M 87% 1% 52 501(c)(3)
Alliance of Rouge Communities To encourage watershed-wide cooperation and mutual support to meet water quality permit requirements and to… 22-3931720 · FY2024 Canton, MI $9.3M $9.4M $860.2K 99% 0% — 501(c)(3)
Riverkeeper INC Protect the ecological integrity of the hudson river & safeguard the drinking water supply of nyc 13-3204621 · FY2024 Ossining, NY $5.7M $5.3M $4.8M 66% 21% 39 501(c)(3)
Arundel Rivers Federation INC Deeply rooted in the south, west, and rhode RIVERS, ARUNDEL RIVERS FEDERATION heals and protects our… 52-2301464 · FY2024 Edgewater, MD $3.5M $3.4M $2.7M 86% 6% 13 501(c)(3)
Columbia Riverkeeper Columbia riverkeepers mission is to protect and restore the water quality of the Columbia river and all life… 91-1583492 · FY2024 Hood River, OR $3.5M $4.9M $7.8M 87% 6% 27 501(c)(3)
Chattahoochee Riverkeeper INC Chattahoochee Riverkeeper, Inc. the Riverkeeper is a nonprofit organization whose mission is to educate… 58-2095413 · FY2024 Smyrna, GA $3.2M $2.6M $5.9M 84% 8% 18 501(c)(3)
Partnership for the Umpqua Rivers Improve the environmental integrity and economic stability, foster community appreciation and implement… 93-1298800 · FY2024 Roseburg, OR $2.8M $2.6M $361.6K 91% 0% — 501(c)(3)
Friends of the Cheat INC To restore, preserve and promote the outstanding natural qualities of the CHEAT river watershed. 55-0739158 · FY2024 Kingwood, WV $2.5M $2.2M $2.9M 85% 3% 9 501(c)(3)
Friends of the Rappahannock INC To be the voice and active force for a healthy and scenic RAPPAHANNOCK river, through advocacy, education and… 54-1381671 · FY2024 Fredericksbrg, VA $2.4M $2.5M $3.1M 94% 1% 24 501(c)(3)
Charles River Watershed Association INC The organization's mission is to protect, restore, and enhance the CHARLES RIVER and its WATERSHED through… 04-6136989 · FY2023 Boston, MA $2.3M $2.6M $10.0M 78% 8% 29 501(c)(3)
Delaware Riverkeeper Network The DELAWARE RIVERKEEPER NETWORK champions the rights of our communities to a DELAWARE river and tributary… 74-3255972 · FY2024 Bristol, PA $1.7M $2.3M $2.3M 80% 7% 32 501(c)(3)
West Virginia Rivers Coalition INC To promote safe and healthy waters for all in WEST VIRGINIA, primarily through water policy advocacy. The… 52-1736621 · FY2024 Charleston, WV $1.6M $1.1M $4.8M 79% 5% 15 501(c)(3)
Chesapeake Legal Alliance INC Provide and coordinate volunteer LEGAL services to environmental organizations, citizens groups and… 26-4349757 · FY2024 Annapolis, MD $1.5M $1.1M $1.6M 78% 12% 8 501(c)(3)
Captains for Clean Water INC To restore and protect aquatic ecosystems for the use and enjoyment of all. 81-1789969 · FY2025 Fort Myers, FL $1.4M $1.5M $2.9M 82% 5% 10 501(c)(3)
Nashua River Watershed Association INC To restore and protect water quality and quantity for people, fish and wildlife. To conserve open spaces for… 23-7055674 · FY2023 Groton, MA $1.3M $1.3M $3.6M 68% 17% 17 501(c)(3)
North and South Rivers Watershed Association INC To preserve, restore and maintain and conserve the NORTH and SOUTH RIVERS WATERSHED. 23-7181992 · FY2024 Norwell, MA $1.3M $885.6K $4.3M 75% 8% 19 501(c)(3)
Milwaukee Riverkeeper INC Our mission is to protect water quality and wildlife habitat in the river corridors and to advocate for sound… 39-1846305 · FY2023 Milwaukee, WI $1.2M $936.8K $621.7K 81% 9% 10 501(c)(3)
Charles River Conservancy INC The Charles River Conservancy, Inc. strives to make the Charles River and its parks a well-maintained network… 04-3503656 · FY2024 Cambridge, MA $1.1M $1.0M $1.4M 65% 15% 7 501(c)(3)
Stream Restoration Incorporated To facilitate watershed RESTORATION projects and other environmental matters by focusing on abandoned coal… 23-2870334 · FY2024 Slippery Rock, PA $961.2K $956.3K $660.5K 93% 2% — 501(c)(3)
Three Rivers Waterkeeper INC To ensure that the allegheny, ohio and monongahela RIVERS are protected and our river and water quality laws… 27-0486655 · FY2024 Pittsburgh, PA $860.8K $473.4K $1.1M 61% 3% 8 501(c)(3)
Hackensack Riverkeeper INC The primary mission of HACKENSACK RIVERKEEPER, INC. Is to protect, preserve and restore the HACKENSACK river… 22-3530496 · FY2024 Hackensack, NJ $855.4K $871.4K $1.5M 85% 9% 36 501(c)(3)
Black Warrior Riverkeeper INC To protect and restore the BLACK WARRIOR river and its tributaries. 72-1537394 · FY2024 Birmingham, AL $788.8K $510.4K $1.4M 90% 3% 5 501(c)(3)
Charleston Waterkeeper CHARLESTON waterkeeper's mission IT to protect and restore charleston's waterways for our community and… 26-4178586 · FY2024 Mt Pleasant, SC $746.3K $497.1K $1.1M 65% 18% 8 501(c)(3)
Flint Riverkeeper INC Restore and preserve the habitat, water quality and flow of the FLINT river watershed for the benefit of… 26-3179215 · FY2024 Albany, GA $710.5K $655.5K $194.5K 67% 25% 4 501(c)(3)
Rivanna Conservation Alliance Working with the community to conserve the RIVANNA river and its tributaries through monitoring, restoration… 52-0194008 · FY2024 Charlottesville, VA $699.1K $642.9K $456.2K 85% 6% 8 501(c)(3)
Schuylkill Headwaters Association INC To preserve the waterways of sch. Cty. 23-3070445 · FY2024 Pottsville, PA $636.8K $656.1K $900.1K 96% 0% — 501(c)(3)
Clean River Partners INC Inspire people and organizations to value, protect and improve the cannon RIVER watershed's land and water. 41-1674744 · FY2024 Northfield, MN $622.5K $595.2K $675.5K 77% 7% 8 501(c)(3)
Massachusetts Rivers Alliance INC To restore and protect rivers and streams. 20-8387704 · FY2024 Somerville, MA $584.6K $612.2K $585.1K 59% 17% 5 501(c)(3)
Partners for Clean Streams INC PARTNERS for CLEAN STREAMS strives for abundant open space and a high quality natural environment; adequate… 20-3463367 · FY2024 Perrysburg, OH $539.8K $527.7K $175.2K 92% 4% 3 501(c)(3)
Yadkin Riverkeeper INC To preserve and protect the YADKIN pee dee river basin through education, advocacy, and action. 26-1874687 · FY2024 Winston Salem, NC $510.4K $457.2K $172.8K 76% 14% 5 501(c)(3)
Snake River Waterkeeper INC Snake River Waterkeeper exists for the purpose of applying science and law to protect, restore, and sustain… 47-1608920 · FY2024 Boise, ID $434.6K $437.7K $608.5K 40% 3% 1 501(c)(3)
Spokane Riverkeeper To protect and restore the health and ecological integrity of the SPOKANE river watershed and to defend the… 84-5175870 · FY2024 Spokane, WA $419.0K $384.3K $442.4K 69% 10% 3 501(c)(3)
Clean River Project INC To promote environmental awareness and to perform cleaning, maintaining, and preservation of the Merrimack… 26-1904414 · FY2024 Methuen, MA $414.8K $418.9K $316.0K 95% 1% 5 501(c)(3)
Middle Susquehanna Riverkeeper Association INC To support the clean water advocacy work of the MIDDLE SUSQUEHANNA river area. 47-5000692 · FY2024 Sunbury, PA $198.2K $337.3K $472.4K 76% 0% 1 501(c)(3)
Friends of the Shenandoah River INC to monitor the water quality of the Shenandoah River and its tributaries 80-0961307 · FY2024 Winchester, VA $172.9K $158.5K $122.7K 89% 0% 4 501(c)(3)
Altamaha Riverkeeper INC To Protect and restore the habitat, water quality and flow of the Altamaha River and its watershed… 58-2448037 · FY2024 Macon, GA $148.8K $201.5K $37.1K 81% 10% 2 501(c)(3)
Earthreports INC To provide vital advocacy to help maintain and restore one of marylands most valuable resources, the patuxent… 22-3878950 · FY2023 Uppr Marlboro, MD $108.1K — $96.1K — — 1 501(c)(3)
Clean Streams Rivers and Lakes 86-1647486 · FY2025 Fairfax, VA $63.1K — $7.6K — — — 501(c)(3)
2,046,138
nonprofits
212,946
funders
12,515,252
grants
22,549,931
directors
214,365
service providers
549,896,012
financial lines
Public data from IRS Form 990 e-file & Business Master File. A 990 shows reported financial activity, not measured program outcomes. Assets are from the IRS BMF and may lag the latest filing; fundraising cost is fundraising expenses as a share of total expenses. · philanthropy.org