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Organization	Location	Revenue	Expenses	Assets	Program	Fundr. cost	Employees	Type
River Partners RIVER PARTNERS mission is to bring life back to rivers by creating wildlife habitat for the benefit of people… 94-3302335 · FY2023	Chico, CA	$56.9M	$19.3M	$56.8M	87%	1%	126	501(c)(3)
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)
The Partnership Project INC Enhance protection of the natural environment. 52-2192070 · FY2024	Washington, DC	$29.2M	$34.0M	$29.8M	91%	3%	86	501(c)(3)
Superior Watershed Partnership To assist in the conservation, protection, restoration and sustainability of natural resources. 38-3492677 · FY2024	Marquette, MI	$7.1M	$5.8M	$11.6M	96%	0%	62	501(c)(3)
Mystic River Watershed Association INC The MYSTIC RIVER WATERSHED is a network of rivers, streams and ponds that all flow into the MYSTIC RIVER and… 23-7221094 · FY2024	Arlington, MA	$6.5M	$6.6M	$11.1M	90%	2%	30	501(c)(3)
The Elizabeth River Project To restore the health of the Elizabeth River by working with our neighbors, businesses, and governments. 54-1663058 · FY2023	Norfolk, VA	$3.4M	$4.0M	$13.2M	68%	11%	53	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)
Copper River Watershed Project The Copper River Watershed Project promotes a salmon-rich, intact watershed to support culturally diverse… 92-0162546 · FY2024	Cordova, AK	$2.7M	$2.6M	$773.6K	91%	1%	11	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)
Watersheds United Vermont INC To empower community-based watershed groups in all parts of the state to protect and restore vermont's waters. 83-1625362 · FY2024	Montpelier, VT	$2.4M	$2.7M	$510.6K	100%	0%	1	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)
Coalition for the Poudre River Watershed To improve and maintain the ecological health of the POUDRE RIVER WATERSHED through community collaboration. 46-2850042 · FY2024	Fort Collins, CO	$1.9M	$1.7M	$1.4M	92%	3%	4	501(c)(3)
Chagrin River Watershed Partners INC Preserving and enhancing the scenic and environmental quality of the ecosystem of the CHAGRIN RIVER, lake… 34-1822374 · FY2024	Willoughby, OH	$1.7M	$1.8M	$800.2K	89%	0%	10	501(c)(3)
Tinkers Creek Watershed Partnersinc To protect and restore water quality and habitats of the TINKERS CREEK WATERSHED through community… 20-5465233 · FY2024	Twinsburg, OH	$1.6M	$1.4M	$394.9K	95%	1%	53	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)
Tookany Tacony Frankford Watershed Partn Ership The organization's mission is to improve the health and vitality of the WATERSHED by collaborating with… 75-3203091 · FY2023	Philadelphia, PA	$1.2M	$1.2M	$916.5K	83%	7%	20	501(c)(3)
Friends of the Yampa INC Our mission is to protect and enhance the environmental and recreational integrity of the Yampa River and its… 27-3657002 · FY2024	Steamboat Spr, CO	$1.2M	$1.0M	$1.2M	81%	4%	3	501(c)(3)
Nanticoke Watershed Alliance INC Fostering partnerships and progress in conserving the natural, cultural, and recreational resources of the… 52-1948570 · FY2025	Seaford, DE	$942.8K	$870.7K	$584.0K	90%	2%	4	501(c)(3)
Clean Lakes Alliance INC CLEAN LAKES alliance's mission is to continue to build a community of people, businesses, organizations, and… 27-3917243 · FY2024	Madison, WI	$939.0K	$1.3M	$818.1K	71%	18%	13	501(c)(3)
Watershed Alliance of York To improve YORK county's waters making them cleaner and healthier for all 41-2028968 · FY2024	Mount Joy, PA	$634.4K	$606.3K	$251.9K	99%	0%	—	501(c)(3)
Idaho Rivers United INC Protect and restore the RIVERS of IDAHO. Our focus is the ecological integrity of our RIVERS, but the lens we… 82-0439916 · FY2024	Boise, ID	$552.1K	$619.8K	$104.5K	88%	9%	6	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)
Friends of Bass River INC Our mission, through active monitoring, collaboration with local, state & federal entities, and direct… 88-1972334 · FY2024	Yarmouth Port, MA	$537.2K	$406.5K	$289.4K	89%	1%	1	501(c)(3)
The River Alliance of Wisconsin INC To empower people to protect and restore water. 39-1792143 · FY2024	Madison, WI	$477.5K	$773.3K	$1.2M	69%	14%	8	501(c)(3)
Kinnickinnic River Land Trust INC We work with the community to conserve and protect the health and beauty of the KINNICKINNIC RIVER and its… 39-6593121 · FY2024	River Falls, WI	$445.4K	$184.6K	$2.1M	71%	17%	5	501(c)(3)
Doan Brook Watershed Partnership Facilitate and support conservation and restoration projects within the watershed -- with an eye towards… 04-3636350 · FY2024	Cleveland, OH	$422.1K	$391.7K	$456.6K	81%	3%	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)
30 Mile River Watershed Association To work as a community for clean and healthy lakes, ponds and streams in our watershed.30 Mile is committed… 26-1526329 · FY2024	Mount Vernon, ME	$408.9K	$339.6K	$568.2K	72%	16%	16	501(c)(3)
Mills River Partnership INC To improve and protect the MILLS RIVER watershed as a source of the public water drinking supply. 45-2913039 · FY2024	Mills River, NC	$406.2K	$400.6K	$403.1K	96%	0%	1	501(c)(3)
Friends of the St Clair River Watershed Inspire citizen actions through stewardship, monitoring and education to restore, protect and enhance the ST… 77-0670838 · FY2024	Saint Clair, MI	$316.4K	$349.7K	$259.4K	74%	15%	—	501(c)(3)
Purgatoire Watershed Partnership INC Our mission is to restore, protect, and enhance the PURGATOIRE river WATERSHED through stakeholder… 46-1757863 · FY2024	Trinidad, CO	$277.4K	$259.9K	$53.7K	89%	0%	—	501(c)(3)
Cooperation Cannon River The mission of COOPERATION CANNON RIVER is to foster economic democracy and community resilience in… 82-0852275 · FY2024	Minneapolis, MN	$248.6K	$153.9K	$145.2K	82%	0%	—	501(c)(3)
Acton-Wakefield Watersheds Alliance INC Protect and restore area WATERSHEDS 20-3341604 · FY2024	Union, NH	$248.4K	$267.4K	$161.6K	68%	18%	10	501(c)(3)
Hudson River Watershed Alliance INC To unite and empower communities to protect our shared waters. We work across the HUDSON RIVER WATERSHED to… 45-2772407 · FY2024	Kingston, NY	$163.9K	—	$97.2K	—	—	2	501(c)(3)
Alliance for the Mystic River Watershed INC ALLIANCE for MYSTIC RIVER wastershed's mission is to restore and sustain ecological health, community… 88-3766501 · FY2024	Mystic, CT	$137.7K	—	$71.6K	—	—	7	501(c)(3)
Clean Water Coalition of Indian River County 83-2498906 · FY2024	Vero Beach, FL	$102.2K	—	$155.2K	—	—	—	501(c)(3)
Partnership for Clean Water and Education 82-1548482 · FY2021	Leesburg, VA	$96.3K	—	$0	—	—	—	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