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Organization	Location	Revenue	Expenses	Assets	Program	Fundr. cost	Employees	Type
Catskill Watershed Corporation The organization's primary purpose is to administer water- shed protection and partnership programs necessary… 14-1798021 · FY2025	Arkville, NY	$24.9M	$21.7M	$223.5M	93%	0%	27	501(c)(3)
Hudson River Housing To provide HOUSING and services to qualified individuals. 22-2456648 · FY2024	Poughkeepsie, NY	$22.1M	$20.8M	$38.0M	89%	0%	277	501(c)(3)
Sudbury Valley Trustees INC Land/river protection, stewardship, and education/advocacy 04-6049963 · FY2024	Sudbury, MA	$5.8M	$2.5M	$38.2M	71%	15%	18	501(c)(3)
Watershed Institute INC Keeping water clean, safe and healthy is the heart of our mission. We work to protect and restore our water… 21-0649717 · FY2024	Pennington, NJ	$5.7M	$5.2M	$34.0M	84%	8%	69	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)
Shorerivers INC SHORERIVERS protects marylands eastern shore waterways through science-based advocacy restoration, education… 26-3187608 · FY2024	Easton, MD	$5.4M	$5.4M	$4.8M	88%	7%	37	501(c)(3)
Sound Waters INC Creates opportunities for students to learn, train and explore on long island SOUND. 06-1263947 · FY2024	Stamford, CT	$3.3M	$4.0M	$17.8M	80%	13%	101	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)
East of Hudson Watershed Corporation The entity's primary purpose is to reduce the levels of phosphorus in the surface water of the new york city… 45-3809317 · FY2024	Patterson, NY	$3.1M	$2.6M	$12.4M	79%	0%	3	501(c)(3)
The Clearwater Conservancy of Central Pennsylvania INC To conserve and restore the natural resources through land conservation, water resources stewardship and… 25-1413990 · FY2024	State College, PA	$2.9M	$1.5M	$10.5M	53%	4%	14	501(c)(3)
Hudson River Community Sailing INC We develop leadership and academic success in new york city youth through partnerships with public schools… 26-1784215 · FY2023	New York, NY	$2.6M	$2.8M	$2.1M	80%	12%	88	501(c)(3)
Friends of the Chicago River Preserve and protect the CHICAGO RIVER system. 36-3559764 · FY2024	Chicago, IL	$2.5M	$2.5M	$2.7M	79%	15%	23	501(c)(3)
Hudson Highlands Land Trust INC HUDSON HIGHLANDS LAND TRUST, INC. Protects and preserves the natural resources, rural character and scenic… 13-3528266 · FY2024	Garrison, NY	$1.7M	$1.2M	$20.4M	77%	7%	7	501(c)(3)
New Jersey Water Environment Association Non profit educational organization dedicated to preserving and enhancing the WATER ENVIRONMENT. 22-2184162 · FY2023	Woodland Park, NJ	$1.5M	$1.4M	$3.2M	83%	0%	11	501(c)(3)
Friends of Herring River Wellfleet-Truro The purpose of the FRIENDS of HERRING RIVER is to promote education, research and public awareness of the… 27-0479634 · FY2024	Wellfleet, MA	$1.2M	$1.3M	$706.9K	87%	1%	3	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)
Sail Martha's Vineyard INC Preserve and protect the maritime history, culture and skills of MARTHA'S VINEYARD through on the water… 22-3240911 · FY2024	Vineyard Haven, MA	$745.9K	$568.4K	$1.7M	81%	0%	17	501(c)(3)
Raritan Baykeeper INC The baykeeper's mission is to protect, preserve, and restore the ecological integrity and productivity of the… 22-3617000 · FY2024	Hazlet, NJ	$684.4K	$665.5K	$536.5K	84%	11%	5	501(c)(3)
The Hudson Athens Lighthouse Preservation Committee 14-1681376 · FY2024	Athens, NY	$541.7K	$322.3K	$612.2K	72%	12%	—	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)
New York Open Water INC To provide safety, support and funding for open water swimming and kayaking programs and events in New York… 81-1013707 · FY2024	New York, NY	$492.7K	$513.8K	$124.0K	86%	0%	—	501(c)(3)
Save the River INC To protect and preserve the ecological integrity of st. Lawrence RIVER through advocacy, education and… 16-1125061 · FY2024	Clayton, NY	$483.6K	$483.0K	$1.8M	71%	12%	8	501(c)(3)
Friends of Northern Lake Champlain INC The organizations primary purpose is to protect the environment and the surrounding waters of NORTHERN LAKE… 57-1213590 · FY2024	St Albans, VT	$456.7K	$416.3K	$253.1K	100%	0%	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)
Hudson River Rowing Association INC Provide education and training to individuals in the art of ROWING without preference to race, creed, age… 14-1818590 · FY2024	Poughkeepsie, NY	$313.2K	$306.8K	$1.6M	94%	0%	—	501(c)(3)
Sustainable Hudson Valley INC SUSTAINABLE HUDSON valley's mission is to speed up, scale up, jazz up and leverage progress against climate… 11-3793286 · FY2024	Rhinebeck, NY	$300.9K	$310.3K	$31.8K	85%	0%	—	501(c)(3)
Jones River Watershed Association INC To protect, enhance and restore the quality of the natural resources in southeastern massachusetts, in… 22-3269260 · FY2024	Kingston, MA	$264.5K	$161.3K	$650.3K	74%	7%	1	501(c)(3)
Seneca Lake Pure Waters Association Organizations primary exempt purpose - to promote the understanding, preservation and improvement of the… 16-1382594 · FY2024	Geneva, NY	$260.0K	$311.1K	$338.3K	63%	18%	3	501(c)(3)
New Suffolk Waterfront Fund INC To preserve and protect NEW suffolk's unique and historic WATERFRONT in ways which respect the property's… 20-4437085 · FY2024	New Suffolk, NY	$243.3K	$143.5K	$3.5M	58%	2%	—	501(c)(3)
River Otter Ecology Project OUR MISSION is to create lasting protections for local waterways using community science, research… 45-4997526 · FY2024	Forest Knolls, CA	$241.3K	$176.9K	$118.8K	88%	3%	2	501(c)(3)
Mid-Hudson Aquatics INC An organization dedicated to promote aquatic awareness through teaching confidence in water safety, learn to… 47-3097347 · FY2024	Poughkeepsie, NY	$234.4K	$213.7K	$44.3K	96%	0%	10	501(c)(3)
Dolphins Swim Club of the Hudson Valley INC Our Mission is to create an enjoyable atmosphere conducive to learning every aspect of the sport of swimming… 83-0487625 · FY2024	Poughkeepsie, NY	$183.2K	—	$107.2K	—	—	12	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)
Delaware River and Bay Lighthouse Foundation INC Organized to promote preservation and restoration of the lighthouses located on the DELAWARE RIVER and BAY… 23-3023123 · FY2024	Lewes, DE	$111.4K	$56.2K	$629.3K	83%	0%	—	501(c)(3)
The Long Island Pine Barrens Society Protection of drinking water and preservation of open space especially in the Long Island Pine Barrens… 11-2789223 · FY2024	Wading River, NY	$99.1K	$82.1K	$123.6K	87%	6%	2	501(c)(3)
River Pool at Beacon INC A not-for-profit 501c3 organization with the goal of offering safe access for swimming in the Hudson River by… 20-1515620 · FY2025	Beacon, NY	$85.1K	—	$151.2K	—	—	5	501(c)(3)
Clear Water Wildlife Sanctuary Our mission is to serve our planet and the diversity of life IT supports. 72-1162121 · FY2024	Covington, LA	$77.9K	—	$238.2K	—	—	—	501(c)(3)
The Hudson Valley Trust INC To promote the cultural, historical, environmental & architectural heritage of areas surrounding HUDSON river… 14-1479500 · FY2024	Patterson, NY	$60.4K	$75.2K	$1.5M	82%	3%	—	501(c)(3)
Historic Hudson INC HISTORIC HUDSON, INC. Was founded to promote the preservation of the unique architectural heritage of the… 14-1795837 · FY2023	Hudson, NY	$58.4K	$61.7K	$0	31%	0%	2	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