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Organization	Location	Revenue	Expenses	Assets	Program	Fundr. cost	Employees	Type
The Freshwater Trust To preserve and restore FRESHWATER ecosystems. 93-0843521 · FY2024	Portland, OR	$11.4M	$10.8M	$8.9M	68%	10%	57	501(c)(3)
Conservation Foundation Preserve and restore natural areas, protect rivers and watersheds, and promote stewardship of our environment. 23-7221206 · FY2024	Naperville, IL	$7.5M	$4.0M	$21.2M	84%	11%	43	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)
Legacy Land Conservancy To protect natural areas, working farmlands, waters and recreation spaces in southeastern michigan. 38-2899980 · FY2024	Ann Arbor, MI	$6.9M	$4.4M	$12.4M	91%	4%	14	501(c)(3)
Pennypack Ecological Restoration Trust The mission of the TRUST and its membership is to protect, restore and preserve the lands of the central… 23-1732453 · FY2023	Huntingdon Valley, PA	$6.0M	$1.9M	$56.3M	76%	7%	18	501(c)(3)
Save the Bay INC SAVE the BAY protects, restores, and improves the ecological health of the narragansett BAY region, including… 05-0343046 · FY2024	Providence, RI	$4.9M	$5.4M	$19.9M	82%	14%	43	501(c)(3)
Center for Watershed Protection To protect, restore and enhance our streams, rivers, lakes, wetlands and bays. 54-1644387 · FY2024	Fulton, MD	$3.8M	$3.7M	$2.7M	90%	1%	21	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)
Raritan Headwaters Association To ensure the protection of the natural resources of the HEADWATERS region of the RARITAN river basin through… 22-1722944 · FY2024	Gladstone, NJ	$2.7M	$2.1M	$14.2M	80%	14%	58	501(c)(3)
Rogue River Watershed Council Enhance resilience in ROGUE RIVER watersheds through ecological restoration and engagement with community… 11-3823736 · FY2024	Central Point, OR	$2.7M	$2.6M	$512.2K	93%	1%	10	501(c)(3)
Living Lands & Waters To aid in the protection, preservation and restoration of the natural environment of the nations major rivers… 36-4244353 · FY2024	East Moline, IL	$2.5M	$2.3M	$5.4M	82%	5%	32	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)
Neponset River Watershed Assoc Conservation of watershed to protect and restore the Neponset River, its tributaries, and surrounding… 23-7135204 · FY2024	Canton, MA	$2.0M	$1.4M	$2.4M	82%	5%	11	501(c)(3)
Great Lakes Aquatic Habitat Networkand Fund INC Our mission is to promote the protection and enhancement of water quality and water resources in the Great… 20-5693503 · FY2024	Petoskey, MI	$1.7M	$1.8M	$1.1M	85%	7%	16	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)
Georgia River Network INC GEORGIA RIVER NETWORK is working to ensure a clean water legacy by engaging and empowering georgians to… 58-2404112 · FY2024	Athens, GA	$1.3M	$1.3M	$1.2M	89%	3%	5	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)
Muskegon River Watershed Assembly The MUSKEGON RIVER WATERSHED ASSEMBLY is dedicated to the preservation, protection, restoration, and… 38-3523819 · FY2024	Big Rapids, MI	$1.0M	$959.2K	$381.3K	84%	0%	3	501(c)(3)
Flint River Quarium INC Conservation and education. The FLINT riverquarium promotes conservation through aquatic exhibits and… 02-0687836 · FY2023	Albany, GA	$1.0M	$1.2M	$1.6M	86%	0%	—	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)
Toussaint River Watershed Conservancy To conserve wetlands in the TOUSSAINT RIVER region 85-3833243 · FY2024	Westlake, OH	$932.1K	$86.6K	$1.4M	78%	0%	1	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)
Loyalhanna Watershed Association INC To protect, conserve and restore the natural resources of the LOYALHANNA creek WATERSHED. The ASSOCIATION… 23-7135993 · FY2023	Ligonier, PA	$673.8K	$799.1K	$3.9M	63%	12%	5	501(c)(3)
Grand Traverse Bay Watershed Initiative INC The GRAND TRAVERSE BAY WATERSHED INITIATIVE, INC. Advocates for clean water in the GRAND TRAVERSE BAY and… 38-3198787 · FY2024	Traverse City, MI	$647.7K	$713.7K	$428.6K	69%	10%	4	501(c)(3)
Farmington River Watershed Association INC Protect and preserve the natural resources of the FARMINGTON RIVER WATERSHED area 06-0741585 · FY2024	Simsbury, CT	$645.6K	$665.2K	$2.9M	87%	2%	5	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)
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)
Water for Wildlife Foundation Preserve history and conserve land and WATER resources 23-7449875 · FY2024	Lander, WY	$272.7K	$193.1K	$1.1M	77%	10%	—	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)
Headwaters Land Conservancy The purpose of HEADWATERS LAND CONSERVANCY is to protect the natural beauty of northeast michigan by… 38-3183846 · FY2024	Gaylord, MI	$257.4K	$320.1K	$2.1M	69%	5%	5	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)
Back River Restoration Committee INC RESTORATION of the BACK RIVER watershed 26-2595058 · FY2024	Baltimore, MD	$244.2K	$273.5K	$201.2K	96%	0%	15	501(c)(3)
Chippewa Watershed Conservancy INC To protect and restore central michigan's land, water, and wildlife resources to improve the quality of life… 38-3181796 · FY2024	Mt Pleasant, MI	$202.7K	$207.1K	$3.1M	71%	8%	2	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)
Friends of Corte Madera Creek Watershed Protect and enhance natural ecosystems of the WATERSHED, especially those related to creeks and wetlands… 68-0365270 · FY2025	Larkspur, CA	$147.1K	$101.3K	$207.9K	95%	3%	—	501(c)(3)
Great Lakes Basin Conservancy INC To preserve and protect the land, natural environment, open space and islands of the GREAT LAKES BASIN for… 31-1502060 · FY2024	Gates Mills, OH	$124.9K	$151.1K	$43.5K	98%	0%	—	501(c)(3)
Watershed Preservation Network 68-0484190 · FY2024	San Geronimo, CA	$121.6K	—	$28.4K	—	—	—	501(c)(3)
Sacramento River Watershed Program To ensure that current and potential uses of the watersheds resources are sustained, restored, and where… 68-0486576 · FY2022	Chico, CA	$105.4K	—	$101.5K	—	—	—	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