Data / Nonprofits / California / Environment
Environment nonprofits in California: 3,487 registered with the IRS
3,487 environment nonprofits are registered with the IRS in California, 3,352 of them 501(c)(3) charities; the 1,361 that report revenue took in $4.31 billion. The most are in Los Angeles (168), San Diego (158), San Francisco (145). The largest by revenue: Center for Sustainable Energy ($335.6 million), Trust for Public Land ($301.2 million), Climate Imperative Foundation ($271.7 million).
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The 500 largest by revenue
| Organization | City | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Center for Sustainable Energy | San Diego | 501(c)(3) | 2001 | $335.6 million | $51.6 million | 2024-12 |
| Trust for Public Land | San Francisco | 501(c)(3) | 1978 | $301.2 million | $432.7 million | 2025-06 |
| Climate Imperative Foundation | San Francisco | 501(c)(3) | 2021 | $271.7 million | $109.6 million | 2024-12 |
| Earthjustice | San Francisco | 501(c)(3) | 1971 | $170.8 million | $315.7 million | 2025-06 |
| Social and Environmental Entrepreneurs Inc | Calabasas | 501(c)(3) | 1988 | $94.6 million | $103.2 million | 2024-12 |
| Resources Legacy Fund | Sacramento | 501(c)(3) | 1998 | $79.6 million | $151.9 million | 2024-12 |
| Save the Redwoods League | San Francisco | 501(c)(3) | 1921 | $68.1 million | $208.5 million | 2025-03 |
| Multiplier | San Francisco | 501(c)(3) | 2002 | $65.8 million | $63.4 million | 2024-12 |
| Peninsula Open Space Trust | Palo Alto | 501(c)(3) | 1977 | $62.3 million | $373.8 million | 2025-06 |
| Golden Gate National Parks Conservancy | San Francisco | 501(c)(3) | 1985 | $54.7 million | $86.7 million | 2025-09 |
| Klamath River Renewal Corporation | Berkeley | 501(c)(3) | 2016 | $49.8 million | $59.1 million | 2025-06 |
| Catalyst4 Inc | Palo Alto | 501(c)(4) | 2022 | $48.5 million | $1.10 billion | 2024-12 |
| The Living Desert | Palm Desert | 501(c)(3) | 1979 | $48 million | $170.6 million | 2025-06 |
| Grid Alternatives | Oakland | 501(c)(3) | 2014 | $46.9 million | $63.5 million | 2024-12 |
| Grid Alternatives | Oakland | 501(c)(3) | 2014 | $46 million | $38.1 million | 2024-12 |
| Land Trust of Santa Cruz County | Santa Cruz | 501(c)(3) | 1978 | $43.9 million | $87.5 million | 2025-06 |
| Carbon Mapper Inc | Pasadena | 501(c)(3) | 2020 | $42 million | $45.3 million | 2025-08 |
| Earth Island Institute Inc | Berkeley | 501(c)(3) | 1984 | $41.6 million | $44.5 million | 2025-06 |
| River Partners | Chico | 501(c)(3) | 1998 | $41.2 million | $56.8 million | 2025-06 |
| California Waterfowl Association | Roseville | 501(c)(3) | 1980 | $40.1 million | $67.5 million | 2026-03 |
| Napa County Land Trust | Napa | 501(c)(3) | 1976 | $39.7 million | $158 million | 2024-12 |
| Climate Lead Inc | San Francisco | 501(c)(3) | 2023 | $37.5 million | $44.5 million | 2024-12 |
| Sierra Club Foundation | Oakland | 501(c)(3) | 1962 | $31.9 million | $191.6 million | 2025-06 |
| Activate Global Inc | Berkeley | 501(c)(3) | 2016 | $30.6 million | $25.5 million | 2025-06 |
| JJLL Family Foundation | Irvine | 501(c)(3) | 2026 | $30.4 million | $34.2 million | 2025-12 |
| Placer Land Trust | Auburn | 501(c)(3) | 1995 | $30.1 million | $122.7 million | 2025-06 |
| Center for Natural Lands Management | Temecula | 501(c)(3) | 1995 | $28.6 million | $329 million | 2025-09 |
| Sutter Mutual Water Company | Robbins | 501(c)(12) | 2022 | $28 million | $72.5 million | 2025-09 |
| Energy Action Fund | San Francisco | 501(c)(4) | 2009 | $24.4 million | $29.3 million | 2024-12 |
| Guided Discoveries Inc | San Clemente | 501(c)(3) | 1979 | $23 million | $21.3 million | 2025-08 |
| Bay Area Environmental Research Institute | Moffett Field | 501(c)(3) | 1994 | $22.6 million | $5.8 million | 2024-09 |
| Climate Policy Initiative Inc | San Francisco | 501(c)(3) | 2009 | $22.5 million | $41.2 million | 2024-12 |
| Ecology Action of Santa Cruz | Santa Cruz | 501(c)(3) | 1979 | $22.5 million | $21.3 million | 2025-12 |
| Naturebridge | Sausalito | 501(c)(3) | 1997 | $22.3 million | $21 million | 2025-06 |
| Water Foundation | Sacramento | 501(c)(3) | 2016 | $22.3 million | $39 million | 2024-12 |
| Energy Coalition | Los Angeles | 501(c)(3) | 2004 | $20.1 million | $18.9 million | 2024-12 |
| San Francisco Estuary Institute | Richmond | 501(c)(3) | 1987 | $19.6 million | $18.2 million | 2025-06 |
| Gilroy Gardens Family Theme Park | Gilroy | 501(c)(3) | 1998 | $19.6 million | $8.8 million | 2024-12 |
| Ecology Center | Berkeley | 501(c)(3) | 1969 | $18.1 million | $8.8 million | 2024-12 |
| Treepeople Inc | Beverly Hills | 501(c)(3) | 1973 | $18 million | $19.6 million | 2024-12 |
| Big Sur Land Trust | Monterey | 501(c)(3) | 1978 | $17.8 million | $92.4 million | 2025-06 |
| Tri-City Economic Development Corporation | Union City | 501(c)(3) | 1980 | $17.6 million | $17.8 million | 2024-12 |
| Descanso Gardens Foundation | La Canada FLT | 501(c)(3) | 1962 | $17.2 million | $27.3 million | 2025-12 |
| Apparel Impact Institute | Oakland | 501(c)(3) | 2014 | $16.8 million | $19.9 million | 2025-12 |
| Er Nerr Land Fund | Klamath | 501(c)(3) | 2018 | $15.8 million | $30 million | 2025-09 |
| Digdeep Right To Water Project | Los Angeles | 501(c)(3) | 2013 | $14.6 million | $22.7 million | 2025-12 |
| Cool Effect Inc | Greenbrae | 501(c)(3) | 2016 | $14.6 million | $6 million | 2025-06 |
| Surfrider Foundation | San Clemente | 501(c)(3) | 1990 | $14.5 million | $21.6 million | 2024-12 |
| Wildlands Conservancy | Yucaipa | 501(c)(3) | 1996 | $13.8 million | $240.4 million | 2025-06 |
| Sjcog Inc | Stockton | 501(c)(3) | 2001 | $13.4 million | $226.4 million | 2025-06 |
| Island Conservation | Santa Cruz | 501(c)(3) | 1997 | $13.4 million | $13.2 million | 2024-12 |
| Calcef Innovations | Berkeley | 501(c)(3) | 2007 | $13.3 million | $27.7 million | 2024-12 |
| Santa Barbara Botanic Garden Inc | Santa Barbara | 501(c)(3) | 1942 | $13.1 million | $42 million | 2024-12 |
| The Land Trust for Santa Barbara County | Santa Barbara | 501(c)(3) | 1983 | $13 million | $29.3 million | 2025-06 |
| California Farmland Trust | Elk Grove | 501(c)(3) | 2001 | $12.8 million | $34.3 million | 2024-12 |
| The Natomas Basin Conservancy A Ca Non-Profit Public Benefit Corp | Sacramento | 501(c)(3) | 1995 | $12.6 million | $142.4 million | 2025-12 |
| Sempervirens Fund | Mountain View | 501(c)(3) | 1971 | $12.6 million | $46.9 million | 2025-06 |
| Rose Foundation for Communities and the Environment | Oakland | 501(c)(3) | 1993 | $12.6 million | $27.3 million | 2024-12 |
| Sogorea Te Land Trust | Oakland | 501(c)(3) | 2019 | $12.5 million | $54.4 million | 2024-12 |
| California Assoc of Resource Conservation Districts | Sacramento | 501(c)(3) | 1995 | $12.5 million | $5.1 million | 2025-06 |
| Spark Climate Solutions Inc | Covina | 501(c)(3) | 2022 | $12.4 million | $21.5 million | 2025-12 |
| The California Desert Land Conservancy | Joshua Tree | 501(c)(3) | 2006 | $12.2 million | $72.6 million | 2025-06 |
| Valley Can | Sacramento | 501(c)(3) | 2003 | $11.7 million | $2.3 million | 2025-06 |
| Gridlab Inc | Berkeley | 501(c)(3) | 2019 | $11.7 million | $3.1 million | 2025-12 |
| Quail Gardens Foundation Inc | Encinitas | 501(c)(3) | 1963 | $11.1 million | $15.3 million | 2025-06 |
| Western Climate Initiative Inc | Sacramento | 501(c)(3) | 2012 | $11.1 million | $31.5 million | 2025-12 |
| Pacific Environment and Resources Center | San Francisco | 501(c)(3) | 1980 | $11 million | $13.3 million | 2025-03 |
| Urban Tilth | Richmond | 501(c)(3) | 2007 | $10.8 million | $32.8 million | 2025-12 |
| Truckee Donner Land Trust | Truckee | 501(c)(3) | 1995 | $10.5 million | $91.1 million | 2025-03 |
| Mid Klamath Watershed Council | Orleans | 501(c)(3) | 2004 | $10.4 million | $7.4 million | 2025-12 |
| Yerba Buena Gardens Conservancy | San Francisco | 501(c)(3) | 2017 | $10.1 million | $140.7 million | 2025-06 |
| Mongabayorg Corporation | Menlo Park | 501(c)(3) | 2012 | $10 million | $20.7 million | 2024-12 |
| Community Conservation Centers Inc | Berkeley | 501(c)(3) | 1974 | $9.9 million | $3.6 million | 2025-06 |
| Sustainable Conservation | San Francisco | 501(c)(3) | 1996 | $9.7 million | $12.5 million | 2025-12 |
| Green Education Foundation | San Jose | 501(c)(3) | 2011 | $9.6 million | $2.7 million | 2024-12 |
| One Earth Philanthropy | Los Angeles | 501(c)(3) | 2020 | $9.6 million | $6.5 million | 2025-12 |
| Global Energy Monitor | Covina | 501(c)(3) | 2018 | $9.6 million | $5.8 million | 2024-12 |
| Strategic Energy Innovations | San Rafael | 501(c)(3) | 2000 | $9.5 million | $4.4 million | 2024-12 |
| Oceans Unmanned Inc | Santa Barbara | 501(c)(3) | 2016 | $9.5 million | $1.7 million | 2025-12 |
| California Native Plant Society | Sacramento | 501(c)(3) | 1965 | $9.5 million | $15.5 million | 2025-03 |
| Legacy Philanthropy Works | Santa Barbara | 501(c)(3) | 2015 | $9.2 million | $7.8 million | 2024-12 |
| Rainforest Action Network | San Francisco | 501(c)(3) | 1991 | $9.2 million | $11.1 million | 2025-06 |
| Climate Justice Alliance | Los Angeles | 501(c)(3) | 2020 | $9.1 million | $4.1 million | 2025-06 |
| Irvine Ranch Conservancy | Irvine | 501(c)(3) | 2017 | $9 million | $7.1 million | 2025-06 |
| Inaturalist | San Rafael | 501(c)(3) | 2023 | $9 million | $12.3 million | 2025-12 |
| Blue Forest Finance Inc | Sacramento | 501(c)(3) | 2020 | $8.9 million | $35.2 million | 2024-12 |
| Solutions Project Inc | Los Angeles | 501(c)(3) | 2014 | $8.9 million | $28.8 million | 2024-12 |
| Save Oswit Canyon Inc | Palm Springs | 501(c)(3) | 2019 | $8.9 million | $29.7 million | 2024-12 |
| Nature and Culture International | Del Mar | 501(c)(3) | 1998 | $8.8 million | $20.5 million | 2025-12 |
| John Muir Land Trust | Martinez | 501(c)(3) | 1994 | $8.8 million | $66.6 million | 2025-06 |
| Community Water Center | Visalia | 501(c)(3) | 2009 | $8.7 million | $9.1 million | 2024-12 |
| Ventura Botanical Gardens Inc | Ventura | 501(c)(3) | 2007 | $8.7 million | $14.4 million | 2025-12 |
| North Coast Resource Conservation & Development Council | Santa Rosa | 501(c)(3) | 2003 | $8.6 million | $6.5 million | 2024-12 |
| Sherman Foundation | Newport Beach | 501(c)(3) | 1952 | $8.4 million | $27.5 million | 2024-09 |
| Southern California Mountains Foundation | SN Bernrdno | 501(c)(3) | 1993 | $8.3 million | $6.9 million | 2025-09 |
| Global Alliance for Incinerator Alternatives | Berkeley | 501(c)(3) | 2014 | $8.2 million | $5.4 million | 2025-03 |
| Californias for Energy Independence | San Rafael | 501(c)(4) | 2014 | $8.1 million | $2.7 million | 2025-12 |
| Redford Center Inc | San Francisco | 501(c)(3) | 2014 | $8.1 million | $6.4 million | 2025-12 |
| Stand | San Francisco | 501(c)(3) | 2000 | $8.1 million | $3.9 million | 2024-12 |
| Communities for A Better Environment | Huntington PK | 501(c)(3) | 1988 | $8.1 million | $9.3 million | 2024-12 |
| Asian Pacific Environmental Network | Oakland | 501(c)(3) | 1997 | $8 million | $16.6 million | 2024-12 |
| Wildlife Heritage Foundation | Lincoln | 501(c)(3) | 2000 | $7.9 million | $124.2 million | 2024-12 |
| San Francisco Botanical Garden Society at Strybing Arboretum | San Francisco | 501(c)(3) | 1959 | $7.9 million | $27.3 million | 2025-06 |
| Pachamama Alliance | San Francisco | 501(c)(3) | 1997 | $7.9 million | $5.7 million | 2025-12 |
| Vote Solar | Oakland | 501(c)(3) | 2014 | $7.6 million | $13 million | 2025-12 |
| Ctrees | Pasadena | 501(c)(3) | 2022 | $7.5 million | $6.3 million | 2025-12 |
| Audubon Canyon Ranch Inc | Stinson Beach | 501(c)(3) | 1964 | $7.4 million | $42.5 million | 2025-06 |
| The Land Conservancy of San Luis Obispo County | SN Luis Obisp | 501(c)(3) | 1984 | $7.2 million | $40.5 million | 2025-06 |
| California Rural Water Association | Sacramento | 501(c)(3) | 2016 | $7.2 million | $6.6 million | 2024-12 |
| Nextgen Climate America Inc | Redwood City | 501(c)(3) | 2014 | $7.1 million | $2 million | 2024-12 |
| Council for Watershed Health | Pasadena | 501(c)(3) | 1996 | $6.9 million | $4.8 million | 2025-06 |
| Japanese Friendship Garden and Museum of San Diego | San Diego | 501(c)(3) | 1981 | $6.8 million | $30.5 million | 2025-06 |
| Whitebark Institute | Mammoth Lakes | 501(c)(3) | 2015 | $6.7 million | $3.2 million | 2024-12 |
| California Water Environment Association | Oakland | 501(c)(3) | 1983 | $6.6 million | $6.5 million | 2025-06 |
| Landpaths | Santa Rosa | 501(c)(3) | 1995 | $6.6 million | $24.6 million | 2025-06 |
| Eco Center Inc | San Juan Capo | 501(c)(3) | 2009 | $6.5 million | $7.7 million | 2024-12 |
| Truckee River Watershed Council | Truckee | 501(c)(3) | 1998 | $6.3 million | $5.2 million | 2025-12 |
| Clientearth USA Inc | Santa Monica | 501(c)(3) | 2016 | $6.3 million | $7.9 million | 2024-12 |
| The East Cut Community Benefit District | San Francisco | 501(c)(3) | 2015 | $6.2 million | $7 million | 2025-06 |
| Smith River Alliance Inc | Crescent City | 501(c)(3) | 1980 | $6.2 million | $6.1 million | 2025-12 |
| Dream Org | Oakland | 501(c)(3) | 2009 | $6 million | $23 million | 2025-12 |
| Rancho Santa Ana Botanic Garden Trustees of Rancho Santa Ana Botan | Claremont | 501(c)(3) | 1936 | $6 million | $33 million | 2025-06 |
| Planting Justice | Oakland | 501(c)(3) | 2010 | $6 million | $6.1 million | 2024-12 |
| South Coast Botanic Garden Foundation Inc | PLS VRDS PNSL | 501(c)(3) | 1962 | $5.9 million | $11.6 million | 2025-06 |
| Veloz | Sacramento | 501(c)(3) | 2018 | $5.9 million | $10.8 million | 2025-06 |
| Sonoma Ecology Center | Eldridge | 501(c)(3) | 1996 | $5.9 million | $2.5 million | 2024-12 |
| Los Angeles Neighborhood Land Trust | Los Angeles | 501(c)(3) | 2004 | $5.9 million | $28.4 million | 2025-06 |
| Central California Environmental Justice Network | Fresno | 501(c)(3) | 2022 | $5.9 million | $9.3 million | 2024-12 |
| Downtown Community Benefit District | San Francisco | 501(c)(3) | 2020 | $5.8 million | $6.5 million | 2025-06 |
| Climate Action Reserve | Los Angeles | 501(c)(3) | 2001 | $5.8 million | $3.1 million | 2025-06 |
| Los Angeles Arboretum Foundation Inc | Arcadia | 501(c)(3) | 1949 | $5.8 million | $7.3 million | 2025-06 |
| The Coral Reef Alliance | San Francisco | 501(c)(3) | 1994 | $5.7 million | $4.7 million | 2025-06 |
| Los Angeles Waterkeeper | Los Angeles | 501(c)(3) | 1994 | $5.7 million | $3 million | 2025-12 |
| Center for Resource Solutions | San Francisco | 501(c)(3) | 1997 | $5.7 million | $4.7 million | 2024-12 |
| Stewardship West | Arnold | 501(c)(3) | 2021 | $5.7 million | $1.5 million | 2024-12 |
| Climate Emergency Fund | West Hollywood | 501(c)(3) | 2019 | $5.6 million | $1.6 million | 2024-12 |
| The Ojai Valley Land Conservancy | Ojai | 501(c)(3) | 1988 | $5.6 million | $32.1 million | 2025-06 |
| Tahoe Fund | Tahoe City | 501(c)(3) | 2010 | $5.6 million | $14.9 million | 2025-03 |
| Agricultural Institute of Marin | San Rafael | 501(c)(3) | 2007 | $5.5 million | $7.6 million | 2024-12 |
| Sierra Foothill Conservancy Trust | Mariposa | 501(c)(3) | 1996 | $5.4 million | $39.2 million | 2025-06 |
| Kokua Hawaii Foundation | San Rafael | 501(c)(3) | 2004 | $5.3 million | $21.7 million | 2025-06 |
| Santa Monica Bay Foundation | Playa Del Rey | 501(c)(3) | 1991 | $5.3 million | $2.7 million | 2025-06 |
| Heal the Bay | Santa Monica | 501(c)(3) | 1987 | $5.3 million | $6.6 million | 2025-09 |
| Joshua Tree National Park Assoc | Twentynin PLM | 501(c)(3) | 1967 | $5.2 million | $4.7 million | 2025-09 |
| Scott River Watershed Council | Etna | 501(c)(3) | 2012 | $5.2 million | $3.6 million | 2024-12 |
| Friends of the Urban Forest | San Francisco | 501(c)(3) | 1981 | $5.1 million | $3.3 million | 2025-06 |
| Global Conservation | Portola Vally | 501(c)(3) | 2016 | $5.1 million | $289,540 | 2024-12 |
| The Breakthrough Institute | Berkeley | 501(c)(3) | 2017 | $5.1 million | $6 million | 2025-12 |
| The Trust for Hidden Villa | Los Altos HLS | 501(c)(3) | 1960 | $5 million | $18.3 million | 2025-08 |
| Save the Bay | Oakland | 501(c)(3) | 1964 | $5 million | $6.8 million | 2025-09 |
| Amazon Frontlines | San Francisco | 501(c)(3) | 2016 | $5 million | $4.9 million | 2024-12 |
| Hollywood Beautification Team | Sunland | 501(c)(3) | 1993 | $4.9 million | $6.5 million | 2024-12 |
| Sustainable Ocean Alliance Inc | San Francisco | 501(c)(3) | 2018 | $4.9 million | $7 million | 2024-12 |
| JMT Wilderness Conservancy | Truckee | 501(c)(3) | 2020 | $4.9 million | $5.4 million | 2025-09 |
| Wildcoast | Del Mar | 501(c)(3) | 2000 | $4.9 million | $8.1 million | 2024-12 |
| Citizens Climate Education Corp | Coronado | 501(c)(3) | 2010 | $4.9 million | $3.4 million | 2025-12 |
| Sequoia Parks Conservancy | Three Rivers | 501(c)(3) | 1970 | $4.8 million | $7.6 million | 2024-12 |
| Just Transition Alliance | San Diego | 501(c)(3) | 2001 | $4.6 million | $2.6 million | 2024-12 |
| Shelterwood Collective | Cazadero | 501(c)(3) | 2021 | $4.5 million | $8.7 million | 2025-12 |
| Physicians Scientists and Engineers for Sustainable and Healthy Ene | Oakland | 501(c)(3) | 2012 | $4.5 million | $5.2 million | 2024-12 |
| Solidaridad North America | Berkeley | 501(c)(3) | 2013 | $4.4 million | $3 million | 2024-12 |
| Ten Strands | San Francisco | 501(c)(3) | 2011 | $4.4 million | $4.1 million | 2025-06 |
| Center for Land-Based Learning | Woodland | 501(c)(3) | 2001 | $4.4 million | $5.4 million | 2025-06 |
| North East Trees Inc | Los Angeles | 501(c)(3) | 2020 | $4.4 million | $4.2 million | 2024-12 |
| Flourish Agenda Inc | Oakland | 501(c)(3) | 1995 | $4.4 million | $3.4 million | 2024-12 |
| Parks California | Sacramento | 501(c)(3) | 2019 | $4.4 million | $17.9 million | 2025-12 |
| Mattole Restoration Council | Petrolia | 501(c)(3) | 1986 | $4.3 million | $2 million | 2025-06 |
| Nature Collective | Solana Beach | 501(c)(3) | 1993 | $4.3 million | $15.4 million | 2024-12 |
| Residential Energy Services Network Inc | Moorpark | 501(c)(3) | 1988 | $4.3 million | $4.8 million | 2024-12 |
| Redwood Forest Foundation Inc | Fort Bragg | 501(c)(3) | 2000 | $4.2 million | $88.6 million | 2025-12 |
| Ventura Land Trust | Ventura | 501(c)(3) | 2003 | $4.2 million | $14.8 million | 2024-12 |
| Carbonplan | San Francisco | 501(c)(3) | 2020 | $4.2 million | $7 million | 2025-12 |
| Baykeeper | Oakland | 501(c)(3) | 1987 | $4.1 million | $4 million | 2025-06 |
| Fred M Van Eck Forest Foundation for Purdue University | San Francisco | 501(c)(3) | 2002 | $4.1 million | $21.6 million | 2024-12 |
| Sequoia Riverlands Trust | Visalia | 501(c)(3) | 1993 | $4.1 million | $49.4 million | 2024-12 |
| Sustainable Surf | Manhattan BCH | 501(c)(3) | 2012 | $4 million | $2.9 million | 2024-12 |
| Marin Art and Garden Center | Ross | 501(c)(3) | 1948 | $4 million | $8.2 million | 2025-12 |
| Amazon Watch | Oakland | 501(c)(3) | 1999 | $4 million | $3.6 million | 2025-06 |
| Point Reyes National Seashore Association | Point Reyes Station | 501(c)(3) | 1970 | $4 million | $6.5 million | 2026-03 |
| Santa Ana Watershed Association of RCDS | Riverside | 501(c)(3) | 2003 | $4 million | $4.3 million | 2024-12 |
| Plant-For-The-Planet Us | Santa Fe Springs | 501(c)(3) | 2016 | $3.9 million | $490,322 | 2024-06 |
| International Conservation Foundation | Riverside | 501(c)(3) | 2022 | $3.9 million | $238,130 | 2025-06 |
| California Environmental Justice Alliance | Los Angeles | 501(c)(3) | 2021 | $3.9 million | $6.3 million | 2025-12 |
| People for Open Space Inc | Oakland | 501(c)(3) | 1966 | $3.8 million | $6.7 million | 2025-09 |
| San Joaquin Parkway & Conservation Inc Trust | Fresno | 501(c)(3) | 1993 | $3.7 million | $20.6 million | 2025-12 |
| Northshore Environmental Conservancy | Laguna Beach | 501(c)(5) | 2022 | $3.7 million | $3.3 million | 2025-12 |
| Conservation Strategy Fund | Arcata | 501(c)(3) | 1998 | $3.7 million | $3.7 million | 2024-12 |
| Transition Habitat Conservancy | Pinon Hills | 501(c)(3) | 2006 | $3.7 million | $35.9 million | 2024-12 |
| Barrel Bag | Mill Valley | 501(c)(3) | 2018 | $3.7 million | $0 | 2024-12 |
| Reflective Inc | San Francisco | 501(c)(3) | 2024 | $3.6 million | $3 million | 2024-12 |
| Golden Gate Bird Alliance | Berkeley | 501(c)(3) | 1952 | $3.6 million | $3.4 million | 2025-06 |
| California Green Building Council Usgbc California | Los Angeles | 501(c)(3) | 2004 | $3.6 million | $1.9 million | 2024-12 |
| Pacoima Beautiful | Pacoima | 501(c)(3) | 1999 | $3.6 million | $6.5 million | 2025-06 |
| Pepperwood Foundation | Santa Rosa | 501(c)(3) | 2006 | $3.6 million | $36 million | 2025-06 |
| Accountability Counsel | San Francisco | 501(c)(3) | 2014 | $3.5 million | $3.1 million | 2025-06 |
| Adopt A Charger Inc | PLS VRDS Est | 501(c)(3) | 2012 | $3.5 million | $293,279 | 2025-12 |
| Ca Good Energy | Sacramento | 501(c)(3) | 2025 | $3.5 million | $3.5 million | 2024-12 |
| Pollinator Partnership | San Francisco | 501(c)(3) | 1998 | $3.5 million | $6.2 million | 2024-12 |
| Endangered Habitats Conservancy | San Diego | 501(c)(3) | 2007 | $3.4 million | $70.5 million | 2024-12 |
| Clear Lake Environmental Research Center | Lakeport | 501(c)(3) | 2015 | $3.4 million | $1.4 million | 2024-12 |
| Feather River Land Trust | Quincy | 501(c)(3) | 2000 | $3.4 million | $30.6 million | 2025-06 |
| Community Environmental Council Inc | Santa Barbara | 501(c)(3) | 1970 | $3.4 million | $9.6 million | 2024-12 |
| California Stormwater Quality Association | Redondo Beach | 501(c)(3) | 2003 | $3.4 million | $3.4 million | 2025-12 |
| Ag Land Trust | Salinas | 501(c)(3) | 1987 | $3.4 million | $42 million | 2025-06 |
| California Environmental Voters Education Fund | Oakland | 501(c)(3) | 1996 | $3.4 million | $2 million | 2025-01 |
| Environment California Inc | Sacramento | 501(c)(4) | 2004 | $3.4 million | $27 million | 2025-08 |
| Urban Adamah | Berkeley | 501(c)(3) | 2011 | $3.4 million | $17 million | 2025-12 |
| Environmental Nature Center | Newport Beach | 501(c)(3) | 1972 | $3.3 million | $17.9 million | 2025-06 |
| Sierra Buttes Trail Stewardship | Quincy | 501(c)(3) | 2005 | $3.3 million | $1.8 million | 2025-12 |
| When Justice PBC | Lafayette | 501(c)(3) | 2025 | $3.3 million | $722,488 | 2025-12 |
| Climate Resolve | Los Angeles | 501(c)(3) | 2017 | $3.3 million | $1.4 million | 2025-06 |
| San Francisco Community Land Trust | San Francisco | 501(c)(3) | 2004 | $3.3 million | $71.6 million | 2024-12 |
| Coastal Quest | Berkeley | 501(c)(3) | 2000 | $3.3 million | $1.6 million | 2024-12 |
| Central Coast Water Quality Preservation Inc | Salinas | 501(c)(3) | 2004 | $3.2 million | $3.4 million | 2024-12 |
| Santa Cruz Mountains Trail Stewardship | Santa Cruz | 501(c)(3) | 2001 | $3.2 million | $1.7 million | 2024-12 |
| Latino Equity Advocacy & Policy Institute - the Leap Institute | Huron | 501(c)(3) | 2018 | $3.2 million | $2.3 million | 2025-06 |
| Pacific Coast Fish Wildlife and Wetlands Assoc | Arcata | 501(c)(3) | 1996 | $3.2 million | $754,048 | 2025-12 |
| North American Sustainable Refrigeration Council | Mill Valley | 501(c)(3) | 2015 | $3.2 million | $1.7 million | 2025-12 |
| Palos Verdes Peninsula Land Conservancy | RCH Palos VRD | 501(c)(3) | 1993 | $3.2 million | $14.1 million | 2024-12 |
| Mendocino Coast Botanical Gardens Corporation | Fort Bragg | 501(c)(3) | 1986 | $3.2 million | $3.6 million | 2025-03 |
| Oceanic Preservation Society | Greenbrae | 501(c)(3) | 2013 | $3.2 million | $5.7 million | 2024-12 |
| Re-Volv | San Francisco | 501(c)(3) | 2011 | $3.2 million | $9.8 million | 2025-12 |
| Pesticide Action Network North America Regional Center | Berkeley | 501(c)(3) | 1985 | $3.2 million | $2.8 million | 2025-03 |
| Santa Lucia Conservancy | Carmel | 501(c)(3) | 1998 | $3.1 million | $72.6 million | 2024-12 |
| Exploring New Horizons | Santa Cruz | 501(c)(3) | 1980 | $3.1 million | $424,859 | 2025-06 |
| Southwest Resource Management Association | Riverside | 501(c)(3) | 2012 | $3.1 million | $50.8 million | 2025-06 |
| Martis Fund | Truckee | 501(c)(3) | 2008 | $3.1 million | $17.9 million | 2024-12 |
| Orange County Coastkeeper | Costa Mesa | 501(c)(3) | 1999 | $3 million | $3.8 million | 2025-12 |
| Amah Mutsun Land Trust | Santa Cruz | 501(c)(3) | 2018 | $2.9 million | $9.1 million | 2024-12 |
| I Love A Clean San Diego County Inc | San Diego | 501(c)(3) | 1974 | $2.9 million | $2.5 million | 2025-12 |
| Theodore Payne Foundation for Wild Flowers & Native Plants Inc | Sun Valley | 501(c)(3) | 1962 | $2.9 million | $4.3 million | 2025-08 |
| California Ocean Science Trust | Sacramento | 501(c)(3) | 2005 | $2.9 million | $14.2 million | 2025-09 |
| Elizabeth F Gamble Garden | Palo Alto | 501(c)(3) | 1986 | $2.8 million | $11.4 million | 2025-06 |
| San Dieguito River Valley Land Conservancy | San Diego | 501(c)(3) | 2025 | $2.8 million | $12.1 million | 2025-06 |
| Center for Creative Land Recycling | Berkeley | 501(c)(3) | 1998 | $2.8 million | $1.7 million | 2025-12 |
| Daily Acts Organization | Petaluma | 501(c)(3) | 2006 | $2.8 million | $1.6 million | 2024-12 |
| Maidu Summit Consortium | Chester | 501(c)(3) | 2010 | $2.7 million | $1.4 million | 2025-12 |
| Coastside Land Trust | Half Moon Bay | 501(c)(3) | 1998 | $2.7 million | $12.8 million | 2025-12 |
| Sierra Nevada Alliance | S Lake Tahoe | 501(c)(3) | 1998 | $2.7 million | $2 million | 2025-06 |
| Valley Water Collaborative | Modesto | 501(c)(3) | 2021 | $2.7 million | $1.7 million | 2025-12 |
| Fibershed | San Geronimo | 501(c)(3) | 2014 | $2.7 million | $2.1 million | 2024-12 |
| Oil & Gas Action Network | Berkeley | 501(c)(3) | 2017 | $2.6 million | $1.9 million | 2024-12 |
| Our City Forest | San Jose | 501(c)(3) | 1994 | $2.6 million | $2.9 million | 2025-06 |
| Plug in America | Los Angeles | 501(c)(3) | 2008 | $2.6 million | $1.4 million | 2024-12 |
| Sacramento Tree Foundation Incorporated | Sacramento | 501(c)(3) | 1982 | $2.6 million | $15.8 million | 2025-06 |
| Earth Genome | Los Altos | 501(c)(3) | 2015 | $2.6 million | $2.3 million | 2024-12 |
| Sustainable Fishery Advocates | Santa Cruz | 501(c)(3) | 2003 | $2.6 million | $2.4 million | 2025-12 |
| Canopy | Palo Alto | 501(c)(3) | 2002 | $2.6 million | $1.2 million | 2025-06 |
| California Foundation On the Environment and the Economy | Sacramento | 501(c)(3) | 1979 | $2.6 million | $3.8 million | 2024-12 |
| Climate Cabinet Education | San Francisco | 501(c)(3) | 2024 | $2.6 million | $3.4 million | 2024-12 |
| Gridworks Organization | Berkeley | 501(c)(3) | 2014 | $2.6 million | $1.5 million | 2024-12 |
| Eel River Recovery Project Inc | Loleta | 501(c)(3) | 2016 | $2.6 million | $233,465 | 2025-12 |
| California Council of Land Trusts | Sacramento | 501(c)(3) | 2011 | $2.5 million | $896,558 | 2025-12 |
| Seventh Generation Advisors | Santa Monica | 501(c)(3) | 2007 | $2.5 million | $13 million | 2025-02 |
| Watsonville Wetlands Watch | Watsonville | 501(c)(3) | 1999 | $2.5 million | $3.9 million | 2024-12 |
| Climate Action Systems Inc | Bolinas | 501(c)(3) | 2020 | $2.5 million | $0 | 2023-12 |
| Grassroots Ecology | Palo Alto | 501(c)(3) | 2018 | $2.5 million | $1.7 million | 2025-06 |
| San Diego Bird Alliance | San Diego | 501(c)(3) | 1965 | $2.5 million | $8.2 million | 2025-05 |
| Nature for All | Monterey Park | 501(c)(3) | 2019 | $2.5 million | $1.5 million | 2025-06 |
| Acterra Action for A Healthy Planet | Palo Alto | 501(c)(3) | 1973 | $2.4 million | $1.7 million | 2025-06 |
| Inner City Education Family | Los Angeles | 501(c)(3) | 2014 | $2.4 million | $26.9 million | 2025-06 |
| Regional Water Management Foundation A Subsidiary of the | Aptos | 501(c)(3) | 2008 | $2.4 million | $2.1 million | 2024-12 |
| Rivers & Lands Conservancy | Riverside | 501(c)(3) | 1989 | $2.4 million | $69.9 million | 2025-03 |
| American River Conservancy | Coloma | 501(c)(3) | 1994 | $2.3 million | $51.3 million | 2024-12 |
| Hydrologic Research Center | San Diego | 501(c)(3) | 1993 | $2.3 million | $1.1 million | 2025-09 |
| Vida Verde Nature Education | San Gregorio | 501(c)(3) | 2002 | $2.3 million | $7.8 million | 2024-05 |
| Tule Basin Water Quality Coalition | Visalia | 501(c)(6) | 2025 | $2.3 million | $1.5 million | 2025-06 |
| Water Education Foundation | Sacramento | 501(c)(3) | 1977 | $2.3 million | $3.2 million | 2024-12 |
| California Clean Energy Fund | Berkeley | 501(c)(3) | 2025 | $2.3 million | $4.8 million | 2024-12 |
| Golden State Land Conservancy Incorporated | Santa Rosa | 501(c)(3) | 2000 | $2.3 million | $11.9 million | 2024-12 |
| San Diego Coastkeeper | San Diego | 501(c)(3) | 1995 | $2.3 million | $2.9 million | 2024-12 |
| Ruth Bancroft Garden Inc | Walnut Creek | 501(c)(3) | 1994 | $2.3 million | $5.1 million | 2025-12 |
| Tijuana Estuary Foundation | Imperial BCH | 501(c)(3) | 1981 | $2.3 million | $162 million | 2024-12 |
| Environmental Health Coalition | National City | 501(c)(3) | 1983 | $2.2 million | $1 million | 2025-06 |
| White Buffalo Land Trust | Santa Barbara | 501(c)(3) | 2018 | $2.2 million | $4.4 million | 2024-12 |
| Story of Stuff Project | Berkeley | 501(c)(3) | 2014 | $2.2 million | $1.4 million | 2024-12 |
| San Diego Canyonlands Inc | San Diego | 501(c)(3) | 2008 | $2.2 million | $944,743 | 2025-06 |
| West Oakland Environmental Indicators Project | Oakland | 501(c)(3) | 2013 | $2.2 million | $3.3 million | 2024-12 |
| Marin Audubon Society Incorporated | Mill Valley | 501(c)(3) | 1963 | $2.2 million | $9.5 million | 2025-06 |
| Climate Registry | Los Angeles | 501(c)(3) | 2007 | $2.2 million | $1.4 million | 2025-12 |
| Mendocino Land Trust Incorporated | Fort Bragg | 501(c)(3) | 1977 | $2.2 million | $14 million | 2025-06 |
| Northern California Resource Center | Fort Jones | 501(c)(3) | 2002 | $2.2 million | $843,567 | 2024-12 |
| Sierra Streams Institute | Nevada City | 501(c)(3) | 1999 | $2.2 million | $1.3 million | 2025-12 |
| Civilization Research Initiative | Carlsbad | 501(c)(3) | 2020 | $2.2 million | $483,228 | 2024-12 |
| International Rivers Network | Oakland | 501(c)(3) | 1992 | $2.2 million | $1.9 million | 2025-12 |
| Coalition for Clean Air | Los Angeles | 501(c)(3) | 1971 | $2.1 million | $1.5 million | 2025-06 |
| San Francisco Bay Bird Observatory | San Jose | 501(c)(3) | 1982 | $2.1 million | $1.1 million | 2025-12 |
| Living Coast Discovery Center | Chula Vista | 501(c)(3) | 1997 | $2.1 million | $1.6 million | 2025-06 |
| Arroyos & Foothills Conservancy | Pasadena | 501(c)(3) | 2000 | $2.1 million | $6.1 million | 2025-06 |
| Eastern Sierra Land Trust | Bishop | 501(c)(3) | 2001 | $2.1 million | $16 million | 2025-12 |
| Calaid Foundation | San Gabriel | 501(c)(3) | 2025 | $2 million | $2 million | 2025-12 |
| Redwood Parks Conservancy | Crescent City | 501(c)(3) | 1986 | $2 million | $1.7 million | 2024-12 |
| Outward Bound Adventures Inc | Pasadena | 501(c)(3) | 1969 | $2 million | $1.9 million | 2024-12 |
| David Brower Center | Berkeley | 501(c)(3) | 2002 | $2 million | $20.5 million | 2025-12 |
| Cosumnes Culture and Waterways | Placerville | 501(c)(3) | 2014 | $2 million | $2 million | 2025-12 |
| Alliance for Advancing Biomedical Research | Oakland | 501(c)(3) | 2023 | $2 million | $2.8 million | 2025-09 |
| Explore Ecology | Santa Barbara | 501(c)(3) | 2006 | $2 million | $892,617 | 2024-12 |
| Center for Plant Conservation Inc | Wildomar | 501(c)(3) | 1984 | $2 million | $11.9 million | 2025-12 |
| Enrich La | Los Angeles | 501(c)(3) | 2011 | $2 million | $2.4 million | 2025-12 |
| Friends of the Water Conservationgarden | El Cajon | 501(c)(3) | 2006 | $2 million | $1.4 million | 2023-06 |
| Sanctuary Forest Inc | Whitethorn | 501(c)(3) | 1982 | $2 million | $6.5 million | 2024-12 |
| Guadalupe River Park Conservancy | San Jose | 501(c)(3) | 1988 | $2 million | $1.8 million | 2024-12 |
| Yosemite-Sequoia Resource Conservation & Development Council | Oakhurst | 501(c)(3) | 2004 | $1.9 million | $220,968 | 2025-09 |
| Russian Riverkeeper | Healdsburg | 501(c)(3) | 1994 | $1.9 million | $1.2 million | 2025-12 |
| Berkeley Earth Inc | Berkeley | 501(c)(3) | 2013 | $1.9 million | $1.7 million | 2024-12 |
| Roots of Success | Berkeley | 501(c)(3) | 2022 | $1.9 million | $2.8 million | 2025-12 |
| Laguna Canyon Foundation | Laguna Beach | 501(c)(3) | 1995 | $1.9 million | $3.6 million | 2025-06 |
| Groundwork San Diego - Chollas Creek | San Diego | 501(c)(3) | 2007 | $1.9 million | $1.9 million | 2025-06 |
| Lakesides River Park Conservancy | Lakeside | 501(c)(3) | 2002 | $1.8 million | $14.1 million | 2025-12 |
| Vallejo Community Organizations Recycling Inc | Vallejo | 501(c)(3) | 1986 | $1.8 million | $1 million | 2025-06 |
| California Alliance for Community Composting | San Francisco | 501(c)(3) | 2022 | $1.8 million | $516,811 | 2024-12 |
| Undauntedk12 | San Francisco | 501(c)(3) | 2023 | $1.8 million | $2.3 million | 2025-12 |
| Huntington Beach Wetlands Conservancy | Huntingtn BCH | 501(c)(3) | 1986 | $1.8 million | $10.1 million | 2025-12 |
| Friends of El Mirage | California City | 501(c)(3) | 2001 | $1.8 million | $1.1 million | 2025-12 |
| The Go Green Initiative Association | Pleasanton | 501(c)(3) | 2004 | $1.8 million | $378,751 | 2025-12 |
| Fallbrook Land Conservancy | Fallbrook | 501(c)(3) | 1989 | $1.8 million | $29.1 million | 2024-12 |
| Sonoma Land Trust | Santa Rosa | 501(c)(3) | 1976 | $1.8 million | $70.3 million | 2025-06 |
| Outdoor Afro | Oakland | 501(c)(3) | 2015 | $1.8 million | $5.1 million | 2025-12 |
| Ore-Cal Resource Conservation and Development Area Council | Yreka | 501(c)(3) | 1994 | $1.8 million | $1.4 million | 2024-12 |
| Solar Cookers International | Sacramento | 501(c)(3) | 1993 | $1.8 million | $3 million | 2025-06 |
| Asset Network for Educationworldwide Inc | San Marino | 501(c)(3) | 2007 | $1.8 million | $50,433 | 2024-12 |
| San Joaquin Valley Clean Energy Organization | Fresno | 501(c)(3) | 2008 | $1.8 million | $1.2 million | 2025-06 |
| Labstart Innovations Inc | Oakland | 501(c)(3) | 2022 | $1.8 million | $1.2 million | 2025-12 |
| Climate Rights International | Berkeley | 501(c)(3) | 2022 | $1.8 million | $2.2 million | 2024-12 |
| California Council of Land Trusts Action Fund | Sacramento | 501(c)(4) | 2009 | $1.8 million | $183,199 | 2025-06 |
| The Watershed Project | Richmond | 501(c)(3) | 1997 | $1.7 million | $1.2 million | 2025-06 |
| Channel Islands Restoration | Santa Barbara | 501(c)(3) | 2007 | $1.7 million | $820,222 | 2024-12 |
| Friends of Jawbone Canyon | California City | 501(c)(3) | 1998 | $1.7 million | $1.8 million | 2025-12 |
| Shasta Land Trust | Redding | 501(c)(3) | 2000 | $1.7 million | $4.8 million | 2025-06 |
| California Local Conservation Corps Foundation | Los Angeles | 501(c)(3) | 2023 | $1.7 million | $829,002 | 2025-06 |
| Growing Communities Inc | Los Angeles | 501(c)(3) | 2022 | $1.7 million | $1.5 million | 2025-12 |
| Energy Peace Partners | Sacramento | 501(c)(3) | 2023 | $1.7 million | $1.5 million | 2025-12 |
| Salmon River Restoration Council | Sawyers Bar | 501(c)(3) | 1997 | $1.7 million | $207,525 | 2025-12 |
| Turtle Island Restoration Network | Forest Knolls | 501(c)(3) | 1997 | $1.7 million | $4.3 million | 2025-06 |
| Ridges To Riffles Indigenous Conservation Group | Eureka | 501(c)(3) | 2024 | $1.7 million | $1.1 million | 2025-12 |
| Happy Goat Inc | Mariposa | 501(c)(3) | 2021 | $1.7 million | $4.2 million | 2025-12 |
| Reef Check Foundation | Westlake Village | 501(c)(3) | 2001 | $1.6 million | $454,860 | 2024-12 |
| Jack London Park Partners | Glen Ellen | 501(c)(3) | 1977 | $1.6 million | $2.1 million | 2024-12 |
| The California Land Conservancy | Laguna Beach | 501(c)(3) | 2001 | $1.6 million | $4.4 million | 2025-12 |
| The Reuse People of America Inc | Oakland | 501(c)(3) | 1999 | $1.6 million | $1.5 million | 2024-12 |
| Native American Land Conservancy | Banning | 501(c)(3) | 1999 | $1.6 million | $4.1 million | 2024-12 |
| Clovis Botanical Garden | Clovis | 501(c)(3) | 1995 | $1.6 million | $2.5 million | 2025-10 |
| Environmental Media Association Inc | Los Angeles | 501(c)(3) | 1995 | $1.6 million | $198,775 | 2025-12 |
| Civilization Works | Albany | 501(c)(3) | 2017 | $1.6 million | $348,405 | 2024-12 |
| Tribal Eco Restoration Alliance | Upper Lake | 501(c)(3) | 2024 | $1.6 million | $1.2 million | 2024-12 |
| Terra Fuego Resource Foundation | Chico | 501(c)(3) | 2015 | $1.6 million | $463,740 | 2024-12 |
| LL Green From Garbage | Mountain View | 501(c)(3) | 2023 | $1.6 million | $51,392 | 2024-12 |
| Ecolife Conservation | Carlsbad | 501(c)(3) | 2004 | $1.6 million | $980,848 | 2024-12 |
| Los Padres Forest Watch | Santa Barbara | 501(c)(3) | 2004 | $1.6 million | $1.1 million | 2024-12 |
| Bear Yuba Land Trust | Grass Valley | 501(c)(3) | 1996 | $1.6 million | $11.4 million | 2024-12 |
| Center for Ecoliteracy | Berkeley | 501(c)(3) | 1983 | $1.6 million | $1.8 million | 2024-12 |
| Solana Center for Environmental Innovation | Encinitas | 501(c)(3) | 1984 | $1.6 million | $1.3 million | 2025-06 |
| Hollywood Media District Properties Owners Association | Los Angeles | 501(c)(4) | 2003 | $1.6 million | $101,965 | 2025-12 |
| Los Penaquitos Lagoon Foundation | Cardiff | 501(c)(3) | 1984 | $1.6 million | $358,410 | 2025-12 |
| The Sierra Fund | Auburn | 501(c)(3) | 2002 | $1.6 million | $427,169 | 2024-12 |
| Friends of the Dunes | Arcata | 501(c)(3) | 1996 | $1.5 million | $3.4 million | 2024-12 |
| Escondido Creek Conservancy | Escondido | 501(c)(3) | 1996 | $1.5 million | $63.5 million | 2024-12 |
| Ecological Life Systems Institute Incorporated | San Diego | 501(c)(3) | 2014 | $1.5 million | $1.3 million | 2022-12 |
| Climate Neutral | San Francisco | 501(c)(3) | 2019 | $1.5 million | $905,340 | 2024-12 |
| Circle of Life Connections | Albany | 501(c)(3) | 2002 | $1.5 million | $1 million | 2025-12 |
| Restore the Delta | Stockton | 501(c)(3) | 2014 | $1.5 million | $311,359 | 2024-12 |
| Eastern Sierra Interpretive Association | Bishop | 501(c)(3) | 1973 | $1.4 million | $759,453 | 2024-12 |
| Environmental Traveling Companions | San Francisco | 501(c)(3) | 1975 | $1.4 million | $3.4 million | 2025-12 |
| Death Valley Natural History | Death Valley | 501(c)(3) | 1972 | $1.4 million | $1.1 million | 2024-09 |
| Kings Water Alliance | Fresno | 501(c)(3) | 2022 | $1.4 million | $1.4 million | 2025-06 |
| Tataviam Land Conservancy | San Fernando | 501(c)(3) | 2019 | $1.4 million | $1.4 million | 2025-12 |
| Monterey County Land Watch | Salinas | 501(c)(3) | 1997 | $1.4 million | $3 million | 2024-12 |
| Anza Borrego Desert Natural History Association | Borrego SPGS | 501(c)(3) | 1971 | $1.4 million | $3.2 million | 2025-12 |
| National Water Research Institute | Fountain Vly | 501(c)(3) | 1993 | $1.4 million | $803,021 | 2025-06 |
| Friends of the Los Angeles River | Los Angeles | 501(c)(3) | 1994 | $1.4 million | $702,451 | 2025-07 |
| Natural Communities Coalition | Irvine | 501(c)(3) | 1998 | $1.4 million | $33 million | 2025-09 |
| Save the Waves Coalition | Santa Cruz | 501(c)(3) | 2003 | $1.4 million | $1.1 million | 2025-12 |
| California Water Efficiency Partnership | Sacramento | 501(c)(3) | 1995 | $1.3 million | $2 million | 2024-12 |
| Spatial Informatics Group Natural Assets Laboratory | Pleasanton | 501(c)(3) | 2014 | $1.3 million | $3.1 million | 2025-12 |
| If Not Us Then Who | Tarzana | 501(c)(3) | 2017 | $1.3 million | $399,174 | 2024-12 |
| Climate and Wildfire Institute Inc | San Francisco | 501(c)(3) | 2021 | $1.3 million | $4 million | 2024-12 |
| Imagine H2o Inc | San Francisco | 501(c)(3) | 2008 | $1.3 million | $3.4 million | 2024-12 |
| Bay Nature Institute | Berkeley | 501(c)(3) | 2004 | $1.3 million | $672,642 | 2025-12 |
| Ojai Raptor Center | Oak View | 501(c)(3) | 2001 | $1.3 million | $1.3 million | 2025-12 |
| Coalition for Urban-Rural Environmental Stewardship | Sacramento | 501(c)(3) | 1998 | $1.3 million | $526,654 | 2025-12 |
| Napa Valley Vine Trail Coalition | Napa | 501(c)(3) | 2009 | $1.3 million | $3.8 million | 2025-06 |
| Green Science Policy Institute | Berkeley | 501(c)(3) | 2006 | $1.3 million | $3.7 million | 2025-12 |
| Everybody Solar Inc | Novato | 501(c)(3) | 2012 | $1.3 million | $1.3 million | 2024-12 |
| Silicon Valley Leadership Group Foundation | San Jose | 501(c)(3) | 2002 | $1.3 million | $1.8 million | 2024-12 |
| Hydrogen Fuel Cell Partnership | W Sacramento | 501(c)(3) | 2024 | $1.3 million | $1.4 million | 2024-12 |
| Sustainable Solano | Benicia | 501(c)(3) | 2013 | $1.2 million | $618,369 | 2024-12 |
| Cannabis for Conservation | McKinleyville | 501(c)(3) | 2018 | $1.2 million | $357,296 | 2024-12 |
| Offshore Wind California | Menlo Park | 501(c)(6) | 2002 | $1.2 million | $582,816 | 2024-12 |
| Yolo County Farm Bureau Education Corporation | Woodland | 501(c)(3) | 2005 | $1.2 million | $578,854 | 2024-12 |
| Mammoth Lakes Recreation | Mammoth Lakes | 501(c)(3) | 2014 | $1.2 million | $439,002 | 2025-06 |
| California Urban Water Agencies | Walnut Creek | 501(c)(3) | 1993 | $1.2 million | $691,112 | 2025-06 |
| Redwood Coast Land Conservancy | Gualala | 501(c)(3) | 2025 | $1.2 million | $5.3 million | 2025-12 |
| Wild Farm Alliance | Aromas | 501(c)(3) | 2004 | $1.2 million | $628,282 | 2025-12 |
| People Resources and Conservation Foundation | Los Angeles | 501(c)(3) | 1996 | $1.2 million | $591,185 | 2024-12 |
| Tule Basin Land and Water Conservation Trust | Tulare | 501(c)(3) | 2020 | $1.2 million | $5.5 million | 2025-12 |
| Permit Power Education Fund | San Francisco | 501(c)(3) | 2024 | $1.2 million | $304,485 | 2024-12 |
| Pesticide Applicators Professional Association Inc | Sacramento | 501(c)(3) | 1992 | $1.2 million | $918,430 | 2025-12 |
| Friends of Scrap Inc | San Francisco | 501(c)(3) | 1979 | $1.2 million | $692,048 | 2024-12 |
| Lasting Adventures Incorporated | Groveland | 501(c)(3) | 2008 | $1.2 million | $434,779 | 2025-12 |
| Eastern Sierra Conservation Corps | Bishop | 501(c)(3) | 2016 | $1.2 million | $275,737 | 2024-12 |
| American River Natural History Association | Carmichael | 501(c)(3) | 1981 | $1.2 million | $904,994 | 2025-06 |
| My Green Lab Corp | San Diego | 501(c)(3) | 2014 | $1.2 million | $2.4 million | 2024-12 |
| One Cool Earth | SN Luis Obisp | 501(c)(3) | 2001 | $1.2 million | $695,129 | 2025-12 |
| Crooked Org | Los Angeles | 501(c)(3) | 2025 | $1.2 million | $727,069 | 2024-12 |
| Wildlife Health Center Foundation | Davis | 501(c)(3) | 2000 | $1.1 million | $2.3 million | 2024-12 |
| Tree San Diego | San Diego | 501(c)(3) | 2014 | $1.1 million | $1.6 million | 2025-12 |
| Yolo Land Trust | Woodland | 501(c)(3) | 1990 | $1.1 million | $10.5 million | 2024-12 |
| Energy and Policy Institute | El Verano | 501(c)(3) | 2024 | $1.1 million | $418,320 | 2024-12 |
| Blue Sky Sustainable Living Center | New Cuyama | 501(c)(3) | 2014 | $1.1 million | $1.4 million | 2025-12 |
| Yolo Basin Foundation | Davis | 501(c)(3) | 1995 | $1.1 million | $2.8 million | 2025-06 |
| Power Environmental Energy Research Institute | Covina | 501(c)(3) | 2009 | $1.1 million | $439,160 | 2025-05 |
| Save California Salmon | Orleans | 501(c)(3) | 2022 | $1.1 million | $1.3 million | 2024-12 |
| Santa Barbara Channel Keeper | Santa Barbara | 501(c)(3) | 2002 | $1.1 million | $1.5 million | 2024-12 |
| Civita Public Maintenance Corporation | San Diego | 501(c)(4) | 2015 | $1.1 million | $143,675 | 2025-06 |
| Environmentalism Through Inspiration & Non Violent Action | Marina DL Rey | 501(c)(3) | 1998 | $1.1 million | $2.2 million | 2024-12 |
| Hammond Climate Solutions Foundation | La Jolla | 501(c)(3) | 2021 | $1.1 million | $1.2 million | 2024-12 |
| Actai Global | Santa Monica | 501(c)(3) | 2014 | $1.1 million | $685,540 | 2024-12 |
| California Resource Rec Assoc | W Sacramento | 501(c)(3) | 1976 | $1 million | $889,918 | 2024-12 |
| Center for Energy Efficiency and Renewable Technologies | Sacramento | 501(c)(3) | 1992 | $1 million | $282,556 | 2024-12 |
| Slide Ranch | Muir Beach | 501(c)(3) | 1970 | $1 million | $2.1 million | 2024-12 |
| Heal the Ocean | Santa Barbara | 501(c)(3) | 2001 | $1 million | $1.9 million | 2025-12 |
| Ballona Wetlands Conservancy | Irvine | 501(c)(3) | 2004 | $1 million | $502,676 | 2025-12 |
| Blu Marine Foundation | Aliso Viejo | 501(c)(3) | 2023 | $1 million | $917,196 | 2024-12 |
| California Coastkeeper | Sacramento | 501(c)(3) | 2001 | $1 million | $843,073 | 2025-12 |
| Oneill Sea Odyssey | Santa Cruz | 501(c)(3) | 1998 | $1 million | $5.3 million | 2025-06 |
| Ethos Environmental Inc | Willits | 501(c)(3) | 2022 | $1 million | $261,312 | 2025-12 |
| Wild Wonder Foundation | Auburn | 501(c)(3) | 2022 | $998,971 | $926,577 | 2025-12 |
| North American Gas Heat Pump Collaborative | Half Moon Bay | 501(c)(3) | 2024 | $998,933 | $895,796 | 2024-12 |
| Ecologistics Inc | Los Osos | 501(c)(3) | 2010 | $986,383 | $594,531 | 2025-12 |
| Los Cerritos Wetlands Stewardship Inc | Long Beach | 501(c)(3) | 2001 | $969,484 | $624,178 | 2026-06 |
| Kern Water Collaborative | Bakersfield | 501(c)(3) | 2024 | $968,960 | $696,441 | 2025-12 |
| Together Bay Area | Berkeley | 501(c)(3) | 2014 | $963,757 | $519,700 | 2025-06 |
| North Figueroa Association | Los Angeles | 501(c)(3) | 2002 | $961,340 | $1.4 million | 2025-12 |
| Dogpatch & Northwest Potrero Hill Green Benefit District | San Francisco | 501(c)(3) | 2016 | $948,224 | $601,516 | 2025-06 |
| California River Watch | Sebastopol | 501(c)(3) | 1997 | $932,482 | $929,627 | 2025-12 |
| Grounded Foundation Inc | Santa Rosa | 501(c)(3) | 2022 | $929,760 | $525,601 | 2024-12 |
| Heather Farm Garden Center Association Incorporated | Walnut Creek | 501(c)(3) | 1972 | $928,683 | $1.7 million | 2025-12 |
| CCC Foundation | Sacramento | 501(c)(3) | 1994 | $927,329 | $2.4 million | 2025-06 |
| Water Conservation Garden Authority | El Cajon | 501(c)(3) | 1995 | $915,617 | $1.2 million | 2025-06 |
| Land Trust of Santa Clara Valley | Morgan Hill | 501(c)(3) | 1998 | $913,714 | $11.6 million | 2024-12 |
| Rescape California | San Francisco | 501(c)(3) | 2009 | $911,138 | $179,933 | 2025-06 |
| Farallon Institute | Petaluma | 501(c)(3) | 2008 | $911,027 | $202,041 | 2025-12 |
| Charge Across Town Inc | San Francisco | 501(c)(3) | 2015 | $909,106 | $58,842 | 2025-12 |
| Santa Clara Valley Bird Alliance | Cupertino | 501(c)(3) | 1977 | $908,729 | $2.7 million | 2026-05 |
| Lassen Land and Trails Trust | Susanville | 501(c)(3) | 1988 | $906,475 | $2.5 million | 2024-12 |
| Banning Ranch Conservancy | Newport Beach | 501(c)(3) | 2009 | $905,720 | $1.3 million | 2024-12 |
| Race To Zero Waste | S San Francisco | 501(c)(3) | 2019 | $900,242 | $157,384 | 2025-06 |
| Friends of the Inyo | Bishop | 501(c)(3) | 1997 | $890,026 | $404,999 | 2025-12 |
| Clean Tahoe Program | S Lake Tahoe | 501(c)(3) | 2010 | $882,362 | $1.5 million | 2025-09 |
| Tompkins Conservation | San Francisco | 501(c)(3) | 2000 | $876,691 | $8.2 million | 2025-12 |
| American River Parkway Foundation Incorporated | Carmichael | 501(c)(3) | 1984 | $867,715 | $1.8 million | 2025-12 |
| Common Vision | Berkeley | 501(c)(3) | 2013 | $863,417 | $376,746 | 2025-12 |
| Innovation Center for Energy and Sustainability | S Pasadena | 501(c)(3) | 2008 | $862,576 | $726,076 | 2024-12 |
| Build It Green | Oakland | 501(c)(3) | 2005 | $861,880 | $4.7 million | 2024-12 |
| Jimmy Miller Memorial Foundation | Manhattan Beach | 501(c)(3) | 2004 | $855,218 | $791,224 | 2025-12 |
| Butte-Yuba-Sutter Water Quality Coalition | Yuba City | 501(c)(3) | 2006 | $854,808 | $531,970 | 2024-12 |
| Nature Nexus Institute | Culver City | 501(c)(3) | 2022 | $845,053 | $188,087 | 2025-06 |
| Environmental Volunteers Inc | Palo Alto | 501(c)(3) | 1979 | $842,484 | $3.2 million | 2025-06 |
| Protect Our Communities Foundation | San Diego | 501(c)(3) | 2009 | $834,563 | $2 million | 2024-12 |
| Calaveras Big Trees Association | Arnold | 501(c)(3) | 1975 | $823,384 | $867,139 | 2024-06 |
| The Us-China Green Energy Council | San Jose | 501(c)(3) | 2009 | $819,540 | $765,615 | 2024-12 |
| Agriculture-Natural Resources Trust | Pleasant Hill | 501(c)(3) | 2000 | $815,356 | $9.7 million | 2025-12 |
| Californians Against Waste Foundation | Sacramento | 501(c)(3) | 1984 | $814,477 | $984,669 | 2024-12 |
| Third Millennium Alliance | Fremont | 501(c)(3) | 2010 | $809,537 | $753,700 | 2024-12 |
| San Francisco Clean City Coalition | San Francisco | 501(c)(3) | 1997 | $808,114 | $2.5 million | 2024-12 |
| Tahoe Mountain Resorts Environmental Fund | Truckee | 501(c)(3) | 2005 | $807,911 | $3.9 million | 2024-12 |
| Salinas Basin Water Alliance | Salinas | 501(c)(5) | 2024 | $805,745 | $415,675 | 2024-12 |
| Public Recreation Unlimited Inc | Salinas | 501(c)(3) | 1970 | $805,534 | $369,060 | 2025-06 |
| Torchbearr | Somes Bar | 501(c)(3) | 2022 | $793,828 | $259,822 | 2025-12 |
| Trinidad Coastal Land Trust | Trinidad | 501(c)(3) | 1979 | $786,508 | $3.3 million | 2024-12 |
| California Bountiful Foundation | Sacramento | 501(c)(3) | 1999 | $778,183 | $1.4 million | 2024-12 |
| Grades of Green Inc | El Segundo | 501(c)(3) | 2010 | $777,597 | $177,948 | 2025-06 |
| Central California Joint Cable- Fisheries Liaison Committee | Morro Bay | 501(c)(6) | 2001 | $777,247 | $1.6 million | 2025-12 |
| Home Planet Fund | Ventura | 501(c)(3) | 2022 | $773,090 | $12 million | 2025-07 |
| Southern California Water Coalition Inc | Corona | 501(c)(3) | 1985 | $771,254 | $962,165 | 2025-06 |
| California Releaf | Sacramento | 501(c)(3) | 2004 | $764,343 | $708,622 | 2025-06 |
| Earth Discovery Institute | El Cajon | 501(c)(3) | 2009 | $763,334 | $207,017 | 2025-06 |
| Friends of Robinson Gardens Inc | Beverly Hills | 501(c)(3) | 1983 | $759,856 | $1.6 million | 2025-06 |
| California Sustainability Group Inc | San Clemente | 501(c)(3) | 2023 | $757,657 | $184,513 | 2024-12 |
| Fatjo Corporation | Los Banos | 501(c)(3) | 1996 | $754,217 | $2.9 million | 2025-06 |
| Accounting for Sustainability Foundation Us Inc | El Segundo | 501(c)(3) | 2024 | $748,400 | $93,926 | 2025-03 |
| Sierra Watch | Nevada City | 501(c)(3) | 2002 | $746,588 | $918,258 | 2025-06 |
| Buckelew Community Housing Development Organization Inc | San Rafael | 501(c)(3) | 1999 | $746,060 | $5.7 million | 2025-06 |
| Ventana Wilderness Alliance A Non Profit California Corporation | Monterey | 501(c)(3) | 2000 | $743,171 | $128,580 | 2024-12 |
| Santa Cruz Hub for Sustainable Living | Santa Cruz | 501(c)(3) | 2001 | $742,317 | $564,394 | 2025-12 |
| Cactus & Succulent Society of America Inc | Pasadena | 501(c)(3) | 1983 | $739,689 | $1.4 million | 2025-12 |
| Environmental Protection Information Center Inc | Arcata | 501(c)(3) | 1990 | $737,556 | $771,109 | 2025-12 |
| Reap Climate Center Inc | Alameda | 501(c)(3) | 2021 | $736,504 | $147,817 | 2025-12 |
| Headwaters Basin Project | Nevada City | 501(c)(3) | 2019 | $726,785 | $675,610 | 2024-12 |
| Environment California Research & Policy Center Inc | Los Angeles | 501(c)(3) | 2003 | $713,419 | $1.5 million | 2025-08 |
| Jacoby Creek Land Trust | Bayside | 501(c)(3) | 1992 | $711,397 | $3.6 million | 2025-12 |
| Mothers of the Amazon Inc | Topanga | 501(c)(3) | 2023 | $711,205 | $141,641 | 2024-12 |
| Bolsa Chica Conservancy | Huntingtn BCH | 501(c)(3) | 1995 | $704,203 | $1.8 million | 2025-12 |
| Frontline Catalysts | Oakland | 501(c)(3) | 2021 | $703,506 | $644,149 | 2026-03 |
| Kula Project Inc | Costa Mesa | 501(c)(3) | 2013 | $702,683 | $439,558 | 2025-12 |
| Fresno Stewardship Foundation | Fresno | 501(c)(3) | 2022 | $695,684 | $88,076 | 2025-12 |
| Walter Munk Foundation for the Oceans | La Jolla | 501(c)(3) | 2019 | $693,038 | $129,908 | 2024-12 |
| Jug Handle Creek Farm and Nature Center | Berkeley | 501(c)(3) | 2002 | $690,979 | $3.2 million | 2025-06 |
| Southern Sierra Research Station | Weldon | 501(c)(3) | 2000 | $687,819 | $254,892 | 2025-12 |
| Marin Conservation League | San Rafael | 501(c)(3) | 1953 | $686,180 | $4.1 million | 2025-12 |
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.