Environment nonprofits in California

Environment nonprofits in California. Browse 4,392 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.

Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.

Nonprofit profiles

  1. I Love Rancho Cordova

    EIN 882630363 · Headquarters: RNCHO CORDOVA, CA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  2. Ian Somerhalder Foundation

    EIN 273968460 · Headquarters: Los Angeles, CA, USA · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  3. Iaqvec USA

    EIN 992437952 · Headquarters: Torrance, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Iconic Conservation Fund

    EIN 463851747 · Headquarters: La Jolla, CA, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  5. Icrest Foundation Inc

    EIN 920512933 · Headquarters: Sausalito, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  6. Idyllwild Forest Health Project

    EIN 822208987 · Headquarters: IDYLLWILD, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  7. IEA Research & Education Foundation

    EIN 811925084 · Headquarters: Coronado, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  8. If Not Us Then Who

    EIN 814186787 · Headquarters: TARZANA, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Igdc Solutionsorg

    EIN 453773308 · Headquarters: San Dimas, CA, USA · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  10. Igo Ono Area Neighborhood Watch Homeland Security Group

    EIN 680634803 · Headquarters: Igo, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Igreen Planet

    EIN 933472263 · Headquarters: Castro Valley, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  12. Illuminocean

    EIN 813139442 · Headquarters: La Canada Flintridge, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Imagine Earth Spirit

    EIN 954419132 · Headquarters: CALABASAS, CA, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  14. Imagine H2O Inc

    EIN 261453882 · Headquarters: San Francisco, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Imagine5 Foundation

    EIN 331325085 · Headquarters: SAN FRANCISCO, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  16. Impact Driven Academy

    EIN 991033045 · Headquarters: Discovery Bay, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Impact Madagascar Us

    EIN 821696367 · Headquarters: Seal Beach, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. ImpactZ Inc

    EIN 883363930 · Headquarters: Hayward, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Imperial Valley Trails and Land Conservancy

    EIN 863116076 · Headquarters: Paso Robles, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Impossible Foundation

    EIN 365038838 · Headquarters: REDWOOD CITY, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  21. In Good Company

    EIN 920672083 · Headquarters: SAN DIEGO, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  22. Inaturalist

    EIN 921296468 · Headquarters: SAN RAFAEL, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Inbaya

    EIN 884155377 · Headquarters: SANTA CLARA, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. Independent Power Providers

    EIN 770389659 · Headquarters: NORTH FORK, CA, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  25. Indigenous Stewardship Network

    EIN 882408503 · Headquarters: FOREST RANCH, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. Infill Builders Foundation

    EIN 272280183 · Headquarters: Sacramento, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  27. Infinite Power Corporation

    EIN 813594649 · Headquarters: San Diego, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Inika Small Earth Inc

    EIN 273109023 · Headquarters: San Diego, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  29. Inland Empire Interpretive Association

    EIN 260808110 · Headquarters: Moreno Valley, CA, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  30. Inland Empire Kids Outdoors

    EIN 844413721 · Headquarters: Riverside, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  31. Inland Mendocino County Land Trust Incorporated

    EIN 911939339 · Headquarters: Ukiah, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Inland Solar Challenge

    EIN 853042635 · Headquarters: Rialto, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Inland Urban Forest Council

    EIN 465525996 · Headquarters: Riverside, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Inner City Education Family

    EIN 461831800 · Headquarters: LOS ANGELES, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Innovation 44 Foundation

    EIN 852560860 · Headquarters: SAN FRANCISCO, CA, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990

  36. Innovation Center for Energy and Sustainability

    EIN 262619591 · Headquarters: LOS ANGELES, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Innovation Reef & Wildlife Conservancy

    EIN 853007747 · Headquarters: SAN CARLOS, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  38. Innovation Source Research Institut E

    EIN 412777713 · Headquarters: Los Angeles, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Innovative Butterflies Mercado Solutions

    EIN 272916436 · Headquarters: Whittier, CA, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  40. Inoceans - a Beringia Group

    EIN 814144892 · Headquarters: Cayucos, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Insight Environment

    EIN 471469609 · Headquarters: Palm Springs, CA, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  42. Institute for Conservation Advocac Research and Education

    EIN 943366465 · Headquarters: NAPA, CA, USA · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  43. Institute for Ecological Health

    EIN 680328081 · Headquarters: EL SOBRANTE, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Institute for Environmental Management

    EIN 770357175 · Headquarters: palo alto, CA, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  45. Institute for Global Solutions

    EIN 330908631 · Headquarters: Long Beach, CA, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  46. Institute for Study of Graphical Heritage

    EIN 260148381 · Headquarters: Yucca Valley, CA, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  47. Institute for the Development of Environmental Awareness Inc

    EIN 770460227 · Headquarters: ATASCADERO, CA, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  48. Institute of Environmental Quality

    EIN 943037160 · Headquarters: San Francisco, CA, US · Environment · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  49. Institute of Modern Wisdom Inc

    EIN 451650262 · Headquarters: Ojai, CA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  50. Integrity in Natural Resources

    EIN 680280393 · Headquarters: Sebastopol, CA, US · Environment · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  51. Intemerate Earth

    EIN 871401735 · Headquarters: SAN GABRIEL, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. International Carnivorous Plant Society

    EIN 912132312 · Headquarters: WALNUT CREEK, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  53. International Center for Technology Assessment

    EIN 471955648 · Headquarters: San Francisco, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. International Conservation Foundation

    EIN 863722933 · Headquarters: Riverside, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. International Consulting Business

    EIN 861237302 · Headquarters: Lemon Grove, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. International Court of the Environment Coalition

    EIN 272065069 · Headquarters: SAN RAFAEL, CA, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  57. International Green Industry Hall of Fame

    EIN 263378277 · Headquarters: Los Angeles, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. International Institute of Bengal Basin

    EIN 200237963 · Headquarters: Berkeley, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  59. International Landscape Lighting Institute Inc

    EIN 273510378 · Headquarters: SHERMAN OAKS, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  60. International Ozone Association

    EIN 341274149 · Headquarters: SACRAMENTO, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. International Rainforest Society

    EIN 770547714 · Headquarters: VENTURA, CA, US · Environment · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  62. International Ranger Federation

    EIN 931900925 · Headquarters: AUBURN, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  63. International Rivers Network

    EIN 943158295 · Headquarters: Oakland, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  64. International Sandalwood Foundation

    EIN 900645517 · Headquarters: Petaluma, CA, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  65. International Student Environmental Coalition

    EIN 822789272 · Headquarters: Los Angeles, CA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  66. International Sustainable Systems Research Center

    EIN 571164239 · Headquarters: Diamond Bar, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. International Thermoelectric Society

    EIN 270956157 · Headquarters: Los Angeles, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. International Water Initiative for Sanitation and Hygiene Inc

    EIN 810960493 · Headquarters: ONTARIO, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. International Watershed Partners

    EIN 473938622 · Headquarters: Santa Cruz, CA, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  70. International Wineries for Climate Action Inc

    EIN 863959971 · Headquarters: Santa Rosa, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. Interpretation Association of the West

    EIN 680472182 · Headquarters: Chico, CA, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  72. Intersectional Environmentalist

    EIN 861232246 · Headquarters: LOS ANGELES, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. Intl Society for the Preservation of the Tropical Rainforest

    EIN 954028364 · Headquarters: TWENTYNINE PALMS, CA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  74. Invasive Species Foundation

    EIN 872785616 · Headquarters: Davis, CA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  75. Inventure Institute Inc

    EIN 933712413 · Headquarters: MILL VALLEY, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  76. Inverness Garden Club of West Marin

    EIN 831675473 · Headquarters: Inverness, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Iplant Foundation

    EIN 852793613 · Headquarters: BREA, CA, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  78. Iron Mountain Conservancy

    EIN 330583674 · Headquarters: RAMONA, CA, USA · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  79. Irvine Ranch Conservancy

    EIN 061703160 · Headquarters: IRVINE, CA, USA · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-PF

  80. Irvine Ranch Conservancy

    EIN 455412769 · Headquarters: IRVINE, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Ishi Wilderness Coalition

    EIN 274930945 · Headquarters: GREENVILLE, CA, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  82. Isla Urbana Inc

    EIN 844205935 · Headquarters: San Diego, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  83. Island Conservation

    EIN 911839907 · Headquarters: SANTA CRUZ, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Island Mountain Institute

    EIN 942517747 · Headquarters: garberville, CA, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  85. Island Outpost Inc

    EIN 954427816 · Headquarters: SANTA MONICA, CA, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  86. Islands and Seas

    EIN 472871781 · Headquarters: Oakland, CA, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  87. Israel Strategic Alternative Energy Foundation

    EIN 800263559 · Headquarters: SAN FRANCISCO, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Itisoverdue

    EIN 862819165 · Headquarters: WINNETKA, CA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  89. Its About Sea Life

    EIN 800817837 · Headquarters: Tiburon, CA, US · Environment · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  90. Its Our Home

    EIN 262872625 · Headquarters: Santa Cruz, CA, US · Environment · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  91. Izaak Walton League of America Inc

    EIN 330726509 · Headquarters: Santa Ana, CA, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  92. Izaak Walton League of America Inc

    EIN 521382442 · Headquarters: San Pedro, CA, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  93. Jack L Davies Napa Valley Agricultural Land Preservation Fund

    EIN 942843178 · Headquarters: CALISTOGA, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Jack London Yacht Club

    EIN 832074978 · Headquarters: Kenwood, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Jacobs Maasai Well Inc

    EIN 822018108 · Headquarters: SALINAS, CA, USA · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-PF

  96. Jacoby Creek Land Trust

    EIN 943159789 · Headquarters: BAYSIDE, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Jacquemain and Gledhill Creekspirit Foundation

    EIN 680523262 · Headquarters: Santa Barbara, CA, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  98. Jangala Conservation

    EIN 474776554 · Headquarters: San Francisco, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Japanese Friendship Garden and Museum of San Diego Inc

    EIN 953572493 · Headquarters: SAN DIEGO, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Jardin Del Rey

    EIN 010922736 · Headquarters: Pomona, CA, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N

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