Environment nonprofits

Environment nonprofits. Browse 35,718 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. Massaponax Alliance

    EIN 392719207 · Headquarters: Alexandria, VA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. MassEnergize Inc

    EIN 833545333 · Headquarters: Concord, MA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Mastate Charitable Foundation

    EIN 201633894 · Headquarters: Seattle, WA, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  4. Master Contracting Stevedore Association of the Pacific Coast I

    EIN 941531994 · Headquarters: SEATTLE, WA, US · Environment · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  5. Master Crafts Alliance Inc

    EIN 841885465 · Headquarters: St Thomas, VI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Master Gardener Association

    EIN 134319416 · Headquarters: COVALLIS, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Master Gardener Association

    EIN 141962153 · Headquarters: COVALLIS, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Master Gardener Association

    EIN 300064386 · Headquarters: COVALLIS, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Master Gardener Association

    EIN 300064391 · Headquarters: COVALLIS, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Master Gardener Association

    EIN 300064399 · Headquarters: C, OR, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Master Gardener Association

    EIN 300064402 · Headquarters: ROSEBURG, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Master Gardener Association

    EIN 300064559 · Headquarters: COVALLIS, OR, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  13. Master Gardener Association

    EIN 300064565 · Headquarters: COVALLIS, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Master Gardener Association

    EIN 300064567 · Headquarters: COVALLIS, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Master Gardener Association

    EIN 300064570 · Headquarters: CORVALLIS, OR, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  16. Master Gardener Association

    EIN 300064573 · Headquarters: COVALLIS, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Master Gardener Association

    EIN 300064574 · Headquarters: ROSEBURG, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Master Gardener Association

    EIN 300064575 · Headquarters: CORVALLIS, OR, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  19. Master Gardener Association

    EIN 470954116 · Headquarters: Lakeview, OR, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  20. Master Gardener Association of Fresno County

    EIN 770433938 · Headquarters: Fresno, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  21. Master Gardener Association of Pass Aic County Inc

    EIN 223494971 · Headquarters: Wayne, NJ, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Master Gardener Association of the Piedmont

    EIN 020567048 · Headquarters: Spartanburg, SC, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Master Gardener Foundation of Benton-franklin County

    EIN 020777791 · Headquarters: KENNEWICK, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  24. Master Gardener Foundation of Chelan -Douglas Counties

    EIN 911960335 · Headquarters: Wenatchee, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  25. Master Gardener Foundation of Clallam County

    EIN 911381140 · Headquarters: Sequim, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  26. Master Gardener Foundation of Cowlitz County

    EIN 911930414 · Headquarters: Kelso, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Master Gardener Foundation of Grant-adams Counties

    EIN 753211697 · Headquarters: EPHRATA, WA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Master Gardener Foundation of King County

    EIN 911276424 · Headquarters: RENTON, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  29. Master Gardener Foundation of Kitsap County

    EIN 943049072 · Headquarters: SILVERDALE, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  30. Master Gardener Foundation of San Juan County

    EIN 464263338 · Headquarters: FRIDAY HARBOR, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Master Gardener Foundation of Spokane County

    EIN 460925099 · Headquarters: SPOKANE, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. Master Gardener Foundation of Thurston County

    EIN 911898726 · Headquarters: OLYMPIA, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  33. Master Gardener Foundation of Tulsa

    EIN 731413573 · Headquarters: Tulsa, OK, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Master Gardener Foundation of Washington State

    EIN 911148165 · Headquarters: YAKIMA, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  35. Master Gardener Foundation of Whatcom County

    EIN 911833139 · Headquarters: Bellingham, WA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  36. Master Gardener Foundation of Yakima County

    EIN 550825932 · Headquarters: Yakima, WA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  37. Master Gardener Group of Gaston County Inc

    EIN 993990629 · Headquarters: Dallas, NC, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Master Gardener Society of Oakland County Inc

    EIN 460962609 · Headquarters: ROCHESTER HILLS, MI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  39. Master Gardener Volunteer Assoc of Orange County North Carolina

    EIN 991772233 · Headquarters: Hillsborough, NC, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Master Gardener Volunteers of Cobb County Inc

    EIN 300306736 · Headquarters: Marietta, GA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  41. Master Gardeners Association

    EIN 300986391 · Headquarters: McMinnville, OR, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Master Gardeners Association of Rogers County Inc

    EIN 371499875 · Headquarters: CLAREMORE, OK, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Master Gardeners Foundation Od Mason County

    EIN 475551510 · Headquarters: SHELTON, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Master Gardeners of Clark County

    EIN 311710686 · Headquarters: SPRINGFIELD, OH, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  45. Master Gardeners of Cuyahoga County Inc

    EIN 383711785 · Headquarters: Cleveland, OH, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Master Gardeners of Essex County Inc

    EIN 223704803 · Headquarters: ROSELAND, NJ, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Master Gardeners of Greater New Orleans Incorporated

    EIN 273431714 · Headquarters: Metairie, LA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Master Gardeners of Greene County

    EIN 311800473 · Headquarters: Xenia, OH, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  49. Master Gardeners of Lewis County

    EIN 912007564 · Headquarters: Chehalis, WA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Master Gardeners of Mercer County a Nj Nonprofit Corporation

    EIN 392855061 · Headquarters: Pennington, NJ, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Master Gardeners of Montgomery County

    EIN 922854346 · Headquarters: Crawfordsville, IN, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Master Gardeners of Prince William Inc

    EIN 260008004 · Headquarters: MANASSAS, VA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Master Gardeners of Rutherford County Tennessee

    EIN 461358315 · Headquarters: Murfreesboro, TN, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Master Gardeners of the North

    EIN 391999268 · Headquarters: Rhinelander, WI, US · Environment · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  55. Master Gardeners of York County

    EIN 571085054 · Headquarters: EDGEMOOR, SC, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Master Naturalists of the Virginia Peninsula

    EIN 461510767 · Headquarters: Hampton, VA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Masternet Foundation

    EIN 870577004 · Headquarters: BAKER, NV, USA · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990

  58. Mastic Beach Conservancy Corp

    EIN 871707321 · Headquarters: MASTIC BEACH, NY, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  59. Mastiffs R Us

    EIN 460821944 · Headquarters: BELLEVUE, MI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. Mastodon Buck Lake Association

    EIN 371566494 · Headquarters: Crystal Falls, MI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Mat-su Master Gardner Association Inc

    EIN 711015499 · Headquarters: Palmer, AK, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Matagorda Area Response for Sustainable Habitat

    EIN 831979009 · Headquarters: Palacios, TX, US · Environment · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  63. Matagorda County Birding Nature Ctr

    EIN 760546145 · Headquarters: BAY CITY, TX, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  64. Matagorda Current Meter Project

    EIN 455001419 · Headquarters: PORT LAVACA, TX, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Matanuska Outdoor Institute Inc

    EIN 873611929 · Headquarters: anchorage, AK, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Mateel Environmental Justice Foundation

    EIN 680373354 · Headquarters: Arcata, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Material Innovation Institute

    EIN 843847333 · Headquarters: NAPA, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Materials for Families Inc

    EIN 992565055 · Headquarters: New York, NY, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Mathews Land Conservancy

    EIN 541705572 · Headquarters: MATHEWS, VA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  70. Mathwig Family Charitable Trust Xxx-xx-xxxx

    EIN 392142569 · Headquarters: ST LOUIS PARK, MN, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  71. Matson Mowder Howe Community Garden

    EIN 392081259 · Headquarters: REDDING, CA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Matsu Valley Planning for Transportation

    EIN 331271929 · Headquarters: Palmer, AK, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  73. Matsya Foundation

    EIN 393297316 · Headquarters: Sicklerville, NJ, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Mattabesset River Watershed Association

    EIN 061483655 · Headquarters: Kensington, CT, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  75. Mattapoisett Land Trust

    EIN 237367489 · Headquarters: Mattapoisett, MA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Mattaponi & Pamunkey Rivers Association Inc

    EIN 541618496 · Headquarters: Walkerton, VA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Mattawoman Watershed Society

    EIN 261836641 · Headquarters: Accokeek, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Matthew 2540 Mission Inc

    EIN 113643437 · Headquarters: STILLWATER, OK, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  79. Matthews Lake Association Inc

    EIN 371567043 · Headquarters: Spooner, WI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Mattole Outdoorsmen and Conservationists

    EIN 862550392 · Headquarters: Petrolia, CA, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  81. Mattole Restoration Council

    EIN 680037149 · Headquarters: PETROLIA, CA, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. Mattole Watershed Taxpayers Association

    EIN 942597449 · Headquarters: Redway, CA, US · Environment · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  83. Mattress Recycling Council

    EIN 464208045 · Headquarters: Alexandria, VA, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Maui Airport Ohana Inc

    EIN 994200983 · Headquarters: BEAVERTON, OR, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  85. Maui Aloha Aina Association

    EIN 200820292 · Headquarters: Wailuku, HI, US · Environment · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  86. Maui Association of Landscape Professionals

    EIN 990320177 · Headquarters: Wailuku, HI, US · Environment · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  87. Maui Growers and Floriculture Collective

    EIN 993051524 · Headquarters: Makawao, HI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Maui Nui Botanical Gardens Inc

    EIN 990320418 · Headquarters: KAHULUI, HI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. Maui Nui Community Managed Makai Area Learning Network

    EIN 464895131 · Headquarters: MAKAWAO, HI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  90. Maui Nui Marine Resource Council Inc

    EIN 472509441 · Headquarters: KIHEI, HI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Maui Ocean Center Marine Institute

    EIN 812540684 · Headquarters: WAILUKU, HI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Maui Orchid Society Inc

    EIN 990352475 · Headquarters: Kahului, HI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Maui Recycling Group Inc

    EIN 990288422 · Headquarters: Makawao, HI, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Mauldin Garden Club

    EIN 161757783 · Headquarters: MAULDIN, SC, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  95. Maumee River Basin Center for Ecological Restoration

    EIN 465348407 · Headquarters: Defiance, OH, US · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  96. Maumee Valley Resource Conservation & Development Area

    EIN 341778754 · Headquarters: Defiance, OH, US · Environment · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  97. Mauna Loa Observatory Employee Association

    EIN 392315014 · Headquarters: Hilo, HI, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Maunalua Fishpond Heritage Center

    EIN 261349087 · Headquarters: HONOLULU, HI, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Mavericks Wave Tribes United

    EIN 853150078 · Headquarters: Pacifica, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Mavis Institute Ltd

    EIN 822647384 · Headquarters: Flat Top, WV, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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