Data / Nonprofits / Colorado / Denver / Environment
Environment nonprofits in Denver, CO: 116 registered with the IRS
116 environment nonprofits are registered with the IRS in Denver, CO, 113 of them 501(c)(3) charities; the 54 that report revenue took in $225.4 million. The largest by revenue: Denver Botanic Garden Inc ($52.1 million), Colorado Clean Energy Fund ($34.8 million), Water Research Foundation ($24.3 million).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Denver Botanic Garden Inc | 501(c)(3) | 1952 | $52.1 million | $25 million | 2025-12 |
| Colorado Clean Energy Fund | 501(c)(3) | 2019 | $34.8 million | $175.8 million | 2025-12 |
| Water Research Foundation | 501(c)(3) | 1967 | $24.3 million | $62.6 million | 2025-12 |
| Environment America Inc | 501(c)(4) | 2007 | $15.1 million | $76.5 million | 2025-06 |
| Western Conservation Foundation | 501(c)(3) | 2005 | $14.6 million | $8.1 million | 2024-12 |
| Colorado Youth Corps Association | 501(c)(3) | 2000 | $10.9 million | $3.8 million | 2025-12 |
| Colorado Water Trust Inc | 501(c)(3) | 2002 | $7.6 million | $8.3 million | 2024-12 |
| Denver Botanic Gardens Endowment Inc | 501(c)(3) | 1992 | $7.5 million | $54.2 million | 2024-12 |
| Environment America Research and Policy Center Inc | 501(c)(3) | 2008 | $6.4 million | $14.4 million | 2025-06 |
| Western Landowners Alliance | 501(c)(3) | 2014 | $4.6 million | $3.5 million | 2025-12 |
| Conservation Colorado Education Fund | 501(c)(3) | 1991 | $4.3 million | $6.9 million | 2025-09 |
| Denver Urban Gardens | 501(c)(3) | 1985 | $4.1 million | $1.6 million | 2025-12 |
| Iclei Local Governments for Sustainability USA Inc | 501(c)(3) | 1991 | $4.1 million | $2.2 million | 2024-12 |
| Revision International | 501(c)(3) | 2008 | $4 million | $5.9 million | 2024-12 |
| Coalitions and Collaboratives Inc | 501(c)(3) | 2015 | $3.7 million | $1.1 million | 2024-12 |
| Colorado Center for the Advancement of Patient Safety | 501(c)(3) | 1993 | $3.1 million | $5.9 million | 2024-12 |
| Bluff Lake Nature Center | 501(c)(3) | 1995 | $2.5 million | $12.7 million | 2024-12 |
| Sarara Institute | 501(c)(3) | 2018 | $2.4 million | $458,809 | 2024-12 |
| Environmental Action Inc | 501(c)(4) | 2004 | $2.4 million | $3.1 million | 2025-06 |
| The Alliance for Collective Action | 501(c)(3) | 2004 | $2 million | $11.1 million | 2024-12 |
| Always On Energy Research | 501(c)(3) | 2023 | $1.5 million | $679,407 | 2025-12 |
| Council of Western State Foresters | 501(c)(3) | 2003 | $1.4 million | $344,830 | 2024-12 |
| Worldmind Nature Immersion School | 501(c)(3) | 2015 | $1.1 million | $2.3 million | 2025-07 |
| Colorado Energy & Water Institute | 501(c)(3) | 2020 | $889,158 | $358,862 | 2025-12 |
| Colorado Foundation for Water Education | 501(c)(3) | 2003 | $878,447 | $665,338 | 2025-06 |
| Colorado Alliance for Environmental Education | 501(c)(3) | 1990 | $849,383 | $640,095 | 2025-12 |
| Green Corps Inc | 501(c)(3) | 1992 | $802,778 | $4.9 million | 2025-06 |
| Cottonwood Institute | 501(c)(3) | 2007 | $779,815 | $465,231 | 2025-09 |
| Womens Voices for the Earth | 501(c)(3) | 1996 | $723,660 | $1.1 million | 2025-12 |
| Rocky Mountain Wild Incorporated | 501(c)(3) | 2000 | $593,506 | $474,960 | 2025-12 |
| Creatio Inc | 501(c)(3) | 2010 | $566,586 | $99,020 | 2024-12 |
| Recreative Denver | 501(c)(3) | 2016 | $539,974 | $99,790 | 2025-12 |
| Rocky Mountain Water Environment Assoc | 501(c)(3) | 1979 | $539,782 | $367,291 | 2024-12 |
| Clear the Air Foundation | 501(c)(3) | 2010 | $513,946 | $1.4 million | 2024-12 |
| Triple Bottom Line Foundation | 501(c)(3) | 2002 | $449,514 | $5.2 million | 2025-12 |
| Environmental and Engineering Geophysical Society | 501(c)(3) | 1989 | $370,761 | $31,914 | 2025-12 |
| Climate Democracy Initiative | 501(c)(3) | 2022 | $295,056 | $27,961 | 2025-12 |
| Colorado Native Plant Society | 501(c)(3) | 1977 | $249,264 | $709,587 | 2025-12 |
| Climate Jobs Colorado Inc | 501(c)(3) | 2026 | $224,076 | $91,607 | 2025-12 |
| Cossa Institute Inc | 501(c)(3) | 2023 | $216,761 | $71,227 | 2024-12 |
| Arctic Arts Project | 501(c)(3) | 2020 | $214,861 | $308,980 | 2024-12 |
| Rocky Mountain Land Library | 501(c)(3) | 2006 | $186,973 | $458,767 | 2025-12 |
| Colorado Nature League | 501(c)(3) | 2024 | $180,546 | $45,675 | 2024-12 |
| Colorado Water Wise Council | 501(c)(3) | 1994 | $135,925 | $227,536 | 2025-12 |
| Basecamp Foundation USA | 501(c)(3) | 2010 | $130,413 | $88,803 | 2024-12 |
| Colorado Advanced Manufacturing Foundation | 501(c)(3) | 2014 | $119,607 | $10,900 | 2024-12 |
| Mother of Corals | 501(c)(3) | 2020 | $108,704 | $65,320 | 2025-12 |
| Environmental Action Research Center Inc | 501(c)(3) | 2017 | $79,399 | $61,276 | 2025-06 |
| Sloans Lake Park Foundation | 501(c)(3) | 2020 | $65,647 | $42,025 | 2025-12 |
| Global Ecovillage Network-United States | 501(c)(3) | 2000 | $52,358 | $47,010 | 2024-12 |
| Colorado Tree Coalition Inc | 501(c)(3) | 1995 | $51,636 | $252,637 | 2024-12 |
| Barr Lake and Milton Reservoir Watershed Association | 501(c)(3) | 2012 | $41,700 | $327,027 | 2025-07 |
| Colorado Federation of Garden Clubs Inc | 501(c)(3) | 1984 | $35,244 | $205,000 | 2025-05 |
| Denver Orchid Society | 501(c)(3) | 1985 | $15,250 | $66,637 | 2024-11 |
| A Part of Everything CDC | 501(c)(3) | 2025 | |||
| Accelerate Neighborhood Climate Action | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Bicycle Forward | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Black Jet Drone Academy | 501(c)(3) | 2026 | |||
| Canopy Denver | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Clean Trails Inc | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Coloradans for Natural Resources | 501(c)(4) | 2014 | $0 | $0 | 2025-06 |
| Colorado Grotto Inc | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| Colorado Lake and Reservoir Management Association | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| Colorado River Surfing Association Inc | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Confluence Colorado | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Cordis Certified Healthy | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Denver Master Gardeners Association | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Design Workshop Foundation | 501(c)(3) | 2003 | $86,025 | 2025-12 | |
| Doing My Part Global | 501(c)(3) | 2025 | |||
| Environment Illinois Research and Education Center NFP | 501(c)(3) | 2006 | $0 | $0 | 2025-06 |
| Environmental Alliance Inc | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Garden Club of Denver | 501(c)(3) | 1969 | $0 | $0 | 2026-06 |
| Glacier Rescue Project | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Great Outdoors Denver | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Greencio | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Grid Alternatives | 501(c)(3) | 2014 | |||
| Grow Local Colorado | 501(c)(3) | 2026 | |||
| H2o Media LTD | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Hawc | 501(c)(3) | 2026 | |||
| Henry and Baloo Foundation | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Lance Ramsay Raymond Foundation | 501(c)(3) | 2020 | $911,457 | 2025-12 | |
| Light Co2 | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Lives Not Landfills | 501(c)(3) | 2024 | |||
| Michael P Dowling Foundation | 501(c)(3) | 1997 | $703,565 | 2025-12 | |
| Mycelium Cooperative Foundation | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| One Yard at A Time | 501(c)(3) | 2025 | $0 | $0 | 2024-10 |
| Partners for Western Conservation | 501(c)(3) | 2010 | $0 | $234,989 | 2025-12 |
| Partnership of Rangeland Trusts | 501(c)(3) | 2007 | $0 | $0 | 2024-12 |
| Peoplese Bees | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Pesticide Watch Education Fund | 501(c)(3) | 1995 | $0 | $0 | 2025-06 |
| Petals for Pollinators | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Polar Planet Foundation | 501(c)(3) | 2024 | |||
| Raqc Clean Air Fund | 501(c)(3) | 1997 | $34,430 | 2025-12 | |
| Regional Response Inc 01-10-99 | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Rock the Earth | 501(c)(3) | 2004 | $0 | $0 | 2024-12 |
| Rocky Mountain Bonsai Society | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Rocky Mountain Weavers Guild | 501(c)(3) | 2002 | $0 | $0 | 2025-05 |
| Rowers for Healthy Watersheds | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Sloans Lake Citizens Group | 501(c)(3) | 2012 | $0 | $0 | 2024-12 |
| Smart Land Conservation Fund | 501(c)(3) | 2026 | |||
| Smogfree Denver | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Solar Connection Initiative | 501(c)(3) | 2024 | |||
| Spiral R-Evolution | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Stoic Cutthroats | 501(c)(3) | 2023 | $1,836 | 2025-12 | |
| Summerhome Garden | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Sustainable Development Strategies Group | 501(c)(3) | 2009 | $0 | $0 | 2024-12 |
| Sustainable Tourism On Vashon | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| The Confluences | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| The Friends of Colorado State Parks | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| The Roots Down Fund Inc | 501(c)(3) | 2026 | |||
| Trekfreely | 501(c)(3) | 2026 | |||
| United Mineral Network | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Upper Colorado River Alliance | 501(c)(3) | 2011 | $17,884 | 2024-12 | |
| Vivax Community Foundation | 501(c)(3) | 2023 | $16,566 | 2024-12 | |
| We the Peoples Fund | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Women in Sustainability | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
Other causes in Denver, CO
- Education 604
- Human services 464
- Philanthropy, voluntarism and grantmaking foundations 434
- Religion-related 422
- Arts, culture and humanities 408
- Community improvement and capacity building 323
- Recreation and sports 260
- Housing and shelter 185
- Health care 154
- Youth development 138
- Mental health and crisis intervention 136
- Public and societal benefit 116
- International, foreign affairs and national security 94
- Animal-related 85
- Civil rights, social action and advocacy 80
- Crime and legal-related 77
- Employment 63
- Food, agriculture and nutrition 56
- Diseases, disorders and medical disciplines 48
- Public safety, disaster preparedness and relief 31
- Mutual and membership benefit 25
- Science and technology 25
- Medical research 23
- Social science 7
Every nonprofit in Denver, CO · Environment nonprofits across the state · Nonprofits in every city of the state
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.