Data / Nonprofits / Maine / Portland / Environment
Environment nonprofits in Portland, ME: 29 registered with the IRS
29 environment nonprofits are registered with the IRS in Portland, ME, 27 of them 501(c)(3) charities; the 15 that report revenue took in $23.8 million. The largest by revenue: Biodiversity ($9.8 million), Reverb Inc ($5.7 million), Friends of Casco Bay ($1.6 million).
SpecStream is the live web data engine for teams and agents. It reads the IRS register of exempt organizations as the IRS updates it, and this page is that reading. Ask for the nonprofits you need by place, cause and size, with their latest Form 990 figures and websites, and they arrive in your sheet, CRM, Slack or agent.
Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Biodiversity | 501(c)(3) | 1999 | $9.8 million | $7.7 million | 2025-04 |
| Reverb Inc | 501(c)(3) | 2006 | $5.7 million | $6.7 million | 2025-12 |
| Friends of Casco Bay | 501(c)(3) | 1991 | $1.6 million | $3.2 million | 2026-03 |
| Maine Island Trail Association | 501(c)(3) | 1993 | $1.3 million | $3.1 million | 2025-09 |
| Association of State Wetland Managers Inc | 501(c)(3) | 1988 | $1.2 million | $610,823 | 2024-12 |
| Southern Maine Conservation Collaborative | 501(c)(3) | 2014 | $948,699 | $142,828 | 2025-12 |
| Portland Trails | 501(c)(3) | 1992 | $853,332 | $1.9 million | 2024-12 |
| Defend Our Health | 501(c)(3) | 2010 | $819,835 | $919,145 | 2024-12 |
| Collaborative for Bioregional Action Learning and Transformation | 501(c)(3) | 2023 | $415,790 | $314,000 | 2025-12 |
| Squirrel Island Preservation Foundation | 501(c)(3) | 1988 | $357,753 | $10.9 million | 2025-12 |
| Maine Association of Conservation Districts | 501(c)(3) | 1993 | $192,385 | $104,632 | 2025-12 |
| Maine Mountain Collaborative | 501(c)(3) | 2017 | $166,384 | $184,162 | 2024-12 |
| Maine Appalachian Trail Land Trust | 501(c)(3) | 2002 | $151,147 | $1.8 million | 2025-03 |
| Skutik River Restoration Trust | 501(c)(3) | 2025 | $149,102 | $359,471 | 2025-12 |
| Exemplary Forestry Management Inc | 501(c)(3) | 2023 | $71,800 | $74,631 | 2024-12 |
| After Party Inc | 501(c)(3) | 2026 | $0 | $0 | 2024-12 |
| Community Conservation Initiative | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Deering Center Neighborhood Association | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Defend Our Health Action | 501(c)(4) | 2014 | $0 | $0 | 2025-12 |
| Eco Maine | 501(c)(3) | 2008 | |||
| Friends of Deering Oaks | 501(c)(3) | 1998 | $0 | $0 | 2025-12 |
| Friends of Downtown Portland Maine | 501(c)(3) | 2025 | |||
| Friends of Fort Sumner Park | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Friends of Western Promenade | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Mensk | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Ornamental Horticulture Council | 501(c)(5) | 2024 | |||
| Protect Maines Fishing Heritage Foundation | 501(c)(3) | 2020 | $38,549 | 2025-12 | |
| Repickle Project | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Triceratops Group | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
Other causes in Portland, ME
- Arts, culture and humanities 115
- Education 79
- Philanthropy, voluntarism and grantmaking foundations 73
- Human services 68
- Community improvement and capacity building 55
- Recreation and sports 42
- Housing and shelter 32
- Health care 29
- Religion-related 26
- Youth development 20
- International, foreign affairs and national security 19
- Animal-related 13
- Mental health and crisis intervention 12
- Civil rights, social action and advocacy 12
- Crime and legal-related 11
- Public and societal benefit 10
- Food, agriculture and nutrition 10
- Employment 9
- Science and technology 7
- Mutual and membership benefit 6
- Diseases, disorders and medical disciplines 3
Every nonprofit in Portland, ME · 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.