Data / Nonprofits / California / Mill Valley / Environment
Environment nonprofits in Mill Valley, CA: 15 registered with the IRS
15 environment nonprofits are registered with the IRS in Mill Valley, CA, 15 of them 501(c)(3) charities; the 9 that report revenue took in $11 million. The largest by revenue: Barrel Bag ($3.7 million), North American Sustainable Refrigeration Council ($3.2 million), Marin Audubon Society Incorporated ($2.2 million).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Barrel Bag | 501(c)(3) | 2018 | $3.7 million | $0 | 2024-12 |
| North American Sustainable Refrigeration Council | 501(c)(3) | 2015 | $3.2 million | $1.7 million | 2025-12 |
| Marin Audubon Society Incorporated | 501(c)(3) | 1963 | $2.2 million | $9.5 million | 2025-06 |
| Code Redd | 501(c)(3) | 2014 | $641,636 | $119,514 | 2023-12 |
| Friends of Vallarta Botanical Gardens Ac | 501(c)(3) | 2007 | $531,125 | $263,017 | 2025-12 |
| Wildfiresorg Inc | 501(c)(3) | 2024 | $339,551 | $123,567 | 2025-12 |
| Sea Dreamers | 501(c)(3) | 2025 | $311,803 | $307,375 | 2025-12 |
| Homestead Valley Land Trust | 501(c)(3) | 1977 | $92,407 | $46,707 | 2025-06 |
| Inventure Institute Inc | 501(c)(3) | 2023 | $11,897 | $7,324 | 2025-12 |
| California Alpine Club Foundation | 501(c)(3) | 2004 | $0 | $0 | 2023-03 |
| Mill Valley Streamkeepers | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Mycomarin | 501(c)(3) | 2020 | $0 | $0 | 2025-08 |
| Spirit of Max Foundation | 501(c)(3) | 2022 | $3.5 million | 2025-12 | |
| Turning Tides Foundation Inc | 501(c)(3) | 2026 | |||
| Watershed Alliance of Marin | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
Other causes in Mill Valley, CA
- Education 37
- Arts, culture and humanities 30
- Philanthropy, voluntarism and grantmaking foundations 26
- Recreation and sports 19
- Religion-related 15
- Human services 14
- Community improvement and capacity building 12
- Youth development 9
- International, foreign affairs and national security 5
- Mental health and crisis intervention 5
- Medical research 5
- Health care 4
- Housing and shelter 4
- Animal-related 3
- Public and societal benefit 3
Every nonprofit in Mill Valley, CA · 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.