Data / Nonprofits / California / Walnut Creek / Environment
Environment nonprofits in Walnut Creek, CA: 18 registered with the IRS
18 environment nonprofits are registered with the IRS in Walnut Creek, CA, 18 of them 501(c)(3) charities; the 7 that report revenue took in $5.2 million. The largest by revenue: Ruth Bancroft Garden Inc ($2.3 million), California Urban Water Agencies ($1.2 million), Heather Farm Garden Center Association Incorporated ($928,683).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Ruth Bancroft Garden Inc | 501(c)(3) | 1994 | $2.3 million | $5.1 million | 2025-12 |
| California Urban Water Agencies | 501(c)(3) | 1993 | $1.2 million | $691,112 | 2025-06 |
| Heather Farm Garden Center Association Incorporated | 501(c)(3) | 1972 | $928,683 | $1.7 million | 2025-12 |
| Sustainable Contra Costa | 501(c)(3) | 2011 | $286,100 | $131,147 | 2025-12 |
| Carbon Offsets To Alleviate Poverty | 501(c)(3) | 2011 | $242,161 | $401,146 | 2024-12 |
| Wild Tree Foundation | 501(c)(3) | 2019 | $203,030 | $98,433 | 2024-12 |
| International Carnivorous Plant Society | 501(c)(3) | 2002 | $73,320 | $165,378 | 2024-12 |
| California Garden Club Inc | 501(c)(3) | 1969 | $0 | $0 | 2025-12 |
| Clear Water Vision | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Construction Millennials of America | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Friends of the Creeks | 501(c)(3) | 1995 | $0 | $0 | 2024-12 |
| Greatwilderness Com | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Monarch Bear Institute | 501(c)(3) | 2004 | $0 | $0 | 2025-06 |
| Mount Diablo Bird Alliance | 501(c)(3) | 1970 | $0 | $0 | 2026-06 |
| Suisun Valley Natureworks | 501(c)(3) | 2026 | |||
| Urthfund | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Walnut Creek Watershed Council | 501(c)(3) | 2022 | $0 | $0 | 2026-06 |
| World Rainforest Fund | 501(c)(3) | 2012 | $0 | $65,064 | 2025-12 |
Other causes in Walnut Creek, CA
- Education 73
- Human services 56
- Arts, culture and humanities 54
- Philanthropy, voluntarism and grantmaking foundations 44
- Recreation and sports 42
- Religion-related 32
- Housing and shelter 30
- Community improvement and capacity building 28
- Health care 20
- Animal-related 17
- International, foreign affairs and national security 14
- Mental health and crisis intervention 14
- Public and societal benefit 11
- Youth development 9
- Medical research 6
- Mutual and membership benefit 5
- Science and technology 5
- Crime and legal-related 5
- Civil rights, social action and advocacy 5
- Diseases, disorders and medical disciplines 5
- Employment 4
Every nonprofit in Walnut Creek, 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.