CDFW Regions

1 - Northern Region

Serving Del Norte, Humboldt, Lassen, Mendocino, Modoc, Shasta, Siskiyou, Tehama and Trinity counties

2 - North Central Region

Serving Alpine, Amador, Butte, Calaveras, Colusa, El Dorado, Glenn, Lake, Nevada, Placer, Plumas, Sacramento*, San Joaquin*, Sierra, Sutter, Yolo* and Yuba counties

*Note: These counties are split between regions.
See detailed map.

3 - Bay Delta Region

Serving Alameda, Contra Costa, Marin, Napa, Sacramento*, San Mateo, Santa Clara, Santa Cruz, San Francisco, San Joaquin*, Solano, Sonoma, and Yolo* counties

*Note: These counties are split between regions.
See detailed map.