Region

Region

Counties

Northern

Siskiyou, Modoc, Trinity, Shasta, Lassen, Tehama, Plumas, Lake, Glenn, Butte, Sierra, Colusa, Sutter, and Yuba

North Coast

Del Norte, Humboldt, and Mendocino

Bay Area

San Francisco, Marin, Sonoma, Napa, Contra Costa, Alameda, San Mateo, Santa Clara, and Santa Cruz

Sacramento Area

Yolo, Sacramento, Solano, San Joaquin, Alpine, Nevada, Placer, and El Dorado

Inland

Calaveras, Tuolumne, Mono, Amador, Stanislaus, Merced, Mariposa, Madera, Fresno, Inyo, Kings, Tulare, and Kern

Coastal

Monterey, Ventura, Santa Barbara, San Luis Obispo and San Benito

Southern

Los Angeles, Orange, Riverside, San Diego, Imperial, and San Bernardino

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