Region 1
Del Norte, Humboldt, Lake, Marin, Mendocino, Napa, Solano, Sonoma, Trinity and Yolo Counties
Region 2
Alpine, Amador, Butte, Calaveras, Colusa, El Dorado, Glenn, Lassen, Modoc, Nevada, Placer, Plumas, Sacramento, Shasta, Sierra, Siskiyou, Sutter, Tehama, and Yuba Counties
Region 3
Alameda, Contra Costa, Santa Clara, Santa Cruz and San Mateo Counties
Region 4
Fresno, Kern, Kings, Madera, Mariposa, Merced, San Joaquin, Stanislaus, Tulare, and Tuloumne Counties
Region 5
Monterey, San Benito, Santa Barbara, San Luis Obispo and Ventura Counties
Region 6
Los Angeles County
Region 7
Inyo, Mono, Riverside and San Bernardino Counties
Region 8
Orange County
Region 9
Imperial and San Diego County
