CASE Region 1
Alpine, Amador, Butte, Calaveras, Colusa, Del Norte, El Dorado, Glenn, Humboldt, Lake, Lassen, Mendocino, Modoc, Nevada, Placer, Plumas, Sacramento, San Joaquin, Shasta, Sierra, Siskiyou, Sonoma, Stanislaus, Sutter, Tehama, Trinity, Tuolumne, Yolo, and Yuba Counties
Region 1 Director (2023-2025)
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CASE Region 2
Alameda, Contra Costa, Marin, Monterey, Napa, San Benito, San Francisco, San Mateo, Santa Clara, Santa Cruz, and Solano Counties
CASE Region 3
Fresno, Kern, Kings, Los Angeles, Madera, Mariposa, Merced, San Luis Obispo, Santa Barbara, Tulare, and Ventura Counties
CASE Region 4
Imperial, Inyo, Mono, Orange, Riverside, San Bernardino, and San Diego Counties