1 - Northern Region

Serving Del Norte, Humboldt, Lassen, Mendocino, Modoc, Shasta, Siskiyou, Tehama and Trinity counties
(530) 225-2300

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
(916) 358-2900

*Note: Those portions of Sacramento, San Joaquin and Yolo counties that are south of I-80 and west of I-5 are in Region 3; the balance of those counties are in Region 2 (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
(707) 944-5500

*Note: Those portions of Sacramento, San Joaquin and Yolo counties that are south of I-80 and west of I-5 are in Region 3; the balance of those counties are in Region 2 (see detailed map).

4 - Central Region

Serving Fresno, Kern, Kings, Madera, Mariposa, Merced, Monterey, San Benito, San Luis Obispo, Stanislaus, Tulare and Tuolumne counties
(559) 243-4005

5 - South Coast Region

Serving Los Angeles, Orange, San Diego, Santa Barbara and Ventura counties
(858) 467-4201

6 - Inland Deserts Region

Serving Imperial, Inyo, Mono, Riverside and San Bernardino counties
(909) 484-0167

7 - Marine Region

Serving the entire California coastline from border to border and three nautical miles out to sea
(831) 649-2870