Bay Area Region

ID County Name Type
1 Alameda Coexistent
7 Contra Costa Coexistent
21 Marin Coexistent
27 Monterey Coexistent
28 Napa Coexistent
35 San Benito Dedicated
38 San Francisco Coexistent
41 San Mateo Coexistent
43 Santa Clara Coexistent
44 Santa Cruz Coexistent
48 Solano Coexistent
49 Sonoma Coexistent

Southern Region

ID County Name Type
13 Imperial Dedicated
19 Los Angeles Coexistent
30 Orange Coexistent
33 Riverside Coexistent
36 San Bernardino Coexistent
37 San Diego Coexistent
42 Santa Barbara Coexistent
56 Ventura Coexistent

Northern Region

ID County Name Type
4 Butte Dedicated
6 Colusa Dedicated
8 Del Norte Dedicated
11 Glenn Dedicated
12 Humboldt Coexistent
71 Karuk Tribe
17 Lake Dedicated
18 Lassen Dedicated
23 Mendocino Coexistent
25 Modoc Dedicated
32 Plumas Dedicated
45 Shasta Dedicated
47 Siskiyou Dedicated
52 Tehama Coexistent
53 Trinity Dedicated
72 Yurok Tribe

Mountain Valley Region

ID County Name Type
2 Alpine Dedicated
3 Amador Dedicated
5 Calaveras Coexistent
9 El Dorado Coexistent
14 Inyo Coexistent
26 Mono Coexistent
29 Nevada Coexistent
31 Placer Coexistent
34 Sacramento Coexistent
46 Sierra Dedicated
51 Sutter Dedicated
55 Tuolumne Coexistent
57 Yolo Dedicated
58 Yuba Coexistent

Central Valley Region

ID County Name Type
10 Fresno Coexistent
15 Kern Coexistent
16 Kings Coexistent
20 Madera Coexistent
22 Mariposa Dedicated
24 Merced Coexistent
39 San Joaquin Coexistent
40 San Luis Obispo Coexistent
50 Stanislaus Coexistent
54 Tulare Dedicated