Region
California
Riverside County
4
San Joaquin Valley
3
Arizona
2
Central Valley (Valley)
2
Nevada
2
Owens Valley
2
San Bernardino County
2
Antelope Valley Region
1
Colorado River Valley (Colo.-Mexico)
1
Imperial County
1
Imperial Valley (Calif. and Mexico)
1
Inyo County
1
Kern County
1
Klamath Basin
1
Mexico
1
Monterey County
1
Needles Region
1
Oregon
1
Pajaro River Valley
1
San Luis Obispo County
1
Santa Barbara County
1
Tulare County
1
Tule Lake (Siskiyou County and Modoc County)
1
Yuma County
1