| Antelope Valley |
| Beaumont Basin |
| Brite Basin |
| Canyon Basin |
| Central Basin |
| Chino Basin |
| Cucamonga Basin |
| Cummings Basin |
| Ganesha Basin |
| Goleta Basin |
| Hemet-San Jacinto Basin |
| Inyo County Basins |
| Live Oak Basin |
| Los Osos Basin |
| Lower Claremont Heights Basin |
| Lytle Creek Basin |
| Main San Gabriel Basin |
| Mojave Basin |
| Nipomo Mesa Management Area |
| Northern Cities Management Area |
| Pomona Basin |
| Puente Basin |
| Raymond Basin |
| San Bernardino Basin Area |
| Santa Margarita River Watershed |
| Santa Maria Valley Management Area |
| Santa Paula Basin |
| Scott River System |
| Seaside Basin |
| Tehachapi Basin |
| Upper Claremont Heights Basin |
| Upper Los Angeles River Area |
| Warren Valley Basin |
| West Coast Basin |