| Court Name | Final Decision | Watermaster | Location |
| Beaumont Basin | -- | -- | Riverside County |
| Brite Basin | -- | Tehachapi-Cummings County Water District | Kern County |
| Central Basin | 1965 | Dept. of Water Resources -- Southern District | Los Angeles County |
| Chino Basin | 1978 | Nine-member board | San Bernardino County |
| Cucamonga Basin | -- | None appointed; operated as part of Chino Basin | San Bernardino County |
| Cummings Basin | 1972 | Tehachapi-Cummings County Water District | Kern County |
| Goleta Basin | -- | Goleta Water District | Santa Barbara County |
| Main San Gabriel Basin | 1973 | Nine-member board nominated by water purveyors and water districts, appointed by Superior Court. | Los Angeles County |
| Mojave Basin Area | 1996 | Mojave Water Agency | San Bernardino County |
| Puente Basin | 1985 | -- | Los Angeles County |
| Puente Narrows | -- | Two consultants | Los Angeles County |
| Raymond Basin | 1944 | Raymond Basin Management Board | Los Angeles County |
| San Gregorio Creek Stream System | 1992 | One-person watermaster | San Mateo County |
| Santa Margarita River Watershed | 1966 | U.S. District Court appointee | San Diego and Riverside Counties |
| Santa Paula Basin | 1996 | Three-person Technical Advisory Committee from United Water CD, City of Ventura, and Santa Paula Basin Pumpers Association | Ventura County |
| Scott River Stream System | 1980 | Two local irrigation districts | Siskiyou County |
| Six Basins | 1999 | Nine-member board | Los Angeles and San Bernardino Counties |
| Tehachapi Basin | 1972 | Tehachapi-Cummings County Water District | Kern County |
| Upper Los Angeles River Area | 1979 | An individual hydrologist appointed by the Superior Court | Los Angeles County |
| Warren Valley Basin | 1977 | Hi-Desert Water District | San Bernardino County |
| West Coast Basin | 1961 | Dept. of Water Resources -- Southern District | Los Angeles County |
| Western San Bernardino | -- | -- | San Bernardino and Riverside Counties |