Find Your Basin Basin Information Find Your Basin Discover models, publications, and information organized by basin or subbasin. Find your Basin below! Locate Basin on a Map View Map Enter basin name or number Basin Name Basin Number County AlamedaAmadorButteCalaverasColusaContra CostaDel NorteEl DoradoFresnoGlennHumboldtImperialInyoKernKingsLakeLassenLos AngelesMaderaMarinMendocinoMercedModocMonoMontereyNapaNevadaOrangePlacerPlumasRiversideSacramentoSan BenitoSan BernardinoSan DiegoSan FranciscoSan JoaquinSan Luis ObispoSan MateoSanta BarbaraSanta ClaraSanta CruzShastaSierraSiskiyouSolanoSonomaStanislausSutterTehamaTulareVenturaYoloYuba Critically Overdrafted YesNo Clear Search Results use DWR’s Mapping Tool Visit Site