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USGS - science for a changing world

California Water Research Projects






map of California counties Del Norte Siskiyou Modoc Humboldt Trinity Shasta Lassen Tehama Mendocino Lake Glenn Colusa Butte Plumas Stanislaus Tuolomne Mono San Benito Monterey Merced Mariposa Madera Fresno Kings Tulare Inyo San Luis Obispo Santa Barbara Kern Ventura Los Angeles Orange San Bernardino Riverside San Diego Imperial Sonoma Marin San Francisco San Mateo Santa Cruz Santa Clara Napa Solano Yolo Sacramento Contra Costa Alameda San Joaquin Calaveras Sutter Amador Alpine El Dorado Placer Yuba Nevada Sierra

USGS Data & Conditions

Real-Time California Streamflow Conditions

* DOI and USGS link and privacy policies apply.