Data date: September 23, 2026
58 counties
Public Water System SAFER Profiles

California SAFER County Profiles

Select a county to open its three-page profile, or download the PDF. Statewide, 33% of listed systems are Failing or At-Risk.

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CountySystemsFailing / At-RiskShare high-concernOpen
Alameda1517%ViewPDF
Alpine700%ViewPDF
Amador20525%ViewPDF
Butte511529%ViewPDF
Calaveras21314%ViewPDF
Colusa9333%ViewPDF
Contra Costa421024%ViewPDF
Del Norte18844%ViewPDF
El Dorado24625%ViewPDF
Fresno1317154%ViewPDF
Glenn18317%ViewPDF
Humboldt501326%ViewPDF
Imperial341750%ViewPDF
Inyo47919%ViewPDF
Kern17810458%ViewPDF
Kings181056%ViewPDF
Lake431330%ViewPDF
Lassen20840%ViewPDF
Los Angeles2035527%ViewPDF
Madera854755%ViewPDF
Marin18211%ViewPDF
Mariposa16425%ViewPDF
Mendocino551120%ViewPDF
Merced392359%ViewPDF
Modoc6117%ViewPDF
Mono20735%ViewPDF
Monterey1686136%ViewPDF
Napa311135%ViewPDF
Nevada30620%ViewPDF
Orange4038%ViewPDF
Placer5624%ViewPDF
Plumas27311%ViewPDF
Riverside982829%ViewPDF
Sacramento732230%ViewPDF
San Benito36925%ViewPDF
San Bernardino1524832%ViewPDF
San Diego883540%ViewPDF
San Francisco500%ViewPDF
San Joaquin1154640%ViewPDF
San Luis Obispo802228%ViewPDF
San Mateo36925%ViewPDF
Santa Barbara661320%ViewPDF
Santa Clara781215%ViewPDF
Santa Cruz582136%ViewPDF
Shasta721318%ViewPDF
Sierra8225%ViewPDF
Siskiyou391538%ViewPDF
Solano2628%ViewPDF
Sonoma1544529%ViewPDF
Stanislaus763141%ViewPDF
Sutter17741%ViewPDF
Tehama641727%ViewPDF
Trinity20630%ViewPDF
Tulare1136356%ViewPDF
Tuolumne531630%ViewPDF
Ventura732129%ViewPDF
Yolo21733%ViewPDF
Yuba291138%ViewPDF
Questions or comments?
Laljeet Sangha, Ph.D.
Assistant Cooperative Extension, Community Water Systems Advisor
1031 S. Mt. Vernon Avenue, Bakersfield, CA 93307
lsangha@ucanr.edu · lsanghah2o@gmail.com