Public water system SAFER profiles
Data date: July 31, 2026
58 counties

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
Alameda15213%ViewPDF
Alpine7114%ViewPDF
Amador21524%ViewPDF
Butte511529%ViewPDF
Calaveras21314%ViewPDF
Colusa9333%ViewPDF
Contra Costa421024%ViewPDF
Del Norte18633%ViewPDF
El Dorado23626%ViewPDF
Fresno1317154%ViewPDF
Glenn18317%ViewPDF
Humboldt501224%ViewPDF
Imperial351749%ViewPDF
Inyo471021%ViewPDF
Kern17810257%ViewPDF
Kings181056%ViewPDF
Lake441330%ViewPDF
Lassen20840%ViewPDF
Los Angeles2035427%ViewPDF
Madera864552%ViewPDF
Marin19316%ViewPDF
Mariposa16425%ViewPDF
Mendocino54917%ViewPDF
Merced392256%ViewPDF
Modoc6117%ViewPDF
Mono20735%ViewPDF
Monterey1696237%ViewPDF
Napa311135%ViewPDF
Nevada30620%ViewPDF
Orange4038%ViewPDF
Placer5635%ViewPDF
Plumas27311%ViewPDF
Riverside983132%ViewPDF
Sacramento732230%ViewPDF
San Benito361131%ViewPDF
San Bernardino1524731%ViewPDF
San Diego883641%ViewPDF
San Francisco500%ViewPDF
San Joaquin1164539%ViewPDF
San Luis Obispo802228%ViewPDF
San Mateo361028%ViewPDF
Santa Barbara661421%ViewPDF
Santa Clara791316%ViewPDF
Santa Cruz582034%ViewPDF
Shasta721521%ViewPDF
Sierra8225%ViewPDF
Siskiyou391436%ViewPDF
Solano2628%ViewPDF
Sonoma1554428%ViewPDF
Stanislaus763141%ViewPDF
Sutter17741%ViewPDF
Tehama641828%ViewPDF
Trinity20840%ViewPDF
Tulare1146154%ViewPDF
Tuolumne531630%ViewPDF
Ventura732027%ViewPDF
Yolo23939%ViewPDF
Yuba29931%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