City Water Quality Rankings in California
599 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#529
Meadow Vista
County, CA
79 B
#530 Twin Bridges
County, CA
79 B
#531 Baker
County, CA
77 B
#532 Coarsegold
County, CA
76 B
#533 Pismo Beach
County, CA
76 B
#534 Vacaville
County, CA
76 B
#535 Westmorland
County, CA
76 B
#536 Bishop
County, CA
75 B
#537 Bradley
County, CA
75 B
#538 Green Valley Lake
County, CA
75 B
#539 Chula Vista
County, CA
74 C
#540 Fort Bragg
County, CA
74 C
#541 Groveland
County, CA
74 C
#542 Mt. Shasta
County, CA
74 C
#543 Murphys
County, CA
74 C
#544 Orange Cove
County, CA
74 C
#545 Redding
County, CA
74 C
#546 Calexico
County, CA
72 C
#547 Goleta
County, CA
72 C
#548 Kettleman City
County, CA
72 C
#549 Tipton
County, CA
71 C
#550 Mccloud
County, CA
70 C
#551 Paradise
County, CA
70 C
#552 Avenal
County, CA
69 C
Frequently Asked Questions
How are city water quality rankings calculated in California?
WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.
Can I compare two cities in California?
Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.
How often does WaterQ refresh city data?
City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.