California Water Service - Stockton

Water Quality Snapshot: California Water Service - Stockton

California Water Service - Stockton is a private-owned community water system that delivers drinking water to 176,266 residents in San Jose, California (San Joaquin County) through 44,359 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 2 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed.

No specific contaminant violations have been recorded in EPA's detailed violation register for this system. Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 5.2 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across California, EPA tracks 7,249 public water systems serving 42,404,883 people, with 153,308 cumulative violations and 63,983 health-based violations on record. About 89% of systems in the state carry at least one violation, and state-wide the average per system is 21.1 violations. Statewide, 447 of 694 UCMR5-tested systems have reported PFAS detections (64.4%).

California Water Service - Stockton's 2 violations sit below the California average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.