Vallecitos WD

Water Quality Snapshot: Vallecitos WD

Vallecitos WD is a local-owned community water system that delivers drinking water to 113,500 residents in San Marcos, California (San Diego County) through 22,501 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. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is LEAD AND COPPER RULE REVISIONS, recorded in 1 violation (RPT). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Vallecitos WD'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.