💧 ZIP Water Report

Tap water in St. Helena, CA — ZIP 94574

1 public water system serving about 5,386 people.

F
Failing

Water systems serving 94574

St. Helena, City Of
PWSID CA2810004 · serves 5,386 · surface water
3 health-based / 4 total violations (5 yrs)
F

Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology