💧 ZIP Water Report

Tap water in Antioch, CA — ZIP 94509

1 public water system serving about 116,781 people.

A
Excellent

Water systems serving 94509

City Of Antioch
PWSID CA0710001 · serves 116,781 · surface water
0 health-based / 0 total violations (5 yrs)
A

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