💧 ZIP Water Report

Tap water in Martinez, CA — ZIP 94523

3 public water systems serving about 1,709,515 people. PFAS "forever chemicals" have been detected here.

A
Excellent
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5 testing. Levels and the 2024 federal limits are shown per system below.

Water systems serving 94523

East Bay Mud
PWSID CA0110005 · serves 1,468,000 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 5.2 ppt
A
Contra Costa Water District
PWSID CA0710003 · serves 210,500 · surface water
0 health-based / 0 total violations (5 yrs)
A
City Of Martinez
PWSID CA0710006 · serves 31,015 · 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