💧 ZIP Water Report

Tap water in Hollister, CA — ZIP 95023

2 public water systems serving about 52,084 people. PFAS "forever chemicals" have been detected here.

C
Fair
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 95023

Hollister, City Of
PWSID CA3510001 · serves 26,598 · surface water
1 health-based / 3 total violations (5 yrs)
C
Sunnyslope County Water Dist
PWSID CA3510003 · serves 25,486 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 5.8 ppt — above federal limit
C

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