Tap water in Porterville, CA — ZIP 93257
3 public water systems serving about 217,348 people. PFAS "forever chemicals" have been detected here.
F
Failing
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 93257
Cws - Visalia
PWSID CA5410016 · serves 153,522 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 34 ppt — above federal limit
Porterville, City Of
PWSID CA5410010 · serves 63,487 ·
groundwater
1 health-based / 2 total violations (5 yrs)
· PFAS up to 23 ppt — above federal limit
Porterville-Jones Corner
PWSID CA5410048 · serves 339 ·
groundwater
1 health-based / 2 total violations (5 yrs)
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology