Tap water in Pomona, CA — ZIP 91766
2 public water systems serving about 208,103 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 91766
Pomona - City, Water Dept.
PWSID CA1910126 · serves 151,713 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 18 ppt — above federal limit
Monte Vista Wd
PWSID CA3610029 · serves 56,390 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 11 ppt — above federal limit
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology