Tap water in Ontario, CA — ZIP 91762
3 public water systems serving about 247,670 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 91762
Ontario Municipal Utilities Company
PWSID CA3610034 · serves 185,010 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 30 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
Bryan Co. Rws & Swmd #2
PWSID OK1010604 · serves 6,270 ·
surface water
3 health-based / 9 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