Tap water in Hannibal, MO — ZIP 63401
3 public water systems serving about 32,770 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 63401
Hannibal Pws
PWSID MO2010344 · serves 17,108 ·
surface water
1 health-based / 2 total violations (5 yrs)
· PFAS up to 12.4 ppt
Clark County Cons Pwsd 1
PWSID MO2024138 · serves 8,000 ·
groundwater
0 health-based / 2 total violations (5 yrs)
Ralls County Pwsd 1
PWSID MO2024499 · serves 7,662 ·
groundwater
4 health-based / 4 total violations (5 yrs)
· PFAS up to 79.9 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