Tap water in Dupo, IL — ZIP 62240
3 public water systems serving about 147,181 people. PFAS "forever chemicals" have been detected here.
D
Poor
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 62240
Il American-East St Louis
PWSID IL1635040 · serves 131,368 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 18.1 ppt
Columbia
PWSID IL1330050 · serves 11,129 ·
surface water
0 health-based / 2 total violations (5 yrs)
· PFAS up to 11.5 ppt
Dupo
PWSID IL1630350 · serves 4,684 ·
groundwater
0 health-based / 1 total violations (5 yrs)
· PFAS up to 5.6 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