Tap water in Williamstown, IL — ZIP 62422
3 public water systems serving about 43,328 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 62422
Ej Water Cooperative
PWSID IL0790010 · serves 29,720 ·
surface water
0 health-based / 26 total violations (5 yrs)
· PFAS up to 6.2 ppt
Clark County Cons Pwsd 1
PWSID MO2024138 · serves 8,000 ·
groundwater
0 health-based / 2 total violations (5 yrs)
Fayette Water Company
PWSID IL0510010 · serves 5,608 ·
surface water
5 health-based / 11 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