Tap water in Okoboji, IA — ZIP 51355
3 public water systems serving about 16,799 people. PFAS "forever chemicals" have been detected here.
A
Excellent
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 51355
Iowa Lakes Regional Water - Osgood
PWSID IA3060001 · serves 9,021 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 5 ppt
Osceola Rural Water System-North
PWSID IA7227701 · serves 7,002 ·
groundwater
0 health-based / 0 total violations (5 yrs)
Okoboji Water Supply
PWSID IA3060091 · serves 776 ·
surface water
0 health-based / 0 total violations (5 yrs)
· PFAS up to 9.2 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology