County · Illinois
Iroquois County, Illinois: drinking water records
This overview covers 23 ZIP codes and 25 community water systems in Iroquois County. It also stands in for 4 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Ashkum IL0750050 | 724 | 120 | 0 | 1 | 1.8 ppb |
| Watseka IL0750900 | 5,500 | 120 | 0 | 0 | 6 ppb |
| Danforth IL0750350 | 550 | 0 | 0 | 4 | 0 ppb |
| Buckley IL0750150 | 500 | 60 | 0 | 0 | 1.6 ppb |
| Beaverville IL0750100 | 450 | 0 | 0 | 2 | 0 ppb |
| Loda IL0750550 | 398 | 0 | 0 | 1 | 1.7 ppb |
| Woodland IL0751000 | 319 | 0 | 0 | 3 | 0 ppb |
| Donovan IL0750400 | 279 | 0 | 0 | 4 | 0 ppb |
| La Bella of Clifton IL0755389 | 55 | 0 | 0 | 2 | 0.7 ppb |
| Gilman IL0750450 | 1,793 | 0 | 0 | 0 | 2.8 ppb |
| Clifton IL0750250 | 1,500 | 0 | 0 | 0 | 2.2 ppb |
| Onarga IL0750700 | 1,409 | 0 | 0 | 0 | 0 ppb |
| Milford IL0750650 | 1,306 | 0 | 0 | 0 | 5.1 ppb |
| Chebanse IL0754240 | 1,044 | 0 | 0 | 0 | 1.6 ppb |
| Sheldon IL0750800 | 900 | 0 | 0 | 0 | 0 ppb |
| Cissna Park IL0750200 | 846 | 0 | 0 | 0 | 2.9 ppb |
| Lake Iroquois Association IL0755200 | 800 | 0 | 0 | 0 | 2 ppb |
| Crescent City IL0750300 | 650 | 0 | 0 | 0 | 1.5 ppb |
| Bayles Lake Lot Owners Association IL0755110 | 645 | 0 | 0 | 0 | 2 ppb |
| Martinton IL0750600 | 375 | 0 | 0 | 0 | 0 ppb |
| Thawville IL0750850 | 270 | 0 | 0 | 0 | 0 ppb |
| Wellington IL0750950 | 222 | 0 | 0 | 0 | 4.5 ppb |
| Watch E Kee Manufactured Home Community IL0755365 | 138 | 0 | 0 | 0 | 0 ppb |
| Sugar Creek Manufactured Home Comm., LLC IL0750910 | 115 | 0 | 0 | 0 | 2.2 ppb |
| Prairieview Lutheran Home IL0750020 | 113 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Iroquois County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 60926, 60939, 60945, 60967.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.