County · Illinois
Will County, Illinois: drinking water records
This overview covers 30 ZIP codes and 51 community water systems in Will County. It also stands in for 0 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 |
|---|---|---|---|---|---|
| Joliet IL1970450 | 160,000 | 660 | 0 | 1 | 6.5 ppb |
| Crest Hill IL1970250 | 21,169 | 420 | 7 | 1 | 2.1 ppb |
| Aqua Illinois-University Park IL1975030 | 7,002 | 120 | 2 | 1 | 0 ppb |
| Il American-West Suburban IL1974151 | 73,978 | 120 | 0 | 0 | 0 ppb |
| Romeoville IL1970900 | 50,458 | 450 | 3 | 0 | 8.2 ppb |
| Plainfield IL1970800 | 50,000 | 120 | 0 | 0 | 0 ppb |
| New Lenox IL1970700 | 27,690 | 120 | 0 | 0 | 0 ppb |
| Il American-Homer Township IL1970100 | 24,543 | 120 | 0 | 0 | 0 ppb |
| Frankfort IL1970400 | 24,000 | 360 | 0 | 0 | 1.0 ppb |
| Lockport IL1970500 | 23,100 | 420 | 4 | 0 | 30 ppb |
| Mokena IL1970600 | 19,887 | 120 | 0 | 0 | 0 ppb |
| Shorewood IL1975080 | 18,645 | 300 | 1 | 0 | 0 ppb |
| Channahon IL1970200 | 13,380 | 180 | 6 | 0 | 0 ppb |
| Manhattan IL1970550 | 10,340 | 120 | 0 | 0 | 1.6 ppb |
| Crete IL1970300 | 8,275 | 300 | 0 | 0 | 13 ppb |
| Braidwood IL1970150 | 6,194 | 60 | 0 | 0 | 1.4 ppb |
| Wilmington IL1971100 | 5,700 | 120 | 4 | 0 | 5.0 ppb |
| Monee IL1970650 | 5,148 | 180 | 0 | 0 | 0 ppb |
| Aqua Illinois-Willowbrook IL1977870 | 5,100 | 180 | 0 | 0 | 1 ppb |
| Beecher IL1970050 | 4,713 | 180 | 0 | 0 | 0 ppb |
| Aqua Illinois-Peotone IL1970750 | 4,182 | 120 | 0 | 0 | 0 ppb |
| Southeast Joliet Sd IL1977490 | 2,000 | 0 | 0 | 1 | 0 ppb |
| Crystal Lawns Addition Improvement Assoc IL1975480 | 1,435 | 300 | 2 | 0 | 3.4 ppb |
| East Moreland Wtr Service Assn IL1975600 | 1,320 | 0 | 0 | 1 | 3.8 ppb |
| Stateville Correctional Center IL1977910 | 992 | 0 | 0 | 2 | 4.0 ppb |
ZIP reports in Will County
No ZIP report in this county is published yet.
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.