County · Illinois
Boone County, Illinois: drinking water records
This overview covers 5 ZIP codes and 8 community water systems in Boone County. It also stands in for 1 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 |
|---|---|---|---|---|---|
| Belvidere IL0070050 | 25,339 | 300 | 1 | 0 | 1.8 ppb |
| Aqua Illinois-Candlewick Dvn IL0075050 | 6,426 | 60 | 0 | 0 | 1.5 ppb |
| Poplar Grove West-Countryside IL0070350 | 790 | 60 | 0 | 0 | 0 ppb |
| Poplar Grove IL0070150 | 2,372 | 0 | 0 | 0 | 0 ppb |
| Poplar Grove South IL0070300 | 1,877 | 0 | 0 | 0 | 5 ppb |
| Capron IL0070100 | 1,343 | 0 | 0 | 0 | 0 ppb |
| Greenview Estates MHP IL0070060 | 710 | 0 | 0 | 0 | 0 ppb |
| Oak Lawn MHP IL0075275 | 450 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Boone 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: 61038.
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.