County · Illinois
Madison County, Illinois: drinking water records
This overview covers 28 ZIP codes and 36 community water systems in Madison 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 |
|---|---|---|---|---|---|
| Holiday Shores Sd IL1195110 | 2,840 | 120 | 2 | 3 | 3.7 ppb |
| Moro Pwd IL1195250 | 723 | 60 | 3 | 1 | 0 ppb |
| Il American-Alton IL1195150 | 46,127 | 120 | 3 | 0 | 3 ppb |
| Il American-Granite City IL1195030 | 33,572 | 120 | 3 | 0 | 6 ppb |
| Collinsville IL1194280 | 29,500 | 60 | 8 | 0 | 4.5 ppb |
| Edwardsville IL1190250 | 26,808 | 60 | 1 | 0 | 0 ppb |
| Troy IL1191000 | 16,962 | 60 | 1 | 0 | 0 ppb |
| Bethalto IL1190150 | 15,210 | 60 | 2 | 0 | 1 ppb |
| Glen Carbon IL1190300 | 12,618 | 120 | 3 | 0 | 0 ppb |
| Highland IL1190550 | 10,674 | 120 | 1 | 0 | 1.7 ppb |
| Wood River IL1191150 | 10,464 | 60 | 3 | 0 | 0 ppb |
| Maryville IL1190750 | 10,150 | 60 | 0 | 0 | 2 ppb |
| Fosterburg Pwd IL1195220 | 7,940 | 120 | 3 | 0 | 0 ppb |
| East Alton IL1190200 | 5,786 | 60 | 8 | 0 | 0 ppb |
| Mitchell Pwd IL1195210 | 5,253 | 120 | 4 | 0 | 0 ppb |
| North East Central Pwd IL1195280 | 3,975 | 60 | 4 | 0 | 1.3 ppb |
| Three County Pwd IL1195450 | 3,575 | 0 | 0 | 5 | 0 ppb |
| Tritownship Water District IL1190080 | 3,470 | 120 | 0 | 0 | 1.3 ppb |
| Pontoon Beach Pwd IL1195300 | 3,325 | 120 | 3 | 0 | 0.6 ppb |
| Southern Il University-Edwardsville IL1195550 | 2,817 | 60 | 2 | 0 | 1.8 ppb |
| St Jacob IL1190950 | 1,835 | 0 | 0 | 2 | 0 ppb |
| Grantfork IL1190350 | 1,766 | 0 | 0 | 1 | 0 ppb |
| Pierron IL1194760 | 1,709 | 0 | 0 | 2 | 0 ppb |
| South Roxana IL1190970 | 1,891 | 0 | 0 | 0 | 0 ppb |
| Meadowbrook Pwd IL1195200 | 1,778 | 0 | 0 | 0 | 1.8 ppb |
ZIP reports in Madison 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.