Browse Water Systems
25,913 public water systems in IL.
Public Water Systems Database
Browse 25,913 EPA-regulated public water systems with identifiers, population served, and water source type. Use the filters below to narrow results by state, system type, or name.
| System Name | PWSID | State | Type | Population Served |
|---|---|---|---|---|
| WHEELING | IL0314970 | IL | Community | 39,725 |
| STREAMWOOD | IL0313060 | IL | Community | 39,577 |
| ROCK ISLAND | IL1610650 | IL | Community | 39,018 |
| OSWEGO | IL0930150 | IL | Community | 38,169 |
| ADDISON | IL0430050 | IL | Community | 38,017 |
| CARPENTERSVILLE | IL0890200 | IL | Community | 37,983 |
| HANOVER PARK | IL0314480 | IL | Community | 37,470 |
| CALUMET CITY | IL0310390 | IL | Community | 37,000 |
| NORTH PARK PWD | IL2015500 | IL | Community | 35,580 |
| ELK GROVE VILLAGE | IL0314400 | IL | Community | 34,700 |
| NORTHBROOK | IL0312070 | IL | Community | 34,407 |
| WOODRIDGE | IL0431250 | IL | Community | 33,566 |
| VERNON HILLS - LAKE CO PW | IL0971750 | IL | Community | 33,207 |
| GLENDALE HEIGHTS | IL0430400 | IL | Community | 33,176 |
| ST CHARLES | IL0894830 | IL | Community | 33,103 |
| IL AMERICAN-PEKIN | IL1795040 | IL | Community | 31,731 |
| GALESBURG | IL0950200 | IL | Community | 31,620 |
| MUNDELEIN | IL0971150 | IL | Community | 31,500 |
| ALGONQUIN | IL1110050 | IL | Community | 30,700 |
| GURNEE | IL0970350 | IL | Community | 30,193 |
| HIGHLAND PARK | IL0970500 | IL | Community | 30,176 |
| AQUA ILLINOIS-VERMILION COUNTY | IL1835120 | IL | Community | 30,106 |
| AQUA ILLINOIS-NORTH MAINE UTILITIES | IL0315350 | IL | Community | 30,043 |
| SOUTH STICKNY SD | IL0317370 | IL | Community | 30,000 |
| PENTACOSTAL CHURCH CAMP | IL0044883 | IL | Transient Non-Community | 30,000 |
| EJ WATER COOPERATIVE | IL0790010 | IL | Community | 29,720 |
| COLLINSVILLE | IL1194280 | IL | Community | 29,500 |
| NILES | IL0312010 | IL | Community | 29,350 |
| LANSING | IL0311590 | IL | Community | 29,076 |
| MONTGOMERY | IL0894690 | IL | Community | 28,956 |
| GLEN ELLYN | IL0430450 | IL | Community | 28,850 |
| LAKE IN THE HILLS | IL1110400 | IL | Community | 28,661 |
| HUNTLEY | IL1110350 | IL | Community | 28,495 |
| NEW LENOX | IL1970700 | IL | Community | 27,690 |
| IL AMERICAN-GRANITE CITY | IL1195030 | IL | Community | 27,549 |
| OAK FOREST | IL0312190 | IL | Community | 27,478 |
| ROUND LAKE BEACH | IL0971550 | IL | Community | 27,200 |
| WILMETTE | IL0313300 | IL | Community | 27,087 |
| EDWARDSVILLE | IL1190250 | IL | Community | 26,808 |
| CHICAGO HEIGHTS | IL0310450 | IL | Community | 26,184 |
| BATAVIA | IL0894130 | IL | Community | 26,098 |
| WOODSTOCK | IL1110950 | IL | Community | 25,630 |
| MORTON GROVE | IL0311950 | IL | Community | 25,297 |
| WEST CHICAGO | IL0430900 | IL | Community | 25,166 |
| BELVIDERE | IL0070050 | IL | Community | 25,070 |
| HARVEY | IL0311110 | IL | Community | 25,000 |
| ELMWOOD PARK | IL0310780 | IL | Community | 25,000 |
| ILLINOIS SYNOD L.C.A. | IL0001867 | IL | Transient Non-Community | 25,000 |
| ILLINOIS SYNOD L.C.A. | IL0001859 | IL | Transient Non-Community | 25,000 |
| IL AMERICAN-HOMER TOWNSHIP | IL1970100 | IL | Community | 24,543 |