Water quality in Naperville, Illinois
Naperville is in DuPage County. 208 active public water systems serve the county; 46 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in DuPage County
47 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Steeple Run Sbdv |
1,931 | 1 | 3.9 mi | |
| IL American-Dupage Utility |
6,613 | 0 | 5.4 mi | |
| Lisle Lisle |
24,223 | 1 | 5.7 mi | |
| Warrenville Warrenville |
12,350 | 1 | 5.9 mi | |
| IL American-Arrowhead |
1,581 | 0 | 6.2 mi | |
| Woodridge Woodridge |
33,566 | 1 | 6.3 mi | |
| Wheaton Wheaton |
53,970 | 1 | 7.9 mi | |
| IL American-Valley View |
6,721 | 0 | 8.2 mi | |
| Downers Grove Downers Grove |
49,425 | 0 | 8.3 mi | |
| Winfield Winfield |
9,835 | 0 | 8.8 mi | |
| IL American-Liberty Ridge West |
3,307 | 0 | 9.2 mi | |
| Darien Darien |
21,751 | 1 | 9.5 mi | |
| Pleasant Ridge MHP |
284 | 2 | 9.7 mi | |
| Glen Ellyn Glen Ellyn |
28,500 | 1 | 9.7 mi | |
| IL American-Liberty Ridge East Wheaton |
320 | 0 | 10.3 mi | |
| Westmont Westmont |
24,161 | 0 | 10.4 mi | |
| Liberty Park Homeowners Association |
950 | 3 | 10.5 mi | |
| Southeast Regional Water Facility |
6,940 | 1 | 10.8 mi | |
| West Chicago West Chicago |
25,166 | 0 | 10.9 mi | |
| IL American-Clarendon |
625 | 2 | 11.2 mi | |
| Clarendon Hills Clarendon Hills |
8,702 | 1 | 11.3 mi | |
| Willowbrook Willowbrook |
9,000 | 3 | 11.4 mi | |
| Lombard Lombard |
44,476 | 2 | 11.6 mi | |
| Glen Ellyn Heights Subdivision |
1,931 | 4 | 11.6 mi | |
| Carol Stream Carol Stream |
39,854 | 3 | 11.7 mi |
Non-community systems in DuPage County (160: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to DuPage County, nearest to Naperville first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Illinois records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.