Water quality in Oak Brook Terr, Illinois
Oak Brook Terr 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 |
|---|---|---|---|---|
| Aqua Illinois-Oak Brook Oak Brook |
5,361 | 0 | under 0.1 mi | |
| York Township Water System Oak Brook Terr |
1,423 | 1 | 0.2 mi | |
| Oak Brook Oak Brook |
9,400 | 3 | 1.3 mi | |
| Villa Park Villa Park |
22,263 | 0 | 2.3 mi | |
| Liberty Park Homeowners Association |
950 | 3 | 2.6 mi | |
| Lombard Lombard |
44,476 | 2 | 2.6 mi | |
| DU Page Water Commission |
1 | 0 | 3.3 mi | |
| Elmhurst Elmhurst |
45,000 | 0 | 3.6 mi | |
| Clarendon Hills Clarendon Hills |
8,702 | 1 | 3.8 mi | |
| Westmont Westmont |
24,161 | 0 | 3.8 mi | |
| IL American-Lombard Heights Lombard |
679 | 0 | 3.9 mi | |
| Hinsdale Hinsdale |
17,900 | 1 | 4.2 mi | |
| IL American-Valley View |
6,721 | 0 | 4.3 mi | |
| Downers Grove Downers Grove |
49,425 | 0 | 4.5 mi | |
| IL American-Clarendon |
625 | 2 | 4.6 mi | |
| Glen Ellyn Glen Ellyn |
28,500 | 1 | 4.7 mi | |
| Glen Ellyn Heights Subdivision |
1,931 | 4 | 5.6 mi | |
| Addison Addison |
38,017 | 1 | 5.8 mi | |
| IL American-Country Club |
1,014 | 0 | 5.8 mi | |
| Willowbrook Willowbrook |
9,000 | 3 | 6.1 mi | |
| Lisle Lisle |
24,223 | 1 | 6.4 mi | |
| IL American-Liberty Ridge East Wheaton |
320 | 0 | 6.4 mi | |
| IL American-Dupage Utility |
6,613 | 0 | 6.8 mi | |
| Wheaton Wheaton |
53,970 | 1 | 7.0 mi | |
| Darien Darien |
21,751 | 1 | 7.2 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 Oak Brook Terr 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.