Water quality for ZIP code 60523
ZIP 60523 covers Oak Brook, Westmont, Oakbrook Terrace, Elmhurst, Lombard, and Downers Grove in DuPage County, Illinois, one of 37 ZIP codes in the 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 |
|---|---|---|---|---|
| Oak Brook Oak Brook |
9,400 | 3 | under 0.1 mi | |
| Oakbrook Terrace Oak Brook Terr |
1,440 | 0 | 1.4 mi | |
| York Township Water System Oak Brook Terr |
1,423 | 1 | 1.5 mi | |
| Liberty Park Homeowners Association |
950 | 3 | 2.2 mi | |
| Clarendon Hills Clarendon Hills |
8,702 | 1 | 2.8 mi | |
| Hinsdale Hinsdale |
17,900 | 1 | 2.8 mi | |
| Westmont Westmont |
24,161 | 0 | 3.1 mi | |
| DU Page Water Commission |
1 | 0 | 3.2 mi | |
| Villa Park Villa Park |
22,263 | 0 | 3.5 mi | |
| IL American-Clarendon |
625 | 2 | 3.6 mi | |
| Lombard Lombard |
44,476 | 2 | 4.1 mi | |
| Elmhurst Elmhurst |
45,000 | 0 | 4.2 mi | |
| Downers Grove Downers Grove |
49,425 | 0 | 4.4 mi | |
| Willowbrook Willowbrook |
9,000 | 3 | 5.0 mi | |
| IL American-Valley View |
6,721 | 0 | 5.2 mi | |
| IL American-Lombard Heights Lombard |
679 | 0 | 5.3 mi | |
| Glen Ellyn Glen Ellyn |
28,500 | 1 | 6.0 mi | |
| Darien Darien |
21,751 | 1 | 6.4 mi | |
| IL American-Country Club |
1,014 | 0 | 6.5 mi | |
| Burr Ridge Burr Ridge |
11,192 | 1 | 6.6 mi | |
| Lisle Lisle |
24,223 | 1 | 6.9 mi | |
| Glen Ellyn Heights Subdivision |
1,931 | 4 | 7.0 mi | |
| IL American-Dupage Utility |
6,613 | 0 | 7.1 mi | |
| Addison Addison |
38,017 | 1 | 7.1 mi | |
| Southeast Regional Water Facility |
6,940 | 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, the county this ZIP code lies in, nearest to the ZIP code's centre 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.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.