Water quality in Tinley Park, Illinois
Tinley Park is in Cook County. 423 active public water systems serve the county; 220 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 Cook County
162 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| IL American-Fernway Westhaven |
5,521 | 0 | 2.3 mi | |
| Oak Forest Oak Forest |
27,478 | 2 | 3.7 mi | |
| Orland Park Orland Park |
58,020 | 1 | 4.0 mi | |
| Country Club Hills Country Club Hills |
16,500 | 2 | 4.3 mi | |
| IL American-Alpine Heights |
707 | 0 | 4.4 mi | |
| Matteson Matteson |
18,293 | 5 | 5.3 mi | |
| Aqua Illinois-Timber Ridge Matteson |
2,322 | 0 | 5.4 mi | |
| IL American-Midwest Palos |
126 | 0 | 5.4 mi | |
| Midlothian Midlothian |
14,819 | 1 | 5.8 mi | |
| Hazel Crest Hazel Crest |
13,792 | 2 | 6.0 mi | |
| Crestwood Crestwood |
10,826 | 2 | 6.2 mi | |
| Markham Markham |
12,500 | 4 | 6.3 mi | |
| Palos Heights Palos Heights |
15,500 | 1 | 6.5 mi | |
| Flossmoor Flossmoor |
9,371 | 1 | 6.7 mi | |
| Olympia Fields Olympia Fields |
4,922 | 3 | 6.8 mi | |
| Robbins Robbins |
5,415 | 6 | 7.2 mi | |
| Palos Park Palos Park |
4,873 | 0 | 7.3 mi | |
| South Palos Twsp Sanitary Dist |
2,800 | 3 | 7.4 mi | |
| Posen Posen |
5,331 | 3 | 7.4 mi | |
| Richton Park Richton Park |
12,504 | 5 | 7.5 mi | |
| Homewood Homewood |
19,463 | 2 | 7.6 mi | |
| Worth Worth |
10,970 | 1 | 7.7 mi | |
| Alsip Alsip |
19,063 | 1 | 7.9 mi | |
| East Hazel Crest East Hazel Crest |
1,500 | 1 | 8.2 mi | |
| Dixmoor Dixmoor |
2,973 | 5 | 8.3 mi |
Non-community systems in Cook County (260: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Cook County, nearest to Tinley Park 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 or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files or the centre of the town EPA lists the system as serving, from OpenStreetMap.
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.