Water quality in Deerfield, Illinois
Deerfield is in Lake County. 535 active public water systems serve the county; 213 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 Lake County
102 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Bannockburn Bannockburn |
1,013 | 0 | 2.2 mi | |
| Riverwoods Riverwoods |
3,618 | 1 | 2.3 mi | |
| Highland Park Highland Park |
30,176 | 0 | 2.4 mi | |
| Highwood Highwood |
5,335 | 1 | 3.4 mi | |
| Lcpw Pekara Subdivision |
3,711 | 0 | 4.0 mi | |
| Lincolnshire Lincolnshire |
7,940 | 1 | 4.2 mi | |
| Elm Oak Mutual Water System |
50 | 1 | 5.0 mi | |
| Lake Forest Lake Forest |
19,642 | 1 | 5.1 mi | |
| Briarcrest Sbdv Homeowners Association |
207 | 2 | 7.0 mi | |
| Promontory Pointe Homeowners Association Long Grove |
78 | 2 | 7.4 mi | |
| Ciel Senior Living Vernon Hills |
225 | 1 | 7.4 mi | |
| Vernon Hills Lake CO PW Vernon Hills |
33,207 | 1 | 7.6 mi | |
| Lake Bluff Lake Bluff |
5,600 | 2 | 8.0 mi | |
| Central Lake County Jawa Lake Bluff |
0 | 0 | 8.2 mi | |
| Lake Bluff Estates MHP Lake Bluff |
165 | 1 | 8.4 mi | |
| Fields of Long Grove |
267 | 1 | 8.5 mi | |
| Alden Long Grove Nursing Center Long Grove |
218 | 0 | 8.5 mi | |
| The Preserve at Long Grove Long Grove |
204 | 5 | 8.5 mi | |
| Avantara Long Grove Long Grove |
200 | 0 | 8.5 mi | |
| Long Grove Long Grove |
70 | 1 | 8.5 mi | |
| New Perspective Senior Living Long Grove |
62 | 0 | 8.5 mi | |
| Aqua Illinois-Ravenna |
267 | 1 | 8.8 mi | |
| Prairie Trails of Long Grove |
189 | 1 | 8.9 mi | |
| Lake Co. PW Arden Shores Estates |
105 | 0 | 9.0 mi | |
| Towners Subdivision |
206 | 2 | 9.1 mi |
Non-community systems in Lake County (432: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Lake County, nearest to Deerfield 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.
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.