Water quality for ZIP code 53538
ZIP 53538 covers Lake Koshkonong, Fort Atkinson, and Hebron in Jefferson County, Wisconsin, one of 10 ZIP codes in the county. 194 active public water systems serve the county; 28 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 Jefferson County
26 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Oak Ridge Mobile Com 3 Fort Atkinson |
58 | 0 | 0.6 mi | |
| Oak Ridge Mobile Com 1 & 2 Fort Atkinson |
133 | 0 | 4.9 mi | |
| Wolfs Mobile Homes Whitewater |
40 | 3 | 5.5 mi | |
| Oak Ridge Mobile Com 4 Fort Atkinson |
60 | 1 | 5.7 mi | |
| Jefferson Waterworks Jefferson |
7,926 | 3 | 6.2 mi | |
| Breezy Knoll Community Cambridge |
116 | 0 | 7.8 mi | |
| Rock River Mobile Home Park Johnson Creek |
30 | 4 | 10.0 mi | |
| Ripview Court 1 Cambridge |
35 | 0 | 10.2 mi | |
| Ripview Court 4 Cambridge |
35 | 0 | 10.2 mi | |
| Ripview Court 2 Cambridge |
31 | 0 | 10.2 mi | |
| Ripview Court 3 Cambridge |
31 | 0 | 10.2 mi | |
| Lake Mills Waterworks Lake Mills |
6,211 | 2 | 11.0 mi | |
| Johnson Creek Waterworks Johnson Creek |
3,318 | 4 | 11.7 mi | |
| Palmyra Waterworks Palmyra |
1,756 | 0 | 13.6 mi | |
| Tremain Mobile Home Park Dousman |
475 | 4 | 15.7 mi | |
| Spacious Acres Mobile Home Community Sullivan |
525 | 0 | 15.9 mi | |
| Waterloo Waterworks Waterloo |
3,520 | 2 | 19.6 mi | |
| Watertown Waterworks Watertown |
23,945 | 1 | 19.8 mi | |
| Autumn Ridge Water System LLC Ixonia |
575 | 2 | 19.8 mi | |
| Stanton Place II Ixonia |
32 | 0 | 20.0 mi | |
| Hickory Hill Park LLC Watertown |
31 | 0 | 20.0 mi | |
| River Valley Apts South Ixonia |
48 | 1 | 20.1 mi | |
| Stanton Place I Ixonia |
66 | 0 | 20.2 mi | |
| Parkview Apartments Ixonia |
45 | 2 | 20.3 mi | |
| River Valley Apts North Ixonia |
48 | 1 | 20.8 mi |
Non-community systems in Jefferson County (167: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Jefferson 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 or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
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 Wisconsin 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.