Water quality for ZIP code 46373
ZIP 46373 covers St. John and Schererville in Lake County, Indiana, one of 27 ZIP codes in the county. 111 active public water systems serve the county; 73 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
29 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Aqua Indiana Water Company |
1,350 | 1 | 2.7 mi | |
| Schererville Water Department Schererville |
30,000 | 1 | 2.7 mi | |
| Dyer Water Department Dyer |
16,800 | 0 | 4.0 mi | |
| Cedar Gardens MHP Cedar Lake |
34 | 1 | 4.2 mi | |
| Cedar Lake Mobile Home Park Cedar Lake |
200 | 0 | 5.2 mi | |
| Cedar Lake Water Works Cedar Lake |
4,600 | 8 | 5.4 mi | |
| Cedar Lake Bible Conference Grounds Cedar Lake |
150 | 0 | 5.4 mi | |
| Sunset Harbor Condominiums Cedar Lake |
40 | 1 | 5.6 mi | |
| Lakeshore Subdivision Association, Inc. Cedar Lake |
265 | 2 | 5.9 mi | |
| Bremerton Mobile Home Park Griffith |
79 | 1 | 5.9 mi | |
| Cedar Lake Robins Nest Schererville |
950 | 6 | 6.0 mi | |
| Griffith Water Department Griffith |
16,893 | 2 | 6.1 mi | |
| Crown Point Water Works Crown Point |
30,000 | 1 | 6.3 mi | |
| Crossings Mobile Home Park Merrillville |
100 | 2 | 6.9 mi | |
| Highland Water Works Highland (highlands) |
23,984 | 0 | 6.9 mi | |
| Munster Water Company Munster |
23,894 | 2 | 7.1 mi | |
| Noble Oaks Subdivision Water Association Cedar Lake |
70 | 0 | 8.2 mi | |
| Rockwell Shores Apartments Merrillville |
45 | 1 | 8.4 mi | |
| Fairway Regional Water District Cedar Lake |
210 | 3 | 8.8 mi | |
| Hammond Water Works Department Hammond |
78,384 | 1 | 11.2 mi | |
| Indiana American Water Lowell Lowell |
11,908 | 0 | 11.4 mi | |
| Cuii Twin Lakes Crown Point |
8,000 | 1 | 12.3 mi | |
| New Chicago Water Works Hobart |
5,500 | 0 | 12.6 mi | |
| Apple Valley Utilities, Inc. Hebron |
712 | 0 | 13.1 mi | |
| Indiana American Water Northwest Gary, Merrillville |
210,510 | 0 | 13.2 mi |
Non-community systems in Lake County (81: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Lake 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 Indiana 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.