Water quality for ZIP code 46307
ZIP 46307 covers Crown Point, Winfield, Merrillville, Schererville, Lakes of the Four Seasons, and St. John 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 |
|---|---|---|---|---|
| Rockwell Shores Apartments Merrillville |
45 | 1 | 4.4 mi | |
| Cedar Lake Robins Nest Schererville |
950 | 6 | 4.7 mi | |
| Cuii Twin Lakes Crown Point |
8,000 | 1 | 4.9 mi | |
| Sunset Harbor Condominiums Cedar Lake |
40 | 1 | 5.1 mi | |
| Cedar Lake Water Works Cedar Lake |
4,600 | 8 | 6.0 mi | |
| Cedar Lake Bible Conference Grounds Cedar Lake |
150 | 0 | 6.3 mi | |
| Fairway Regional Water District Cedar Lake |
210 | 3 | 6.3 mi | |
| Lakeshore Subdivision Association, Inc. Cedar Lake |
265 | 2 | 6.3 mi | |
| Cedar Lake Mobile Home Park Cedar Lake |
200 | 0 | 6.4 mi | |
| Apple Valley Utilities, Inc. Hebron |
712 | 0 | 7.5 mi | |
| Cedar Gardens MHP Cedar Lake |
34 | 1 | 7.6 mi | |
| Noble Oaks Subdivision Water Association Cedar Lake |
70 | 0 | 7.7 mi | |
| Schererville Water Department Schererville |
30,000 | 1 | 7.7 mi | |
| St. John Municipal Water Utility St. John |
25,700 | 0 | 8.0 mi | |
| Crossings Mobile Home Park Merrillville |
100 | 2 | 8.6 mi | |
| Indiana American Water Lowell Lowell |
11,908 | 0 | 9.1 mi | |
| Bremerton Mobile Home Park Griffith |
79 | 1 | 9.9 mi | |
| Aqua Indiana Water Company |
1,350 | 1 | 10.1 mi | |
| Griffith Water Department Griffith |
16,893 | 2 | 10.2 mi | |
| Indiana American Water Northwest Gary, Merrillville |
210,510 | 0 | 10.8 mi | |
| New Chicago Water Works Hobart |
5,500 | 0 | 11.0 mi | |
| Dyer Water Department Dyer |
16,800 | 0 | 11.4 mi | |
| Highland Water Works Highland (highlands) |
23,984 | 0 | 12.1 mi | |
| Oakwood Mobile Home Park Lowell |
45 | 1 | 12.9 mi | |
| Munster Water Company Munster |
23,894 | 2 | 13.5 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.