Water quality for ZIP code 70457
St. Tammany Parish, Louisiana, one of 16 ZIP codes in the county. 207 active public water systems serve the county; 92 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in St. Tammany Parish
93 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| ST Tam Parish Bedico -Faubourg-Coquille |
18,372 | 0 | |
| ST Tam Parish Briarwood Terrace |
17,536 | 1 | |
| City of Covington Water Supply |
16,185 | 3 | |
| City of Mandeville Water Supply |
13,000 | 0 | |
| Utilities INC North Park Water Supply |
11,298 | 0 | |
| Bayou Liberty Water Association |
10,791 | 0 | |
| Magnolia-Eden Isles |
10,155 | 0 | |
| ST Tam Parish Cross Gates SD |
8,037 | 0 | |
| Magnolia-Greenleaves |
8,031 | 0 | |
| Lee Road Water Corporation |
7,665 | 0 | |
| Magnolia-Resolve Whisperwood |
6,867 | 0 | |
| Utilities INC Kingspoint Subdivision |
6,351 | 0 | |
| ST Tammany Water District #2 |
5,200 | 0 | |
| Magnolia-The Meadows |
4,701 | 1 | |
| Beau Chene Water System |
4,650 | 0 | |
| Magnolia-Lakeshore Estates |
4,146 | 0 | |
| Town of Abita Springs Water System |
3,693 | 0 | |
| Town of Pearl River |
3,333 | 0 | |
| ST Tammany Water District 3 |
2,920 | 3 | |
| Magnolia-Guste Island |
2,847 | 0 | |
| Utilities INC Lake Village SD |
2,724 | 0 | |
| ST Tam Parish Pineland Park Subd |
2,500 | 0 | |
| Utilities INC Green Brier Water Supply |
2,250 | 0 | |
| Utilities INC Huntwyck Village |
2,088 | 0 | |
| Village of Folsom Water Supply |
1,992 | 0 |
Non-community systems in St. Tammany Parish (113: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to St. Tammany Parish, the county this ZIP code lies in, largest 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.
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 Louisiana 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.