Water quality for ZIP code 48340
ZIP 48340 covers Pontiac in Oakland County, Michigan, one of 68 ZIP codes in the county. 729 active public water systems serve the county; 204 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 Oakland County
107 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Auburn Hills Auburn Hills |
21,412 | 0 | 2.2 mi | |
| Orion Lake Estates MHC |
1,058 | 2 | 3.7 mi | |
| College Heights Mobile Home Park |
405 | 0 | 4.3 mi | |
| Sylvan Lake Sylvan Lake |
2,155 | 0 | 4.6 mi | |
| Waterford Township Waterford |
73,441 | 1 | 5.0 mi | |
| Keego Harbor, City of Keego Harbor |
2,740 | 0 | 5.3 mi | |
| Southwest Oakland Township |
4,943 | 0 | 6.0 mi | |
| Orion Township |
33,000 | 0 | 6.1 mi | |
| Shorewood Hills Subdivision |
256 | 1 | 6.1 mi | |
| Independence Township |
11,790 | 0 | 6.5 mi | |
| Cass Lakeside Subdivision |
700 | 0 | 6.5 mi | |
| Rochester Hills Rochester Hills |
74,000 | 0 | 6.7 mi | |
| Sunnydale Gardens Water Association |
190 | 2 | 6.7 mi | |
| Bloomfield Township |
41,691 | 0 | 6.8 mi | |
| Bloomfield Hills Bloomfield Hills |
3,579 | 0 | 6.8 mi | |
| Orchard Lake Village Orchard Lake |
2,194 | 0 | 7.4 mi | |
| Plum Creek Sub |
105 | 0 | 7.7 mi | |
| Rochester Rochester |
7,130 | 0 | 7.9 mi | |
| Lake Orion, Village of Lake Orion |
2,973 | 0 | 7.9 mi | |
| Hillview Estates Subdivision |
354 | 0 | 8.0 mi | |
| Lakeview Apartments |
50 | 2 | 8.1 mi | |
| Lakeshore Hilltop Apartments |
93 | 3 | 8.1 mi | |
| Lakeview Chalet Condominiums |
50 | 6 | 8.2 mi | |
| Manitou Lake Apartments |
75 | 2 | 8.4 mi | |
| Deerwood Subdivision |
1,824 | 0 | 8.5 mi |
Non-community systems in Oakland County (621: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Oakland 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 county subdivision files or 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 Michigan 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.