All water systems in Michigan
11,156 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Bay Area Water System Bay City · Bay County |
0 | 0 | 0 | |
|
Gratiot Area Water Authority Gratiot County |
0 | 0 | 0 | |
|
Great Lakes Water Authority Detroit · Wayne County |
0 | 2 | 0 | |
|
Huron Regional Water Authority Bad Axe, Port Austin · Huron County |
0 | 0 | 0 | |
|
Negaunee/ishpeming Water Authority Marquette County |
0 | 0 | 0 | |
|
Southeastern Oakland CO W Auth Oakland County |
0 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
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.