Michigan: drinking water & radon
Michigan has 1,436 active community water systems. Since 2016, 315 reported health-based violations; 52 had a latest lead result above 15 ppb; 9 measured PFOA or PFOS at or above 4 ppt.
Radon zones in Michigan
tap a countyMost health-based violations
| Buttonwood Bay MHP 2,000 people | 23 |
| Benton Harbor 9,103 people | 20 |
| Deerfield 943 people | 19 |
| Waters Edge Mh Community 180 people | 17 |
| Nahma Township 95 people | 13 |
| Green Brook Estates 40 people | 11 |
| Fenton Harbor Condominiums 40 people | 10 |
| Michiana Estates LLC - Water System 35 people | 10 |
| Northwoods Community 238 people | 9 |
| Battle Creek - Verona System 43,975 people | 9 |
Highest latest lead (90th percentile)
| Medilodge of Sterling 39 people | 888 ppb |
| Meadowbrook Med Care Facility 154 people | 375 ppb |
| Woods and Fields Communities West 185 people | 135 ppb |
| Hidden Hamlet Association 465 people | 55 ppb |
| Hess Lake Rv and Mobile Home Park 160 people | 48.9 ppb |
| Lake Isabella Water Dist. #1 327 people | 41 ppb |
| Kent Ridge Apartments 120 people | 36.1 ppb |
| Thunderbird Terrace MHP 122 people | 34.7 ppb |
| Grand Pointe Subdivision 219 people | 34 ppb |
| Hale Homestead Apartments 72 people | 31 ppb |
Highest PFOA / PFOS
| Dundee 5,400 people | 13 ppt |
| Gladstone 4,632 people | 11 ppt |
| Independence Township 11,790 people | 10 ppt |
| Kalamazoo 192,992 people | 6.7 ppt |
| Spring Lake Township 9,393 people | 4.8 ppt |
| St. Lucie Mobile Village 750 people | 4.8 ppt |
| Fremont 4,516 people | 4.7 ppt |
| Grand Haven 10,412 people | 4.7 ppt |
| Otsego 4,120 people | 4 ppt |
Largest systems
| City of Detroit 633,218 people | 633,218 |
| Grand Rapids 306,901 people | 306,901 |
| Kalamazoo 192,992 people | 192,992 |
| Lansing Board of Water & Light 166,000 people | 166,000 |
| City of Warren 134,056 people | 134,056 |
| City of Sterling Heights 127,000 people | 127,000 |
| ANN Arbor 123,851 people | 123,851 |
| Dearborn 109,976 people | 109,976 |
| Clinton Township 100,513 people | 100,513 |
| Canton Township 99,627 people | 99,627 |
All ZIP codes in Michigan
1,154 ZIP codes.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions
How many water systems in Michigan have violations?
315 of 1,436 active community water systems in Michigan reported at least one health-based violation since 2016 (EPA SDWIS).
What is the radon risk in Michigan?
135 ZIP codes are in EPA radon zone 1 (highest potential), 490 in zone 2 and 529 in zone 3. EPA recommends testing every home.