Michigan Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), Michigan has 1,434 active community water systems in this extract. PlainEnviro's health-based slice lists 1,120 violation records across 50 systems with at least one such row. These are historical EPA registry counts, not a statewide drinkability score.
Health-based violation records for 1,434 community water systems in Michigan. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | DEERFIELD Deerfield | 36 | Yes |
| 2 | CAMP INN ASSOCIATES, LLC Farmington Hills | 29 | Yes |
| 3 | BUTTONWOOD BAY MHP Southfield | 23 | Yes |
| 4 | NAHMA TOWNSHIP Nahma | 22 | Yes |
| 5 | FENTON HARBOR CONDOMINIUMS Grand Blanc | 21 | Yes |
| 6 | RIGA TOWNSHIP Riga | 20 | Yes |
| 7 | SOMERSET MOBILE HOME PARK Coldwater | 19 | Yes |
| 8 | WATERS EDGE MH COMMUNITY Adrian | 19 | Yes |
| 9 | ROSE HILL CENTER Holly | 18 | Yes |
| 10 | BENTON HARBOR Benton Harbor | 16 | Yes |
| 11 | NORTHWOODS COMMUNITY Owosso | 15 | Yes |
| 12 | MEADOWBROOK MH COMMUNITY, LLC Farmington Hills | 14 | Yes |
| 13 | ADDISON Addison | 14 | Yes |
| 14 | ST. LOUIS CENTER Chelsea | 14 | Yes |
| 15 | BATTLE CREEK - VERONA SYSTEM Battle Creek | 13 | Yes |
| 16 | CADGEWITH FARMS Lansing | 13 | Yes |
| 17 | GREEN BROOK ESTATES Fowlerville | 12 | Yes |
| 18 | LINCOLN PINES Gowen | 12 | Yes |
| 19 | BYRON, VILLAGE OF Byron | 11 | Yes |
| 20 | GREAT LAKES WATER AUTHORITY Detroit | 11 | Yes |
| 21 | BARAGA Baraga | 10 | Yes |
| 22 | HERMANSVILLE HOUSING COMM. Hermansville | 10 | Yes |
| 23 | SANDHILL ESTATES Attica | 10 | Yes |
| 24 | COZY OAKS MHP Freeland | 10 | Yes |
| 25 | SHELL CREEK PARK Southfield | 9 | Yes |
| 26 | EMMETT TOWNSHIP Battle Creek | 8 | Yes |
| 27 | LAPEER, CITY OF Lapeer | 8 | Yes |
| 28 | THOMPSONVILLE, VILLAGE OF Thompsonville | 8 | Yes |
| 29 | BLUE WATER VILLAGE WELL SITE, LLC Lansing | 7 | Yes |
| 30 | BUCKLEY, VILLAGE OF Buckley | 7 | Yes |
| 31 | MOUNT CLEMENS, CITY OF Mt Clemens | 7 | Yes |
| 32 | RICHMOND TOWNSHIP Palmer | 7 | Yes |
| 33 | SPRINGFIELD Springfield | 7 | Yes |
| 34 | COUNTRY VILLAGE Belding | 7 | Yes |
| 35 | PINE HAVEN ESTATES MHC Southfield | 7 | Yes |
| 36 | COREWELL HEALTH-BERRIEN CNTR St Joseph | 7 | Yes |
| 37 | MICHIANA ESTATES LLC - WATER SYSTEM Bridgeman | 6 | Yes |
| 38 | COACHLIGHT MHP LLC Farmington Hills | 6 | Yes |
| 39 | BARN SWALLOW APARTMENTS Galesburg | 6 | Yes |
| 40 | BIRMINGHAM Birmingham | 6 | Yes |
| 41 | HILLSDALE Hillsdale | 6 | Yes |
| 42 | MIDLAND CO., WATER DIST. NO. 1 OF Sanford | 6 | Yes |
| 43 | PINCONNING, CITY OF Pinconning | 6 | Yes |
| 44 | SHANTY CREEK - WATARS ASSOCIATION Bellaire | 6 | Yes |
| 45 | SWARTZ CREEK, CITY OF Swartz Creek | 6 | Yes |
| 46 | SUNSET MHP Adrian | 6 | Yes |
| 47 | WEST HICKORY HAVEN Milford | 6 | Yes |
| 48 | SC EDGEWOOD TERRACE PROPERTY, LLC Southfield | 5 | Yes |
| 49 | ADA TOWNSHIP Ada | 5 | Yes |
| 50 | OAK POINTE Brighton | 5 | Yes |
Most Common Contaminants in Michigan
| Contaminant | Violations | Systems Affected |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | 215 | 130 |
| Lead and Copper Rule | 200 | 82 |
| Arsenic | 137 | 19 |
| TTHM | 126 | 20 |
| Revised Total Coliform Rule | 85 | 51 |
| Groundwater Rule | 64 | 33 |
| Total Haloacetic Acids (HAA5) | 58 | 7 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 51 | 32 |
| Combined Radium (-226 and -228) | 46 | 9 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 36 | 3 |
| Nitrate | 27 | 6 |
| CARBON, TOTAL | 26 | 6 |
| Coliform (TCR) | 15 | 9 |
| Interim Enhanced Surface Water Treatment Rule | 10 | 5 |
| Surface Water Treatment Rule | 10 | 3 |
Cities with Water Quality Issues
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in Michigan are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.