Minnesota Water Quality
Health violation data for 993 community water systems in Minnesota. Based on EPA Safe Drinking Water Information System (SDWIS) data.
Water Systems
993
Total Violations
845
Systems with Violations
50
Cities with Issues
104
Water Systems with Most Violations
| # | Water System | Violations | Health |
|---|---|---|---|
| 1 | Winger Winger | 57 | Yes |
| 2 | Starland HB, Inc. Gibbon | 56 | Yes |
| 3 | NETT LAKE Nett Lake | 44 | Yes |
| 4 | GRAND PORTAGE Grand Portage | 43 | Yes |
| 5 | Thief River Falls Thief River Falls | 40 | Yes |
| 6 | Lake Lillian Lake Lillian | 38 | Yes |
| 7 | Climax Climax | 38 | Yes |
| 8 | Oak Manor Mobile Home Park Lancaster | 38 | Yes |
| 9 | River and Woods Mobile Home Park Pelican Rapids | 37 | Yes |
| 10 | Elizabeth Fergus Falls | 34 | Yes |
| 11 | Lake Mary Villas Morris | 28 | Yes |
| 12 | Brandy Lake Estates Detroit Lakes | 23 | Yes |
| 13 | ROYALTON TERRACE Victoria | 18 | Yes |
| 14 | Oak Grove Mobile Home Park Detroit Lakes | 17 | Yes |
| 15 | Hinckley Hinckley | 16 | Yes |
| 16 | Rolling Green First Addition Warsaw | 16 | Yes |
| 17 | Thompson Oaks Ellendale | 12 | Yes |
| 18 | South Saint Paul South St. Paul | 10 | Yes |
| 19 | Ely Ely | 10 | Yes |
| 20 | Ellsworth Ellsworth | 9 | Yes |
| 21 | Stacy Stacy | 8 | Yes |
| 22 | Norcross Norcross | 8 | Yes |
| 23 | Brook Park Brook Park | 8 | Yes |
| 24 | Brookhaven Development Shakopee | 8 | Yes |
| 25 | Winona Winona | 8 | Yes |
| 26 | Shorewood Park Rush City | 7 | Yes |
| 27 | Lafayette Lafayette | 7 | Yes |
| 28 | Stewart Stewart | 6 | Yes |
| 29 | Danube Danube | 6 | Yes |
| 30 | Lewiston Lewiston | 6 | Yes |
| 31 | Otsego Otsego | 6 | Yes |
| 32 | REDBY/RED LAKE Red Lake | 5 | Yes |
| 33 | PONEMAH Red Lake | 5 | Yes |
| 34 | Inver Grove Heights Inver Grove Heights | 5 | Yes |
| 35 | Twin Lakes Twin Lakes | 5 | Yes |
| 36 | Gary Gary | 5 | Yes |
| 37 | Battle Lake Mobile Home Park Henning | 5 | Yes |
| 38 | Spring Lake Park Spring Lake Park | 4 | Yes |
| 39 | Rush City Rush City | 4 | Yes |
| 40 | Skyline Village Mobile Home Park Inver Grove Heights | 4 | Yes |
| 41 | Freeborn Freeborn | 4 | Yes |
| 42 | Cosmos Cosmos | 4 | Yes |
| 43 | Bowlus Bowlus | 4 | Yes |
| 44 | Lyle Lyle | 4 | Yes |
| 45 | Biwabik Biwabik | 4 | Yes |
| 46 | Tower Tower | 4 | Yes |
| 47 | Savage Savage | 4 | Yes |
| 48 | Elko New Market Elko-new Market | 4 | Yes |
| 49 | Tintah Tintah | 4 | Yes |
| 50 | INGER Cass Lake | 3 | Yes |
Most Common Contaminants in Minnesota
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Barium | 375 | 19 |
| Lead & Copper Rule | 143 | 26 |
| Turbidity | 80 | 4 |
| Copper | 60 | 18 |
| Nitrate | 49 | 11 |
| Chlorine | 27 | 11 |
| Fluoride | 20 | 8 |
| Haloacetic Acids (HAA5) | 19 | 5 |
| Total Trihalomethanes (TTHM) | 17 | 6 |
| Total Coliform (RTCR) | 15 | 5 |
| Combined Radium 226/228 | 13 | 8 |
| E. coli | 12 | 9 |
| Gross Alpha | 9 | 8 |
| Atrazine | 6 | 1 |
Cities with Water Quality Issues
Hastings Medford Rush City Inver Grove Heights Stacy Monticello Savage Shakopee Winthrop Minneapolis Biwabik Duluth Lewiston Winona Mankato Fairmont Dunnell Pipestone Morris Albany Avon Detroit Lakes Fergus Falls Henning Thief River Falls Isle Grand Portage Cass Lake Nett Lake Red Lake White Earth Excelsior Victoria Palisade Ham Lake Lexington Spring Lake Park Puposky Amboy Moose Lake +64 more
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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 Minnesota are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.