Minnesota Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), Minnesota has 998 active community water systems in this extract. PlainEnviro's health-based slice lists 1,033 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 998 community water systems in Minnesota. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | NETT LAKE Nett Lake | 67 | Yes |
| 2 | Winger Winger | 57 | Yes |
| 3 | Starland HB, Inc. Gibbon | 57 | Yes |
| 4 | GRAND PORTAGE Grand Portage | 46 | Yes |
| 5 | Oak Manor Mobile Home Park Lancaster | 46 | Yes |
| 6 | Lake Lillian Lake Lillian | 45 | Yes |
| 7 | River and Woods Mobile Home Park Pelican Rapids | 44 | Yes |
| 8 | Thief River Falls Thief River Falls | 40 | Yes |
| 9 | Climax Climax | 38 | Yes |
| 10 | Elizabeth Fergus Falls | 35 | Yes |
| 11 | Lake Mary Villas Morris | 32 | Yes |
| 12 | Rolling Green First Addition Warsaw | 24 | Yes |
| 13 | Brandy Lake Estates Detroit Lakes | 23 | Yes |
| 14 | Inver Grove Heights Inver Grove Heights | 22 | Yes |
| 15 | Skyline Village Mobile Home Park Inver Grove Heights | 20 | Yes |
| 16 | Shorewood Park Rush City | 19 | Yes |
| 17 | Oak Grove Mobile Home Park Detroit Lakes | 18 | Yes |
| 18 | Thompson Oaks Ellendale | 18 | Yes |
| 19 | ROYALTON TERRACE Victoria | 18 | Yes |
| 20 | Hinckley Hinckley | 16 | Yes |
| 21 | Amboy Amboy | 12 | Yes |
| 22 | Brook Park Brook Park | 11 | Yes |
| 23 | Ely Ely | 11 | Yes |
| 24 | South Saint Paul South St. Paul | 10 | Yes |
| 25 | Glenville Glenville | 10 | Yes |
| 26 | Hayward Hayward | 10 | Yes |
| 27 | Ellsworth Ellsworth | 10 | Yes |
| 28 | Lafayette Lafayette | 9 | Yes |
| 29 | Lewiston Lewiston | 9 | Yes |
| 30 | Lexington Lexington | 8 | Yes |
| 31 | Stacy Stacy | 8 | Yes |
| 32 | Norcross Norcross | 8 | Yes |
| 33 | Stewart Stewart | 8 | Yes |
| 34 | Brookhaven Development Shakopee | 8 | Yes |
| 35 | Winona Winona | 8 | Yes |
| 36 | Twin Lakes Twin Lakes | 7 | Yes |
| 37 | Granada Granada | 7 | Yes |
| 38 | Danube Danube | 6 | Yes |
| 39 | Otsego Otsego | 6 | Yes |
| 40 | Dennison Dennison | 5 | Yes |
| 41 | Elysian Elysian | 5 | Yes |
| 42 | Lyle Lyle | 5 | Yes |
| 43 | Gary Gary | 5 | Yes |
| 44 | Battle Lake Mobile Home Park Henning | 5 | Yes |
| 45 | Savage Savage | 5 | Yes |
| 46 | The Meadows Monticello | 5 | Yes |
| 47 | VERMILION Nett Lake | 4 | Yes |
| 48 | Spring Lake Park Spring Lake Park | 4 | Yes |
| 49 | Rush City Rush City | 4 | Yes |
| 50 | Freeborn Freeborn | 4 | Yes |
Most Common Contaminants in Minnesota
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Arsenic | 405 | 20 |
| Combined Radium (-226 and -228) | 227 | 26 |
| Gross Alpha, Excl. Radon and U | 109 | 22 |
| Interim Enhanced Surface Water Treatment Rule | 80 | 4 |
| Nitrate | 54 | 11 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 28 | 11 |
| Total Haloacetic Acids (HAA5) | 24 | 5 |
| TTHM | 21 | 6 |
| LEAD AND COPPER RULE REVISIONS | 16 | 9 |
| Coliform (TCR) | 16 | 5 |
| Lead and Copper Rule | 15 | 9 |
| Revised Total Coliform Rule | 13 | 9 |
| Groundwater Rule | 13 | 9 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 9 | 1 |
| Coliform (Pre-TCR) | 3 | 1 |
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 Minnesota are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.