South Dakota Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), South Dakota has 513 active community water systems in this extract. PlainEnviro's health-based slice lists 1,217 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 513 community water systems in South Dakota. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | SHIRT TAIL GULCH DEVELOPMENT Black Hawk | 187 | Yes |
| 2 | CEDAR GULCH 2 Piedmont | 57 | Yes |
| 3 | OAK MOUNTAIN COUNTRY ESTATES Black Hawk | 41 | Yes |
| 4 | MEADOW CREST SANITARY DISTRICT Spearfish | 32 | Yes |
| 5 | VIEWFIELD RURAL WATER SYSTEM Black Hawk | 32 | Yes |
| 6 | GOLDEN VALLEY WATER COMPANY Black Hawk | 21 | Yes |
| 7 | OWANKA RURAL WATER SYSTEM Black Hawk | 20 | Yes |
| 8 | BOX ELDER Box Elder | 19 | Yes |
| 9 | ABERDEEN Aberdeen | 17 | Yes |
| 10 | NORTH MARTIN WATER SYSTEM Pine Ridge | 15 | Yes |
| 11 | GARDEN CITY Garden City | 15 | Yes |
| 12 | BUFFALO GAP Buffalo Gap | 13 | Yes |
| 13 | SUMMIT Summit | 13 | Yes |
| 14 | ROSHOLT Rosholt | 12 | Yes |
| 15 | PROVO AREA WATER SYSTEM Edgemont | 12 | Yes |
| 16 | YANKTON Yankton | 12 | Yes |
| 17 | MASKELL, VILLAGE OF Vermillion | 10 | Yes |
| 18 | WALNUT PARK Spearfish | 10 | Yes |
| 19 | PINE HILLS PARK Summerset | 9 | Yes |
| 20 | REYNOLDS COURT Spearfish | 9 | Yes |
| 21 | MORRISTOWN Morristown | 9 | Yes |
| 22 | WAGNER Wagner | 9 | Yes |
| 23 | HORSESHOE ACRES WATER ASSOCIATION Piedmont | 9 | Yes |
| 24 | DUPREE Dupree | 8 | Yes |
| 25 | SPRINGFIELD Springfield | 8 | Yes |
| 26 | SOUTH SHORE South Shore | 8 | Yes |
| 27 | EDGEMONT Edgemont | 7 | Yes |
| 28 | LAKE ANDES Lake Andes | 7 | Yes |
| 29 | MONTROSE Montrose | 7 | Yes |
| 30 | SELBY Selby | 7 | Yes |
| 31 | WILLOW LAKE Willow Lake | 7 | Yes |
| 32 | WORTHING Worthing | 7 | Yes |
| 33 | TIMBERLAND PARK Yankton | 7 | Yes |
| 34 | SHERIDAN LAKE HIGHLANDS, INC. Piedmont | 7 | Yes |
| 35 | PRAIRIE HAVEN SUBDIVISION Black Hawk | 7 | Yes |
| 36 | BRISTOL Bristol | 6 | Yes |
| 37 | COLOME Colome | 6 | Yes |
| 38 | CORSICA Corsica | 6 | Yes |
| 39 | KIMBALL Kimball | 6 | Yes |
| 40 | NISLAND Nisland | 6 | Yes |
| 41 | PARKSTON Parkston | 6 | Yes |
| 42 | UTICA Gayville | 6 | Yes |
| 43 | BICENTENNIAL TRAILER COURT Spearfish | 6 | Yes |
| 44 | WANBLEE EAST Pine Ridge | 5 | Yes |
| 45 | CANOVA Canova | 5 | Yes |
| 46 | CONDE Conde | 5 | Yes |
| 47 | FLANDREAU Flandreau | 5 | Yes |
| 48 | HUMBOLDT Humboldt | 5 | Yes |
| 49 | MARVIN South Shore | 5 | Yes |
| 50 | TULARE Miller | 5 | Yes |
Most Common Contaminants in South Dakota
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 541 | 209 |
| Combined Radium (-226 and -228) | 239 | 10 |
| Gross Alpha, Excl. Radon and U | 184 | 9 |
| Groundwater Rule | 87 | 47 |
| Revised Total Coliform Rule | 28 | 15 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 26 | 15 |
| Interim Enhanced Surface Water Treatment Rule | 25 | 3 |
| TTHM | 23 | 7 |
| Arsenic | 21 | 3 |
| LEAD AND COPPER RULE REVISIONS | 10 | 10 |
| Nitrite | 9 | 1 |
| Selenium | 8 | 1 |
| Coliform (TCR) | 5 | 4 |
| Lead and Copper Rule | 3 | 2 |
| Coliform (Pre-TCR) | 2 | 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 South Dakota are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.