South Dakota
477 Utilities
Serving: 757,000
Data available: 2010-2015
Contaminants Found: 22
EWG's drinking water quality report for South Dakota shows results of tests conducted by the water utilities in South Dakota and provided to EWG by the South Dakota Department of Environment & Natural Resources.
Below are utilities in South Dakota serving over 10,000 people, listed alphabetically.
Large utilities in South Dakota
| Utility | Location | People Served |
|---|---|---|
| Aberdeen | Aberdeen, SD | 26,091 |
| Bon Homme-Yankton RWS | Tabor, SD | 10,740 |
| Brookings Municipal Utilities | Brookings, SD | 22,298 |
| Huron | Huron, SD | 12,592 |
| Mid-Dakota Rural Water | Pierre, SD | 10,200 |
| Mitchell | Mitchell, SD | 15,254 |
| Pierre | Pierre, SD | 13,646 |
| Rapid City | Rapid City, SD | 66,481 |
| Sioux Falls | Sioux Falls, SD | 158,800 |
| Spearfish | Spearfish, SD | 10,697 |
| Vermillion | Vermillion, SD | 10,571 |
| Watertown Municipal Utilities | Watertown, SD | 21,482 |
| Web Water Development Association | Aberdeen, SD | 14,000 |
| Yankton | Yankton, SD | 14,700 |
Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in South Dakota
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
| Utility | Location | People Served | Violation Points |
|---|---|---|---|
| Cedar Gulch II | Rapid City, SD | 27 | 96 |
| Shirt Tail Gulch Development | Lead, SD | 60 | 85 |
| Oak Mountain Country Estates | Sturgis, SD | 70 | 80 |
| Viewfield Rural Water System | Black Hawk, SD | 150 | 70 |
| Golden Valley Water Company | Black Hawk, SD | 120 | 35 |
| Spring Creek Acres | Black Hawk, SD | 80 | 35 |
| Owanka Rural Water System | Black Hawk, SD | 52 | 35 |
| Westwood Colony | Britton, SD | 110 | 20 |
| Meadow Crest Homeowners Association | Spearfish, SD | 25 | 15 |
| Provo Area Water System | Edgemont, SD | 42 | 15 |
| Hermosa Water Users Association | Hermosa, SD | 108 | 10 |
| New Effington | New Effington, SD | 256 | 7 |
| Selby | Selby, SD | 642 | 6 |
| Canova | Canova, SD | 105 | 6 |
| Nisland | Nisland, SD | 232 | 6 |
| Ethan | Ethan, SD | 331 | 5 |
| Java | Java, SD | 129 | 5 |
| Chancellor | Chancellor, SD | 264 | 5 |
| Ree Heights | Ree Heights, SD | 79 | 5 |
| Walnut Park | Spearfish, SD | 180 | 5 |
| Dupree | Dupree, SD | 525 | 5 |
| Watertown Municipal Utilities | Watertown, SD | 21,482 | 5 |
| Herreid | Herreid, SD | 438 | 5 |
| Lake Preston | Lake Preston, SD | 599 | 5 |
| Greenwood Colony | Delmont, SD | 80 | 1 |
| Corona | Corona, SD | 109 | 1 |
| White | White, SD | 485 | 1 |
| Belle Fourche | Belle Fourche, SD | 5,594 | 1 |
| Vale Sanitary District | Vale, SD | 120 | 1 |
| Cedar Gulch I | Rapid City, SD | 45 | 1 |
Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in South Dakota
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
| Utility | Location | People Served | Violation Points |
|---|---|---|---|
| Watertown Municipal Utilities | Watertown, SD | 21,482 | 5 |
Contaminants found in South Dakota above health guidelines
| Found above health guidelines | Found | ||||||
|---|---|---|---|---|---|---|---|
| Contaminant | # of Utilities | People Served | # of Utilities | People Served | |||
Total trihalomethanes (TTHMs) | 242 | 656,595 | 242 | 656,595 | |||
Chromium (hexavalent) | 89 | 432,257 | 90 | 445,903 | |||
Radium-226 | 100 | 148,782 | 101 | 148,822 | |||
Radium-228 | 104 | 147,425 | 104 | 147,425 | |||
Uranium | 24 | 19,777 | 24 | 19,777 | |||
Perfluorohexane sulfonate (PFHXS) | 1 | 13,646 | 1 | 13,646 | |||
Arsenic | 8 | 3,930 | 8 | 3,930 | |||
Bromodichloromethane | 3 | 1,213 | 3 | 1,213 | |||
Dibromochloromethane | 2 | 763 | 2 | 763 | |||
Chloroform | 2 | 746 | 3 | 1,213 | |||
Trichloroacetic acid | 2 | 746 | 2 | 746 | |||
Dichloroacetic acid | 2 | 746 | 2 | 746 | |||
Strontium | 1 | 60 | 110 | 476,092 | |||
Contaminants found in South Dakota above legal limits
| Contaminant | # of Utilities | People Served | |
|---|---|---|---|
Total trihalomethanes (TTHMs) | 1 | 3,050 | |
Uranium | 3 | 183 | |
Radium, combined (-226 & -228) | 1 | 75 |