South Dakota
483 Utilities
Serving: 757,000
Data available: 2012-2017
Contaminants Found: 27
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 April 2016 to March 2019 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 | 95 |
| Owanka Rural Water System | Black Hawk, SD | 52 | 65 |
| Springfield | Springfield, SD | 1,989 | 46 |
| Meadow Crest Homeowners Association | Spearfish, SD | 25 | 45 |
| Letcher | Letcher, SD | 190 | 24 |
| Dry Creek Estates | Piedmont, SD | 105 | 23 |
| Bon Homme-Yankton RWS | Tabor, SD | 10,740 | 22 |
| Rosholt | Rosholt, SD | 408 | 20 |
| Southbrook Estates | Brookings, SD | 75 | 20 |
| Reynolds Court | Spearfish, SD | 28 | 20 |
| Maxwell Colony | Scotland, SD | 200 | 20 |
| Greenwood Colony | Delmont, SD | 80 | 20 |
| Nisland | Nisland, SD | 232 | 17 |
| Canova | Canova, SD | 105 | 17 |
| Midland | Midland, SD | 120 | 15 |
| Wagner | Wagner, SD | 1,566 | 15 |
| Keystone | Keystone, SD | 370 | 15 |
| Sheridan Lake Highlands | Piedmont, SD | 66 | 15 |
| Nunda | Nunda, SD | 43 | 15 |
| Ponderosa Mobile Home Ranch | Rapid City, SD | 75 | 14 |
| New Effington | New Effington, SD | 256 | 14 |
| Newport Colony | Claremont, SD | 116 | 14 |
| Utica | Utica, SD | 65 | 13 |
| Summit | Summit, SD | 288 | 13 |
| Pine Lake Hills | Sioux Falls, SD | 320 | 12 |
| Sacora Mobile Home Park | Piedmont, SD | 42 | 12 |
| Oldham | Oldham, SD | 133 | 12 |
| Fall River Wud-south | Oral, SD | 648 | 12 |
| Oelrichs | Oelrichs, SD | 126 | 12 |
| Bison | Bison, SD | 333 | 11 |
Large utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 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 |
|---|---|---|---|
| Bon Homme-Yankton RWS | Tabor, SD | 10,740 | 22 |
| 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) | 291 | 703,488 | 291 | 703,488 | |||
Haloacetic acids (HAA5) | 236 | 574,190 | 236 | 574,190 | |||
Nitrate | 234 | 458,536 | 251 | 510,425 | |||
Chromium (hexavalent) | 83 | 421,267 | 84 | 434,913 | |||
Arsenic | 37 | 200,923 | 36 | 197,098 | |||
Radium, combined (-226 & -228) | 184 | 200,430 | 186 | 200,851 | |||
Uranium | 26 | 19,414 | 28 | 19,500 | |||
Perfluorohexane sulfonate (PFHXS) | 1 | 13,646 | 1 | 13,646 | |||
Dichloroacetic acid | 5 | 2,773 | 3 | 1,213 | |||
Trichloroacetic acid | 5 | 2,773 | 3 | 1,213 | |||
Chloroform | 5 | 2,773 | 3 | 1,213 | |||
Bromodichloromethane | 5 | 2,773 | 3 | 1,213 | |||
Di(2-ethylhexyl) phthalate | 1 | 2,067 | 2 | 2,534 | |||
Dibromochloromethane | 2 | 763 | 2 | 763 | |||
Dibromoacetic acid | 2 | 763 | 2 | 763 | |||
Bromoform | 2 | 763 | 2 | 763 | |||
Thallium | 1 | 200 | 1 | 200 | |||
Strontium | 1 | 60 | 104 | 465,102 | |||
Contaminants found in South Dakota above legal limits
| Contaminant | # of Utilities | People Served | |
|---|---|---|---|
Nitrate | 1 | 275 | |
Uranium | 2 | 156 | |
Radium, combined (-226 & -228) | 2 | 87 |