South Dakota
483 Utilities
Serving: 757,000
Data available: 2014-2019
Contaminants Found: 36
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 2019 to March 2021 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 |
|---|---|---|---|
| Viewfield Rural Water System | Black Hawk, SD | 150 | 90 |
| Bestgen Water Company | Sturgis, SD | 73 | 20 |
| Aurora | Aurora, SD | 532 | 12 |
| Pelican Plaza | Watertown, SD | 100 | 10 |
| Cottonwood Grove Mobile Home Park | New Underwood, SD | 30 | 10 |
| Marvin | South Shore, SD | 34 | 7 |
| White | White, SD | 485 | 6 |
| Prairie Acres LLC | Piedmont, SD | 325 | 5 |
| Valley Springs | Valley Springs, SD | 759 | 5 |
| Fairburn Water Association | Fairburn, SD | 65 | 5 |
| Wakonda | Wakonda, SD | 321 | 5 |
| Willow Lake | Willow Lake, SD | 285 | 5 |
| Sheridan Lake Highlands | Piedmont, SD | 66 | 5 |
| Henry | Henry, SD | 297 | 5 |
| High Meadows Water Company | Black Hawk, SD | 140 | 5 |
| Dupree | Dupree, SD | 525 | 5 |
| Colome | Colome, SD | 296 | 5 |
| Whispering Willows | Piedmont, SD | 90 | 5 |
| Brookings Municipal Utilities | Brookings, SD | 22,298 | 5 |
| Pillar Peak | City, SD | 24 | 5 |
| Sioux Rural Water System | Watertown, SD | 4,000 | 5 |
| Hutterville Hutterian Brethren | Stratford, SD | 130 | 3 |
| Eden | Eden, SD | 89 | 3 |
| Lesterville | Lesterville, SD | 127 | 3 |
| Greenwood Colony | Delmont, SD | 80 | 3 |
| Ramona | Ramona, SD | 174 | 3 |
| Provo Area Water System | Edgemont, SD | 42 | 2 |
| Country Club Estates | Hot Springs, SD | 83 | 2 |
| Tea | Tea, SD | 4,500 | 2 |
| Howard | Howard, SD | 858 | 2 |
Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 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 |
|---|---|---|---|
| Brookings Municipal Utilities | Brookings, SD | 22,298 | 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) | 309 | 698,755 | 309 | 698,755 | |||
Haloacetic acids (HAA5) | 243 | 657,320 | 243 | 657,320 | |||
Haloacetic acids (HAA9) | 103 | 443,994 | 117 | 486,092 | |||
Chromium (hexavalent) | 83 | 421,267 | 84 | 434,913 | |||
Nitrate | 140 | 397,604 | 148 | 425,029 | |||
Arsenic | 34 | 216,359 | 33 | 212,534 | |||
Radium, combined (-226 & -228) | 174 | 188,576 | 174 | 188,576 | |||
Atrazine | 19 | 29,722 | 19 | 29,722 | |||
Uranium | 22 | 14,352 | 23 | 14,502 | |||
Tetrachloroethylene (perchloroethylene) | 1 | 13,646 | 1 | 13,646 | |||
Perfluorohexane sulfonate (PFHXS) | 1 | 13,646 | 1 | 13,646 | |||
Manganese | 1 | 13,646 | 113 | 489,174 | |||
Trichloroacetic acid | 4 | 2,306 | 2 | 746 | |||
Chloroform | 4 | 2,306 | 2 | 746 | |||
Bromodichloromethane | 4 | 2,306 | 2 | 746 | |||
Dibromochloromethane | 4 | 2,306 | 2 | 746 | |||
Dichloroacetic acid | 4 | 2,306 | 2 | 746 | |||
Bromate | 3 | 2,010 | 1 | 450 | |||
Dibromoacetic acid | 1 | 296 | 1 | 296 | |||
Bromoform | 1 | 296 | 1 | 296 | |||
Thallium | 1 | 200 | 1 | 200 | |||
Contaminants found in South Dakota above legal limits
| Contaminant | # of Utilities | People Served | |
|---|---|---|---|
Nitrate | 1 | 275 | |
Uranium | 2 | 156 | |
Haloacetic acids (HAA5) | 1 | 66 | |
Total trihalomethanes (TTHMs) | 1 | 66 |