Largest water suppliers
Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the
EPA action level. “—” means no lead sample is on file for that supplier.
| Supplier | City | Population | Lead (p90) |
|---|---|---|---|
| Sioux Falls | Sioux Falls | 216,462 | 0.0030 mg/L |
| Rapid City | Rapid City | 72,009 | 0.0060 mg/L |
| Aberdeen | Aberdeen | 27,989 | 0.0030 mg/L |
| Brookings Municipal Utilities | Brookings | 23,377 | 0.0080 mg/L |
| Watertown Municipal Utilities | Watertown | 23,230 | 0.0020 mg/L |
| Web Water Development Association | Aberdeen | 20,750 | 0.0020 mg/L |
| Mitchell | Mitchell | 15,651 | 0.0010 mg/L |
| Yankton | Yankton | 15,411 | 0.0000 mg/L |
| Huron | Huron | 14,263 | 0.0060 mg/L |
| Pierre | Pierre | 14,091 | 0.0010 mg/L |
| Box Elder | Box Elder | 14,000 | 0.0020 mg/L |
| Spearfish | Spearfish | 13,803 | 0.0030 mg/L |
| Minnehaha Community Water Corp | Dell Rapids | 13,435 | 0.0010 mg/L |
| By Water District | Avon | 13,320 | 0.0010 mg/L |
| Mid-Dakota Rural Water | Miller | 11,833 | 0.0020 mg/L |
| Vermillion | Vermillion | 11,695 | 0.0010 mg/L |
| Rapid Valley Sanitary District | Rapid City | 11,408 | 0.0030 mg/L |
| Brandon | Brandon | 11,048 | 0.0010 mg/L |
| Harrisburg | Harrisburg | 10,297 | 0.0010 mg/L |
| Ellsworth Afb | Ellsworth Afb | 9,100 | 0.0010 mg/L |
| Pine Ridge Water System | Pine Ridge | 7,482 | 0.0000 mg/L |
| Tea | Tea | 7,381 | 0.0010 mg/L |
| Sturgis | Sturgis | 7,020 | 0.0020 mg/L |
| Kyle Water System | Pine Ridge | 6,526 | 0.0015 mg/L |
| Kingbrook I Rural Water System | Arlington | 6,455 | 0.0020 mg/L |
| Randall Community Water District | Lake Andes | 6,248 | 0.0040 mg/L |
| Brookings-Deuel Rural Water System | Clear Lake | 6,200 | 0.0130 mg/L |
| Madison | Madison | 6,191 | 0.0020 mg/L |
| Lincoln County Rural Water System | Sioux Falls | 5,965 | 0.0020 mg/L |
| Big Sioux Community Water System | Egan | 5,800 | 0.0010 mg/L |
| Brown-Day-Marshall Rws | Britton | 5,673 | 0.0020 mg/L |
| Belle Fourche | Belle Fourche | 5,617 | 0.0030 mg/L |
| Sicangu Mni Wiconi Rural Water System | Rosebud | 5,610 | 0.0011 mg/L |
| Rosebud Rural Water System | Rosebud | 5,500 | 0.0003 mg/L |
| South Lincoln Rural Water System | Beresford | 5,250 | 0.0010 mg/L |
| Grant-Roberts Rural Water System | Milbank | 5,050 | 0.0030 mg/L |
| Tripp County Water User District | Hamill | 4,860 | 0.0020 mg/L |
| Clay Rural Water System | Wakonda | 4,780 | 0.0010 mg/L |
| Wr/Lj - Mni Wiconi | Murdo | 4,720 | 0.0030 mg/L |
| Black Hawk Water User District | Black Hawk | 4,500 | 0.0020 mg/L |
| Sioux Rural Water System | Goodwin | 4,280 | 0.0040 mg/L |
| Tm Rural Water District | Parker | 4,250 | 0.0010 mg/L |
| Eagle Butte | Eagle Butte | 4,000 | 0.0000 mg/L |
| Dakota Dunes Cid | Dakota Dunes | 3,700 | 0.0040 mg/L |
| Dell Rapids | Dell Rapids | 3,633 | 0.0020 mg/L |
| Oglala Rws Pipeline | Pine Ridge | 3,562 | 0.0000 mg/L |
| Milbank | Milbank | 3,544 | 0.0020 mg/L |
| Davison Rural Water System Inc | Mitchell | 3,485 | 0.0010 mg/L |
| Hartford | Hartford | 3,396 | 0.0010 mg/L |
| Hot Springs | Hot Springs | 3,395 | 0.0030 mg/L |
| Mobridge | Mobridge | 3,261 | 0.0010 mg/L |
| Canton | Canton | 3,066 | 0.0030 mg/L |
| North Sioux City | North Sioux City | 3,042 | 0.0040 mg/L |
| Lead | Lead | 2,982 | 0.0010 mg/L |
| Winner | Winner | 2,921 | 0.0030 mg/L |
| Kingbrook Iii Rural Water System | Arlington | 2,888 | 0.0030 mg/L |
| Aurora-Brule Rural Water System | Kimball | 2,750 | 0.0040 mg/L |
| Kingbrook Ii Rural Water System | Arlington | 2,715 | 0.0020 mg/L |
| Hanson Rural Water System | Emery | 2,685 | 0.0000 mg/L |
| Lennox | Lennox | 2,571 | 0.0010 mg/L |
| Wr/Lj - North Stanley County | Murdo | 2,492 | 0.0010 mg/L |
| Sisseton | Sisseton | 2,479 | 0.0050 mg/L |
| Chamberlain | Chamberlain | 2,473 | 0.0010 mg/L |
| St. Francis | Rosebud | 2,450 | 0.0002 mg/L |
| Flandreau | Flandreau | 2,372 | 0.0010 mg/L |
| Beresford | Beresford | 2,359 | 0.0040 mg/L |
| Volga | Volga | 2,340 | 0.0020 mg/L |
| Clark Rural Water System | Clark | 2,325 | 0.0000 mg/L |
| Fort Pierre | Fort Pierre | 2,236 | 0.0010 mg/L |
| Redfield | Redfield | 2,214 | 0.0060 mg/L |
| Tri-County Rural Water System | Eagle Butte | 2,190 | 0.0040 mg/L |
| Wanblee East | Pine Ridge | 2,179 | 0.0028 mg/L |
| Elk Point | Elk Point | 2,124 | 0.0020 mg/L |
| Springfield | Springfield | 2,108 | 0.0010 mg/L |
| Custer | Custer | 1,919 | 0.0020 mg/L |
| Webster | Webster | 1,728 | 0.0030 mg/L |
| White Horse Creek Water System | Pine Ridge | 1,690 | 0.0000 mg/L |
| Lower Brule Rural Water Supply System | Lower Brule | 1,637 | 0.0006 mg/L |
| Parkston | Parkston | 1,567 | 0.0030 mg/L |
| Martin | Martin | 1,500 | 0.0020 mg/L |
| Mission Water System | Mission | 1,500 | 0.0006 mg/L |
| Wagner | Wagner | 1,490 | 0.0010 mg/L |
| Butte-Meade Swd-Bean Well | Newell | 1,481 | 0.0010 mg/L |
| Wolf Creek School | Batesland | 1,450 | — |
| Clay Rws/South Union | Wakonda | 1,447 | 0.0010 mg/L |
| Groton | Groton | 1,380 | 0.0030 mg/L |
| Crooks | Crooks | 1,362 | 0.0010 mg/L |
| Fort Thompson Water System | Fort Thompson | 1,357 | 0.0007 mg/L |
| Miller | Miller | 1,349 | 0.0050 mg/L |
| Freeman | Freeman | 1,329 | 0.0010 mg/L |
| Salem | Salem | 1,325 | 0.0030 mg/L |
| Baltic | Baltic | 1,271 | 0.0010 mg/L |
| Platte | Platte | 1,256 | 0.0140 mg/L |
| Lakota Tech High School | Batesland | 1,250 | 0.0010 mg/L |
| Garretson | Garretson | 1,228 | 0.0010 mg/L |
| Gregory | Gregory | 1,221 | 0.0030 mg/L |
| Clear Lake | Clear Lake | 1,218 | 0.0080 mg/L |
| Britton | Britton | 1,215 | 0.0020 mg/L |
| Chapel Lane Water Company | Rapid City | 1,200 | 0.0020 mg/L |
| Aurora | Aurora | 1,200 | 0.0020 mg/L |