Lead pipes by county in South Dakota
Lead, galvanized and unknown service lines reported by the water systems serving each South Dakota county.
| County | Lead | Galv. | Unknown | Systems |
|---|
| Aurora County | 0 | 4 | 790 | 5 |
| Beadle County | 153 | 0 | 1,725 | 3 |
| Bennett County | 0 | 0 | 0 | 1 |
| Bon Homme County | 23 | 10 | 633 | 6 |
| Brookings County | 48 | 3 | 1,983 | 8 |
| Brown County | 1,128 | 0 | 6,612 | 7 |
| Brule County | 1 | 0 | 1,570 | 4 |
| Buffalo County | 0 | 0 | 0 | 1 |
| Butte County | 4 | 0 | 1,596 | 4 |
| Campbell County | 1 | 0 | 2,730 | 2 |
| Charles Mix County | 29 | 0 | 1,900 | 4 |
| Clark County | 0 | 0 | 1,110 | 3 |
| Clay County | 5 | 63 | 660 | 3 |
| Codington County | 0 | 1 | 4,502 | 6 |
| Corson County | 2 | 0 | 24 | 2 |
| Custer County | 38 | 1 | 148 | 4 |
| Davison County | 241 | 2 | 2,509 | 6 |
| Day County | 1 | 0 | 5,387 | 7 |
| Deuel County | 11 | 6 | 650 | 4 |
| Dewey County | 0 | 0 | 1,176 | 4 |
| Douglas County | 7 | 12 | 343 | 6 |
| Edmunds County | 7 | 7 | 2,862 | 4 |
| Fall River County | 0 | 3 | 2,281 | 5 |
| Faulk County | 2 | 0 | 2,789 | 4 |
| Grant County | 11 | 0 | 1,517 | 3 |
| Gregory County | 0 | 90 | 2,283 | 5 |
| Haakon County | 0 | 0 | 1 | 1 |
| Hamlin County | 2 | 0 | 1,117 | 7 |
| Hand County | 27 | 0 | 1,782 | 3 |
| Hanson County | 6 | 0 | 54 | 4 |
| Harding County | 0 | 0 | 6 | 1 |
| Hughes County | 2 | 0 | 6,883 | 4 |
| Hutchinson County | 55 | 6 | 1,403 | 6 |
| Hyde County | 2 | 0 | 1,715 | 2 |
| Jackson County | 1 | 0 | 10 | 1 |
| Jerauld County | 0 | 0 | 462 | 3 |
| Jones County | 0 | 0 | 571 | 3 |
| Kingsbury County | 24 | 6 | 860 | 3 |
| Lake County | 3 | 2 | 359 | 5 |
| Lawrence County | 7 | 35 | 3,806 | 9 |
| Lincoln County | 1 | 5 | 4,330 | 9 |
| Lyman County | 0 | 0 | 2,024 | 3 |
| Marshall County | 0 | 1 | 4,425 | 6 |
| McCook County | 50 | 2 | 1,090 | 9 |
| McPherson County | 3 | 0 | 2,898 | 3 |
| Meade County | 0 | 23 | 4,813 | 13 |
| Mellette County | 0 | 0 | 1,366 | 1 |
| Miner County | 3 | 0 | 0 | 1 |
| Minnehaha County | 28 | 25 | 20,425 | 10 |
| Moody County | 1 | 3 | 1,450 | 4 |
| Pennington County | 106 | 212 | 3,682 | 23 |
| Perkins County | 0 | 0 | 218 | 2 |
| Potter County | 0 | 0 | 2,924 | 4 |
| Roberts County | 0 | 0 | 1,151 | 5 |
| Sanborn County | 0 | 0 | 498 | 2 |
| Shannon County | 0 | 0 | 41 | 2 |
| Spink County | 32 | 1 | 2,867 | 5 |
| Stanley County | 1 | 0 | 621 | 3 |
| Sully County | 6 | 0 | 1,714 | 2 |
| Todd County | 0 | 0 | 1,366 | 1 |
| Tripp County | 0 | 0 | 3,242 | 3 |
| Turner County | 5 | 0 | 2,972 | 9 |
| Union County | 12 | 2 | 3,395 | 9 |
| Walworth County | 1 | 90 | 2,719 | 2 |
| Yankton County | 0 | 1 | 6,329 | 8 |
| Ziebach County | 0 | 0 | 1,013 | 2 |
Systems serving several counties are counted in each. Source: EPA SDWIS service line inventory, 2026 Q3.