Lead pipes by county in Colorado
Lead, galvanized and unknown service lines reported by the water systems serving each Colorado county.
| County | Lead | Galv. | Unknown | Systems |
|---|
| Adams County | 0 | 1 | 1,939 | 32 |
| Alamosa County | 0 | 0 | 1,862 | 2 |
| Arapahoe County | 2,445 | 464 | 10,195 | 15 |
| Archuleta County | 0 | 0 | 6 | 1 |
| Baca County | 0 | 0 | 338 | 4 |
| Bent County | 15 | 22 | 1,225 | 2 |
| Boulder County | 1 | 30 | 5,367 | 16 |
| Broomfield County | 0 | 0 | 0 | 3 |
| Chaffee County | 0 | 9 | 1,412 | 4 |
| Clear Creek County | 10 | 0 | 61 | 6 |
| Conejos County | 0 | 0 | 399 | 3 |
| Costilla County | 0 | 0 | 955 | 5 |
| Crowley County | 0 | 2 | 578 | 2 |
| Custer County | 0 | 0 | 0 | 1 |
| Delta County | 0 | 3 | 917 | 12 |
| Denver County | 15,826 | 848 | 34,057 | 3 |
| Dolores County | 0 | 0 | 312 | 1 |
| Douglas County | 0 | 0 | 82 | 14 |
| Eagle County | 0 | 0 | 189 | 9 |
| El Paso County | 0 | 69 | 1,628 | 29 |
| Elbert County | 0 | 0 | 0 | 3 |
| Fremont County | 0 | 77 | 3,495 | 4 |
| Garfield County | 0 | 65 | 1,285 | 14 |
| Gilpin County | 0 | 2 | 178 | 2 |
| Grand County | 0 | 0 | 191 | 10 |
| Gunnison County | 0 | 0 | 702 | 5 |
| Huerfano County | 0 | 0 | 74 | 4 |
| Jefferson County | 2 | 45 | 2,103 | 27 |
| Kiowa County | 0 | 0 | 422 | 1 |
| Kit Carson County | 0 | 39 | 1,472 | 4 |
| La Plata County | 0 | 7 | 403 | 10 |
| Lake County | 1 | 50 | 481 | 1 |
| Larimer County | 21 | 87 | 6,455 | 17 |
| Las Animas County | 0 | 0 | 506 | 3 |
| Lincoln County | 27 | 8 | 133 | 4 |
| Logan County | 164 | 6 | 0 | 2 |
| Mesa County | 189 | 176 | 601 | 4 |
| Mineral County | 0 | 0 | 8 | 2 |
| Moffat County | 0 | 0 | 1,014 | 1 |
| Montezuma County | 0 | 108 | 1,195 | 5 |
| Montrose County | 0 | 7 | 159 | 8 |
| Morgan County | 10 | 13 | 2,636 | 5 |
| Otero County | 0 | 4 | 3,712 | 6 |
| Ouray County | 0 | 6 | 422 | 4 |
| Park County | 0 | 0 | 107 | 1 |
| Phillips County | 0 | 15 | 0 | 1 |
| Pitkin County | 0 | 4 | 130 | 3 |
| Prowers County | 2 | 15 | 3,708 | 4 |
| Pueblo County | 67 | 111 | 22,738 | 7 |
| Rio Blanco County | 0 | 0 | 90 | 2 |
| Rio Grande County | 0 | 0 | 2,031 | 3 |
| Routt County | 1 | 0 | 446 | 5 |
| Saguache County | 0 | 0 | 868 | 3 |
| San Juan County | 0 | 3 | 325 | 1 |
| San Miguel County | 0 | 0 | 18 | 4 |
| Sedgwick County | 0 | 0 | 0 | 1 |
| Summit County | 0 | 0 | 0 | 9 |
| Teller County | 0 | 7 | 1,624 | 5 |
| Washington County | 0 | 0 | 0 | 1 |
| Weld County | 10 | 281 | 17,444 | 28 |
| Yuma County | 1 | 34 | 2,283 | 3 |
Systems serving several counties are counted in each. Source: EPA SDWIS service line inventory, 2026 Q3.