Lead pipes by county in Idaho
Lead, galvanized and unknown service lines reported by the water systems serving each Idaho county.
| County | Lead | Galv. | Unknown | Systems |
|---|---|---|---|---|
| Ada County | 2 | 33 | 55,074 | 15 |
| Bannock County | 0 | 0 | 2,283 | 7 |
| Bear Lake County | 2 | 0 | 446 | 5 |
| Benewah County | 0 | 0 | 1,509 | 2 |
| Bingham County | 0 | 1,158 | 3,684 | 6 |
| Blaine County | 0 | 0 | 950 | 7 |
| Boise County | 0 | 0 | 190 | 2 |
| Bonner County | 0 | 0 | 791 | 18 |
| Bonneville County | 0 | 282 | 575 | 9 |
| Boundary County | 0 | 0 | 376 | 9 |
| Butte County | 0 | 0 | 277 | 2 |
| Canyon County | 50 | 29 | 10,600 | 23 |
| Caribou County | 0 | 0 | 8 | 2 |
| Cassia County | 2 | 1 | 199 | 4 |
| Clearwater County | 0 | 0 | 599 | 3 |
| Elmore County | 0 | 0 | 95 | 5 |
| Franklin County | 0 | 0 | 51 | 7 |
| Fremont County | 0 | 0 | 91 | 4 |
| Gem County | 570 | 0 | 0 | 1 |
| Gooding County | 0 | 0 | 0 | 2 |
| Idaho County | 0 | 0 | 92 | 3 |
| Jefferson County | 1 | 387 | 69 | 3 |
| Jerome County | 0 | 136 | 2,409 | 2 |
| Kootenai County | 1 | 0 | 3,444 | 43 |
| Latah County | 0 | 0 | 331 | 6 |
| Lemhi County | 0 | 0 | 0 | 1 |
| Lewis County | 0 | 12 | 582 | 2 |
| Lincoln County | 0 | 0 | 310 | 1 |
| Madison County | 0 | 0 | 69 | 5 |
| Minidoka County | 0 | 0 | 413 | 6 |
| Nez Perce County | 0 | 0 | 4,801 | 3 |
| Oneida County | 0 | 0 | 0 | 1 |
| Owyhee County | 0 | 25 | 532 | 2 |
| Payette County | 0 | 0 | 1,522 | 4 |
| Power County | 0 | 0 | 37 | 3 |
| Shoshone County | 0 | 0 | 0 | 3 |
| Teton County | 1 | 0 | 3 | 2 |
| Twin Falls County | 1 | 0 | 489 | 7 |
| Valley County | 2 | 73 | 2,050 | 4 |
| Washington County | 0 | 0 | 1,457 | 3 |
Systems serving several counties are counted in each. Source: EPA SDWIS service line inventory, 2026 Q3.