Lead pipes by county in Arizona
Lead, galvanized and unknown service lines reported by the water systems serving each Arizona county.
| County | Lead | Galv. | Unknown | Systems |
|---|---|---|---|---|
| Apache County | 0 | 0 | 3,684 | 16 |
| Cochise County | 1 | 196 | 27,368 | 41 |
| Coconino County | 0 | 1,332 | 20,537 | 28 |
| Gila County | 0 | 0 | 9,375 | 32 |
| Graham County | 0 | 0 | 5,446 | 3 |
| Greenlee County | 0 | 0 | 2,451 | 7 |
| La Paz County | 0 | 229 | 1,133 | 9 |
| Maricopa County | 0 | 639 | 316,781 | 74 |
| Mohave County | 0 | 0 | 38,685 | 41 |
| Navajo County | 0 | 1 | 15,568 | 33 |
| Pima County | 0 | 386 | 157,927 | 80 |
| Pinal County | 0 | 4 | 33,701 | 40 |
| Santa Cruz County | 0 | 0 | 2,939 | 11 |
| Yavapai County | 0 | 0 | 44,537 | 52 |
| Yuma County | 5 | 0 | 17,875 | 25 |
Systems serving several counties are counted in each. Source: EPA SDWIS service line inventory, 2026 Q3.