Lead pipes by county in Guam
Lead, galvanized and unknown service lines reported by the water systems serving each Guam county.
| County | Lead | Galv. | Unknown | Systems |
|---|---|---|---|---|
| Guam County | 0 | 0 | 43,610 | 5 |
Systems serving several counties are counted in each. Source: EPA SDWIS service line inventory, 2026 Q3.