COUNTY WATER-SYSTEM LEDGER
Guam, Guam
EPA’s September 2026 export lists 5 active community water systems serving Guam, Guam, with 0 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Guam, Guam
EPA associates 5 covered systems with Guam, Guam; their reported population-served values total 186,886 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Gwa Northern Water SystemGU0000006 | 139,207 | Ground water | No current violation flagged |
| Gwa Central Water SystemGU0000003 | 21,398 | Surface water purchased | No current violation flagged |
| U.S. Navy Water SystemGU0000010 | 12,780 | Surface water | No current violation flagged |
| Andersen Air Force Base Water SystemGU0000009 | 7,700 | Ground water | No current violation flagged |
| Gwa Southern Water SystemGU0000001 | 5,801 | Surface water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Guam, Guam
EPA classifies 5 systems serving Guam, Guam across 3 primary-source categories; Ground water is the largest category with 2 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.