STATE / TERRITORY LEDGER
Guam drinking water system records
EPA’s September 2026 export lists 5 active community water systems in Guam, with 0 current-violation flags and 0 serious-violator flags among covered systems serving at least 2,500 people.
Source: EPA SDWIS system-search export · Active community systems · Snapshot 13 Sep 2026
01 / LARGEST SYSTEMS
Guam community water systems
EPA’s covered Guam records include 5 active community systems reporting a combined population-served total of 186,886, which may overlap.
Population served is a system-reported service figure. It is not a count of unique state residents.
| 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 / CITY REPORTS
Guam city water-system reports
Guam has 24 city reports meeting the publication threshold for covered systems or reported population served.
03 / COUNTY REPORTS
Guam county water-system reports
Guam has 1 county reports meeting the publication threshold for covered systems or reported population served.