Tap water in Tumon, GU — ZIP 96929
3 public water systems serving about 159,687 people. PFAS "forever chemicals" have been detected here.
D
Poor
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5
testing. Levels and the 2024 federal limits are shown per system below.
Water systems serving 96929
Gwa Northern Water System
PWSID GU0000006 · serves 139,207 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 148.2 ppt — above federal limit
U.s. Navy Water System
PWSID GU0000010 · serves 12,780 ·
surface water
2 health-based / 2 total violations (5 yrs)
· PFAS up to 3.4 ppt
Andersen Air Force Base Water System
PWSID GU0000009 · serves 7,700 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 4.9 ppt
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology