Tap water in Mangilao, GU — ZIP 96915
4 public water systems serving about 166,616 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 96915
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
Gwa Central Water System
PWSID GU0000003 · serves 8,828 ·
surface water
1 health-based / 1 total violations (5 yrs)
Gwa Southern Water System
PWSID GU0000001 · serves 5,801 ·
surface water
0 health-based / 0 total violations (5 yrs)
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology