GU Water Quality Ratings

TapWaterSafety has rated 1 public water systems in GU, serving a combined 139,207 residents. The statewide average grade is A.

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
State average grade
A
98/100
Total utilities rated 1
Population served 139,207

Cities in GU

Browse tap water quality reports by city. Click any city to see its grade, what's in the water, and recommended filters.

ADACAO
A 139,207
ADELUP
A 139,207
AGANA HEIGHTS
A 139,207
ANIGUA
A 139,207
ASAN
A 139,207
DEDEDO
A 139,207
PIGO
A 139,207
TALOFOFO
A 139,207
TAMUNING
A 139,207
TUMON
A 139,207

Grade distribution

A
1 (100%)
B
0 (0%)
C
0 (0%)
D
0 (0%)
F
0 (0%)

All rated utilities in GU

Sorted by score, highest first. Click any utility to see the full grade card.

Rank Utility City Population Score Grade
#1 GWA NORTHERN WATER SYSTEM TALOFOFO 139,207 98 A