Tap Water Quality Report

Tap water quality in TUMON, GU

Served by GWA NORTHERN WATER SYSTEM. 139,207 residents.

Average score 98/100
Utilities 1
Population 139,207
A
98/100
Excellent
ⓘ How did we get this rating?
Quick answer

Tap water in TUMON, GU receives a grade of A (98/100) from TapWaterSafety.org. It's served by GWA NORTHERN WATER SYSTEM. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.

Data sources for this grade: utilities.csv EWG Tap Water Database ⓘ How did we get this rating?

Recommended filters for TUMON

Filters matched to the specific contaminants in TUMON's water supply.

Quality carbon block filter (NSF/ANSI 42 + 53)

$80-$240

A general-purpose carbon block filter handles most baseline water quality concerns.

Clearly Filtered Pitcher Filter
$80-$95 NSF 42, 53, 401, P473
Editorial pick · affiliate link coming soon
Aquasana AQ-5300 Under-Sink Filter
$180-$240 NSF 42, 53, 401
Editorial pick · affiliate link coming soon

Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.

Treatment plant contact info

For service issues, water quality concerns, or to request a Consumer Confidence Report from GWA NORTHERN WATER SYSTEM.

Treatment Plant

FacilityTP FOR WELL A-6

ZIP codes served

TUMON's public water systems serve the following ZIP codes:

96912
96913
96919
96931