Is Marine Corps Base Hawaii Tap Water Safe? Quality Report

Water source: GWP
Ownership: Federal government
Counties served: Honolulu

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2014-12-01 → 2014-12-31
MCL	Health-based	Resolved	2014-12-01 → 2014-12-31
MCL	Health-based	Resolved	2014-12-01 → 2014-12-31
MR	Monitoring	Resolved	2022-10-01
MR	Monitoring	Resolved	2022-10-01
MR	Monitoring	Resolved	2022-10-01
MR	Monitoring	Resolved	2022-01-01
MR	Monitoring	Resolved	2022-01-01
MR	Monitoring	Resolved	2022-01-01
Other	Monitoring	Resolved	2021-07-01

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
TTHM	5.63 µg/L 7% of the EPA limit 80 µg/L worst single sample: 7.1 µg/L	55/56	SYR4	2012–2019
Bromoform	5.46 µg/L No EPA limit set worst single sample: 7.1 µg/L	35/36	SYR4	2013–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	10/10	LCR	2021
Copper	1040.8 µg/L 80% of the EPA limit 1300 µg/L worst single sample: 1298 µg/L	9/92	SYR4	2012–2018
Lead	99.148 µg/L 661% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 126.4 µg/L	9/92	SYR4	2012–2018
Dibromochloromethane	0.9650 µg/L No EPA limit set worst single sample: 1 µg/L	8/36	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	1.19 µg/L 2% of the EPA limit 60 µg/L worst single sample: 1.2 µg/L	3/56	SYR4	2012–2019
Dibromoacetic Acid	1.1 µg/L No EPA limit set	2/36	SYR4	2013–2019
Trichloroacetic Acid	1.2 µg/L No EPA limit set	1/36	SYR4	2013–2019

35 contaminants tested, none detected

11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromodichloromethaneChloroformDichloroacetic AcidHfpo-DaMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact: YAMAMOTO, LEE
Phone: 808-257-0800

Frequently asked questions about Marine Corps Base Hawaii

Is Marine Corps Base Hawaii tap water safe to drink?

EPA monitoring detected 9 contaminants in Marine Corps Base Hawaii's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Marine Corps Base Hawaii's water?

EPA monitoring detected TTHM, Bromoform, Lead, Copper, Lead, and others. The full list with the level and data source for each is above.

How many people does Marine Corps Base Hawaii serve?

Marine Corps Base Hawaii reports serving 16,300 people in Hawaii, per its EPA record.

Has Marine Corps Base Hawaii had any water quality violations?

The EPA has 16 violations on file for Marine Corps Base Hawaii, of which 3 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.