Is North Kona Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Hawaii

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
MR	Monitoring	Unaddressed	2022-10-01
MR	Monitoring	Unaddressed	2022-10-01

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
Nitrate	1200 µg/L 12% of the EPA limit 10000 µg/L	150/150	SYR4	2012–2019
Nitrate-Nitrite	1200 µg/L 12% of the EPA limit 10000 µg/L	75/75	SYR4	2012–2019
Fluoride	474.5 µg/L 12% of the EPA limit 4000 µg/L worst single sample: 690 µg/L	72/75	SYR4	2012–2019
Copper	169.1 µg/L 13% of the EPA limit 1300 µg/L worst single sample: 392 µg/L	27/301	SYR4	2012–2019
TTHM	9.43 µg/L 12% of the EPA limit 80 µg/L worst single sample: 10.7 µg/L	23/23	SYR4	2012–2019
Chromium	3.081 µg/L 3.1% of the EPA limit 100 µg/L worst single sample: 3.29 µg/L	20/23	SYR4	2012–2019
Dibromochloromethane	2.755 µg/L No EPA limit set worst single sample: 3.8 µg/L	20/23	SYR4	2012–2019
Bromodichloromethane	1.8 µg/L No EPA limit set	18/23	SYR4	2012–2019
Bromoform	5.825 µg/L No EPA limit set worst single sample: 10.7 µg/L	16/23	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	15/15	LCR	2021
Gross Beta Particle Activity	11.9 pCi/L No EPA limit set worst single sample: 13 pCi/L	12/19	SYR4	2012–2019
Barium	13.228 µg/L 0.7% of the EPA limit 2000 µg/L worst single sample: 14.35 µg/L	7/23	SYR4	2012–2019
Lead	16.695 µg/L 111% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 18 µg/L	4/301	SYR4	2012–2019
Combined Uranium	2.48 µg/L 8.3% of the EPA limit 30 µg/L worst single sample: 2.5 µg/L	3/19	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	0.2270 pCi/L 1.5% of the EPA limit 15 pCi/L worst single sample: 0.2300 pCi/L	3/17	SYR4	2012–2019
Xylenes, Total	0.7130 µg/L 0% of the EPA limit 10000 µg/L worst single sample: 0.7300 µg/L	3/34	SYR4	2012–2019
Chloroform	1.072 µg/L No EPA limit set worst single sample: 1.1 µg/L	2/23	SYR4	2012–2019
Arsenic	1.1 µg/L 11% of the EPA limit 10 µg/L	1/23	SYR4	2012–2019

96 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: OKAMOTO, KEITH K.
Phone: 808-961-8050

Frequently asked questions about North Kona

Is North Kona tap water safe to drink?

EPA monitoring detected 18 contaminants in North Kona'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 North Kona's water?

EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, TTHM, and others. The full list with the level and data source for each is above.

How many people does North Kona serve?

North Kona reports serving 29,581 people in Hawaii, per its EPA record.

Has North Kona had any water quality violations?

The EPA has 2 violations on file for North Kona, of which 0 are health-based (a contaminant limit or required treatment was breached) and 2 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.