Is Ookala (Dws) Tap Water Safe? Quality Report

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

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

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	470 µg/L 4.7% of the EPA limit 10000 µg/L	16/16	SYR4	2012–2019
Atrazine	0.4570 µg/L 15% of the EPA limit 3 µg/L worst single sample: 0.4900 µg/L	12/12	SYR4	2012–2019
Nitrate-Nitrite	470 µg/L 4.7% of the EPA limit 10000 µg/L	8/8	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	5/5	LCR	2021
Bromoform	4.07 µg/L No EPA limit set worst single sample: 4.2 µg/L	3/3	SYR4	2013–2019
Dibromochloromethane	4.37 µg/L No EPA limit set worst single sample: 4.5 µg/L	3/3	SYR4	2013–2019
TTHM	10.5 µg/L 13% of the EPA limit 80 µg/L worst single sample: 10.8 µg/L	3/3	SYR4	2013–2019
Bromodichloromethane	2.08 µg/L No EPA limit set worst single sample: 2.1 µg/L	2/3	SYR4	2013–2019
Dibromoacetic Acid	1.5 µg/L No EPA limit set	1/3	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	1.5 µg/L 2.5% of the EPA limit 60 µg/L	1/3	SYR4	2013–2019

72 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalArsenicBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

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

Frequently asked questions about Ookala (Dws)

Is Ookala (Dws) tap water safe to drink?

EPA monitoring detected 10 contaminants in Ookala (Dws)'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 Ookala (Dws)'s water?

EPA monitoring detected Nitrate, Atrazine, Nitrate-Nitrite, Lead, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Ookala (Dws) serve?

Ookala (Dws) reports serving 264 people in Hawaii, per its EPA record.

Has Ookala (Dws) had any water quality violations?

The EPA has no formal drinking-water violations on file for Ookala (Dws).

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.