Is Waikoloa (Dho), HI Tap Water Safe? Quality & Contaminants

What was found in Waikoloa (Dho)'s water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	1315 µg/L 13% of the EPA limit 10000 µg/L Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Nitrate-Nitrite	1310 µg/L 13% of the EPA limit 10000 µg/L Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Fluoride	404 µg/L 10% of the EPA limit 4000 µg/L Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Copper	58.65 µg/L 4.5% of the EPA limit 1300 µg/L Main supplier: WAIKOLOA · 12,100 people · 2018	1/1	SYR4
Lead	9.3575 µg/L 62% of the EPA limit 15 µg/L Main supplier: WAIKOLOA · 12,100 people · 2018	1/1	SYR4
TTHM	8.64 µg/L 11% of the EPA limit 80 µg/L Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Bromoform	7.32 µg/L No EPA limit set Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Gross Beta Particle Activity	4.74 pCi/L No EPA limit set Main supplier: WAIKOLOA · 12,100 people · 2014	1/1	SYR4
Chromium	4.562 µg/L 4.6% of the EPA limit 100 µg/L Main supplier: WAIKOLOA · 12,100 people · 2017	1/1	SYR4
Barium	3.9 µg/L 0.2% of the EPA limit 2000 µg/L Main supplier: WAIKOLOA · 12,100 people · 2017	1/1	SYR4
Total Haloacetic Acids (HAA5)	2.7 µg/L 4.5% of the EPA limit 60 µg/L Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Dibromoacetic Acid	1.445 µg/L No EPA limit set Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Dibromochloromethane	1.335 µg/L No EPA limit set Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Monobromoacetic Acid	1.295 µg/L No EPA limit set Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Dichloroacetic Acid	1 µg/L No EPA limit set Main supplier: WAIKOLOA · 12,100 people · 2019	1/1	SYR4
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: WAIKOLOA · 12,100 people · 2021	1/1	LCR

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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Waikoloa (Dho)

Supplier	Population served
WAIKOLOA	12,100

Frequently asked questions about Waikoloa (Dho) tap water

Is Waikoloa (Dho) tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Waikoloa (Dho). A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Waikoloa (Dho)?

1 public water supplier report drinking-water monitoring for Waikoloa (Dho), Hawaii to the EPA. Each is listed above with its population served.

What contaminants are in Waikoloa (Dho)'s water?

The contaminants EPA monitoring detected in Waikoloa (Dho) include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Lead. The full list, with the level at the main supplier and the data source, is in the table above.

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.