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Tap water quality report

North Kohala, HI

EPA monitoring detected 11 contaminants across the 1 water supplier serving North Kohala. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
4,933
people served
11
contaminants found
Hawaii rankings Lead in Hawaii PFAS in Hawaii

What was found in North Kohala's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
490 µg/L 4.9%
of the EPA limit 10000 µg/L
 1/1 SYR4
Nitrate-Nitrite
490 µg/L 4.9%
of the EPA limit 10000 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
7.2 µg/L 12%
of the EPA limit 60 µg/L
 1/1 SYR4
Dichloroacetic Acid
4.6 µg/L
No EPA limit set
 1/1 SYR4
TTHM
3.3 µg/L 4.1%
of the EPA limit 80 µg/L
 1/1 SYR4
Bromoform
2 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
1.3 µg/L
No EPA limit set
 1/1 SYR4
Monobromoacetic Acid
1.3 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
1.3 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
1.2 µg/L
No EPA limit set
 1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 North Kohala

SupplierPopulation served
NORTH KOHALA 4,933

Frequently asked questions about North Kohala tap water

Is North Kohala tap water safe to drink?

EPA testing detected 11 contaminants in the water serving North Kohala. 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 North Kohala?

1 public water supplier report drinking-water monitoring for North Kohala, Hawaii to the EPA. Each is listed above with its population served.

What contaminants are in North Kohala's water?

The contaminants EPA monitoring detected in North Kohala include Nitrate, Nitrate-Nitrite, Total Haloacetic Acids (HAA5), Dichloroacetic Acid, TTHM. The full list, with the highest level found 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.