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Tap water quality report

North Kona, HI

EPA monitoring detected 18 contaminants across the 1 water supplier serving North Kona. 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
29,581
people served
18
contaminants found
Hawaii rankings Lead in Hawaii PFAS in Hawaii

What was found in North Kona'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
1200 µg/L 12%
of the EPA limit 10000 µg/L
 1/1 SYR4
Nitrate-Nitrite
1200 µg/L 12%
of the EPA limit 10000 µg/L
 1/1 SYR4
Fluoride
690 µg/L 17%
of the EPA limit 4000 µg/L
 1/1 SYR4
Copper
392 µg/L 30%
of the EPA limit 1300 µg/L
 1/1 SYR4
Lead
18 µg/L 120%
of the EPA limit, in the worst sample — 15 µg/L
 1/1 SYR4
Barium
14.35 µg/L 0.7%
of the EPA limit 2000 µg/L
 1/1 SYR4
Gross Beta Particle Activity
13 pCi/L
No EPA limit set
 1/1 SYR4
Bromoform
10.7 µg/L
No EPA limit set
 1/1 SYR4
TTHM
10.7 µg/L 13%
of the EPA limit 80 µg/L
 1/1 SYR4
Dibromochloromethane
3.8 µg/L
No EPA limit set
 1/1 SYR4
Chromium
3.29 µg/L 3.3%
of the EPA limit 100 µg/L
 1/1 SYR4
Combined Uranium
2.5 µg/L 8.3%
of the EPA limit 30 µg/L
 1/1 SYR4
Bromodichloromethane
1.8 µg/L
No EPA limit set
 1/1 SYR4
Arsenic
1.1 µg/L 11%
of the EPA limit 10 µg/L
 1/1 SYR4
Chloroform
1.1 µg/L
No EPA limit set
 1/1 SYR4
Xylenes, Total
0.7300 µg/L 0%
of the EPA limit 10000 µg/L
 1/1 SYR4
Gross Alpha, Excl. Radon And U
0.2300 pCi/L 1.5%
of the EPA limit 15 pCi/L
 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 Kona

SupplierPopulation served
NORTH KONA 29,581

Frequently asked questions about North Kona tap water

Is North Kona tap water safe to drink?

EPA testing detected 18 contaminants in the water serving North Kona. 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 Kona?

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

What contaminants are in North Kona's water?

The contaminants EPA monitoring detected in North Kona include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Lead. 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.