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Tap water quality report

Pearl Harbor, HI

EPA monitoring detected 20 contaminants across the 1 water supplier serving Pearl Harbor. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
65,230
people served
20
contaminants found
Hawaii rankings Lead in Hawaii PFAS in Hawaii

What was found in Pearl Harbor'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
2500 µg/L 25%
of the EPA limit 10000 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Nitrate-Nitrite
2460 µg/L 25%
of the EPA limit 10000 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2018
1/1 SYR4
Fluoride
861.5 µg/L 22%
of the EPA limit 4000 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Copper
112.4 µg/L 8.6%
of the EPA limit 1300 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Chloroform
32 µg/L
No EPA limit set
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Barium
15.313 µg/L 0.8%
of the EPA limit 2000 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2017
1/1 SYR4
TTHM
13.78 µg/L 17%
of the EPA limit 80 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Chromium
10.86 µg/L 11%
of the EPA limit 100 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2017
1/1 SYR4
Bromoform
9.805 µg/L
No EPA limit set
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Dibromochloromethane
3.2 µg/L
No EPA limit set
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Gross Beta Particle Activity
2.4 pCi/L
No EPA limit set
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2018
1/1 SYR4
Total Haloacetic Acids (HAA5)
1.97 µg/L 3.3%
of the EPA limit 60 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.575 µg/L
No EPA limit set
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.51 µg/L
No EPA limit set
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Bromodichloromethane
1.5 µg/L
No EPA limit set
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2019
1/1 SYR4
Arsenic
1.195 µg/L 12%
of the EPA limit 10 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2017
1/1 SYR4
Chlordane
0.3590 µg/L 18%
of the EPA limit 2 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2017
1/1 SYR4
Heptachlor Epoxide
0.0200 µg/L 10%
of the EPA limit 0.2000 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2017
1/1 SYR4
1,2-DIBROMO-3-CHLOROPROPANE
0.0140 µg/L 7%
of the EPA limit 0.2000 µg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2017
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: JOINT BASE PEARL HARBOR-HICKAM · 65,230 people · 2023
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 Pearl Harbor

SupplierPopulation served
JOINT BASE PEARL HARBOR-HICKAM 65,230

Frequently asked questions about Pearl Harbor tap water

Is Pearl Harbor tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Pearl Harbor. 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 Pearl Harbor?

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

What contaminants are in Pearl Harbor's water?

The contaminants EPA monitoring detected in Pearl Harbor include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Chloroform. 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.