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Tap water quality report

Mililani Bws, HI

EPA monitoring detected 10 contaminants across the 1 water supplier serving Mililani Bws. 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
50,573
people served
10
contaminants found
Hawaii rankings Lead in Hawaii PFAS in Hawaii

What was found in Mililani Bws'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
2200 µg/L 22%
of the EPA limit 10000 µg/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
Nitrate-Nitrite
2200 µg/L 22%
of the EPA limit 10000 µg/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
Fluoride
101 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
Copper
12.25 µg/L 0.9%
of the EPA limit 1300 µg/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
Barium
3.38 µg/L 0.2%
of the EPA limit 2000 µg/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
Chromium
2.055 µg/L 2.1%
of the EPA limit 100 µg/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
1.2 pCi/L 8%
of the EPA limit 15 pCi/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.1 pCi/L 22%
of the EPA limit 5 pCi/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
1,2-DIBROMO-3-CHLOROPROPANE
0.2770 µg/L 139%
of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L
Main supplier: MILILANI · 50,573 people · 2019
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: MILILANI · 50,573 people · 2018
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 Mililani Bws

SupplierPopulation served
MILILANI 50,573

Frequently asked questions about Mililani Bws tap water

Is Mililani Bws tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Mililani Bws. 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 Mililani Bws?

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

What contaminants are in Mililani Bws's water?

The contaminants EPA monitoring detected in Mililani Bws include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.