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Tap water quality report

Napaskiak, AK

EPA monitoring detected 13 contaminants across the 1 water supplier serving Napaskiak. 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
200
people served
13
contaminants found
Alaska rankings Lead in Alaska PFAS in Alaska

What was found in Napaskiak'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-Nitrite
1067.5 µg/L 11%
of the EPA limit 10000 µg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2018
1/1 SYR4
Copper
409.35 µg/L 31%
of the EPA limit 1300 µg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
Nitrate
242 µg/L 2.4%
of the EPA limit 10000 µg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
Total Haloacetic Acids (HAA5)
14.4835 µg/L 24%
of the EPA limit 60 µg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
Lead
14.115 µg/L 94%
of the EPA limit 15 µg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
Dichloroacetic Acid
12.4885 µg/L
No EPA limit set
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
TTHM
3.8 µg/L 4.8%
of the EPA limit 80 µg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
Chloroform
3.665 µg/L
No EPA limit set
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
Monochloroacetic Acid
2 µg/L
No EPA limit set
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
Trichloroacetic Acid
1.9 µg/L
No EPA limit set
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2016
1/1 SYR4
Toluene
0.8500 µg/L 0.1%
of the EPA limit 1000 µg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2017
1/1 SYR4
Xylenes, Total
0.7035 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2017
1/1 SYR4
Lead
0.0074 mg/L 49%
of the EPA limit 0.0150 mg/L
Main supplier: NAPASKIAK WEST WATER SYSTEM · 200 people · 2020
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 Napaskiak

SupplierPopulation served
NAPASKIAK WEST WATER SYSTEM 200

Frequently asked questions about Napaskiak tap water

Is Napaskiak tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Napaskiak. 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 Napaskiak?

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

What contaminants are in Napaskiak's water?

The contaminants EPA monitoring detected in Napaskiak include Nitrate-Nitrite, Copper, Nitrate, Total Haloacetic Acids (HAA5), 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.