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Tap water quality report

Atka, AK

EPA monitoring detected 17 contaminants across the 1 water supplier serving Atka. 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
people served
17
contaminants found
Alaska rankings Lead in Alaska PFAS in Alaska

What was found in Atka'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
Copper
219.8 µg/L 17%
of the EPA limit 1300 µg/L
Main supplier: ATKA · 50 people · 2017
1/1 SYR4
Cyanide
91 µg/L 46%
of the EPA limit 200 µg/L
Main supplier: ATKA · 50 people · 2012
1/1 SYR4
TTHM
51.54 µg/L 64%
of the EPA limit 80 µg/L
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
25.2 µg/L 42%
of the EPA limit 60 µg/L
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Bromodichloromethane
19.12 µg/L
No EPA limit set
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Chloroform
17.61 µg/L
No EPA limit set
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Dibromochloromethane
14.61 µg/L
No EPA limit set
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Dichloroacetic Acid
12.25 µg/L
No EPA limit set
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Trichloroacetic Acid
9.25 µg/L
No EPA limit set
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Lead
7.1 µg/L 47%
of the EPA limit 15 µg/L
Main supplier: ATKA · 50 people · 2017
1/1 SYR4
Barium
5.39 µg/L 0.3%
of the EPA limit 2000 µg/L
Main supplier: ATKA · 50 people · 2012
1/1 SYR4
Dibromoacetic Acid
4.15 µg/L
No EPA limit set
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Bromoform
3.0175 µg/L
No EPA limit set
Main supplier: ATKA · 50 people · 2019
1/1 SYR4
Selenium
0.9990 µg/L 2%
of the EPA limit 50 µg/L
Main supplier: ATKA · 50 people · 2012
1/1 SYR4
Chromium
0.6480 µg/L 0.6%
of the EPA limit 100 µg/L
Main supplier: ATKA · 50 people · 2012
1/1 SYR4
Arsenic
0.3820 µg/L 3.8%
of the EPA limit 10 µg/L
Main supplier: ATKA · 50 people · 2012
1/1 SYR4
Lead
0.0037 mg/L 25%
of the EPA limit 0.0150 mg/L
Main supplier: ATKA · 50 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 Atka

SupplierPopulation served
ATKA 50

Frequently asked questions about Atka tap water

Is Atka tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Atka. 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 Atka?

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

What contaminants are in Atka's water?

The contaminants EPA monitoring detected in Atka include Copper, Cyanide, TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane. 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.