Tap WaterIndex

← Alaska

Tap water quality report

Klawock, AK

EPA monitoring detected 11 contaminants across the 1 water supplier serving Klawock. 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
904
people served
11
contaminants found
Alaska rankings Lead in Alaska PFAS in Alaska

What was found in Klawock'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
615.45 µg/L 47%
of the EPA limit 1300 µg/L
Main supplier: KLAWOCK · 904 people · 2018
1/1 SYR4
Chloroform
127 µg/L
No EPA limit set
Main supplier: KLAWOCK · 904 people · 2019
1/1 SYR4
TTHM
117.65 µg/L 147%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: KLAWOCK · 904 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
96.775 µg/L 161%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: KLAWOCK · 904 people · 2019
1/1 SYR4
Trichloroacetic Acid
77.4 µg/L
No EPA limit set
Main supplier: KLAWOCK · 904 people · 2019
1/1 SYR4
Dichloroacetic Acid
31 µg/L
No EPA limit set
Main supplier: KLAWOCK · 904 people · 2019
1/1 SYR4
Monochloroacetic Acid
7.18 µg/L
No EPA limit set
Main supplier: KLAWOCK · 904 people · 2019
1/1 SYR4
Lead
3.648 µg/L 24%
of the EPA limit 15 µg/L
Main supplier: KLAWOCK · 904 people · 2018
1/1 SYR4
Bromodichloromethane
3.612 µg/L
No EPA limit set
Main supplier: KLAWOCK · 904 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.66 pCi/L 33%
of the EPA limit 5 pCi/L
Main supplier: KLAWOCK · 904 people · 2016
1/1 SYR4
Lead
0.0036 mg/L 24%
of the EPA limit 0.0150 mg/L
Main supplier: KLAWOCK · 904 people · 2024
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 Klawock

SupplierPopulation served
KLAWOCK 904

Frequently asked questions about Klawock tap water

Is Klawock tap water safe to drink?

EPA testing detected 11 contaminants in the water serving Klawock. 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 Klawock?

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

What contaminants are in Klawock's water?

The contaminants EPA monitoring detected in Klawock include Copper, Chloroform, TTHM, Total Haloacetic Acids (HAA5), Trichloroacetic Acid. 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.