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Tap water quality report

Sitka, AK

EPA monitoring detected 15 contaminants across the 1 water supplier serving Sitka. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
9,448
people served
15
contaminants found
Alaska rankings Lead in Alaska PFAS in Alaska

What was found in Sitka's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
1050 µg/L 81%
of the EPA limit 1300 µg/L
 1/1 SYR4
Fluoride
459 µg/L 11%
of the EPA limit 4000 µg/L
 1/1 SYR4
Nitrate-Nitrite
380 µg/L 3.8%
of the EPA limit 10000 µg/L
 1/1 SYR4
Nitrate
185 µg/L 1.9%
of the EPA limit 10000 µg/L
 1/1 SYR4
Lead
65.7 µg/L 438%
of the EPA limit, in the worst sample — 15 µg/L
 1/1 SYR4
TTHM
39.4 µg/L 49%
of the EPA limit 80 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
38 µg/L 63%
of the EPA limit 60 µg/L
 1/1 SYR4
Chloroform
36.4 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
24 µg/L
No EPA limit set
 1/1 SYR4
Dichloroacetic Acid
15 µg/L
No EPA limit set
 1/1 SYR4
Barium
9.65 µg/L 0.5%
of the EPA limit 2000 µg/L
 1/1 SYR4
Bromodichloromethane
3.85 µg/L
No EPA limit set
 1/1 SYR4
Dibromoacetic Acid
1.7 µg/L
No EPA limit set
 1/1 SYR4
Combined Radium (-226 And -228)
0.3500 pCi/L 7%
of the EPA limit 5 pCi/L
 1/1 SYR4
Lead
0.0083 mg/L 55%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 Sitka

SupplierPopulation served
SITKA 9,448

Frequently asked questions about Sitka tap water

Is Sitka tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Sitka. 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 Sitka?

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

What contaminants are in Sitka's water?

The contaminants EPA monitoring detected in Sitka include Copper, Fluoride, Nitrate-Nitrite, Nitrate, Lead. The full list, with the highest level found 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.