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Tap water quality report

Old Harbor, AK

EPA monitoring detected 13 contaminants across the 1 water supplier serving Old Harbor. 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
246
people served
13
contaminants found
Alaska rankings Lead in Alaska PFAS in Alaska

What was found in Old Harbor'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
1782 µg/L 137%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
Main supplier: OLD HARBOR · 246 people · 2014
1/1 SYR4
Nitrate-Nitrite
779 µg/L 7.8%
of the EPA limit 10000 µg/L
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
TTHM
7.22 µg/L 9%
of the EPA limit 80 µg/L
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Barium
5.6 µg/L 0.3%
of the EPA limit 2000 µg/L
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Lead
4.71 µg/L 31%
of the EPA limit 15 µg/L
Main supplier: OLD HARBOR · 246 people · 2014
1/1 SYR4
Total Haloacetic Acids (HAA5)
4.2 µg/L 7%
of the EPA limit 60 µg/L
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Chloroform
3.54 µg/L
No EPA limit set
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Bromodichloromethane
2.41 µg/L
No EPA limit set
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Dichloroacetic Acid
2.35 µg/L
No EPA limit set
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Trichloroacetic Acid
1.94 µg/L
No EPA limit set
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Dibromochloromethane
1.343 µg/L
No EPA limit set
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Toluene
0.5400 µg/L 0.1%
of the EPA limit 1000 µg/L
Main supplier: OLD HARBOR · 246 people · 2019
1/1 SYR4
Lead
0.0054 mg/L 36%
of the EPA limit 0.0150 mg/L
Main supplier: OLD HARBOR · 246 people · 2026
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 Old Harbor

SupplierPopulation served
OLD HARBOR 246

Frequently asked questions about Old Harbor tap water

Is Old Harbor tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Old Harbor. 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 Old Harbor?

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

What contaminants are in Old Harbor's water?

The contaminants EPA monitoring detected in Old Harbor include Copper, Nitrate-Nitrite, TTHM, Barium, 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.