Water Quality in Unalaska, AK (99638)
EPA violation data for public water systems serving ZIP code 99638.
No Health-Based Violations
None of the 2 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There are12 monitoring/reporting violations (missed testing deadlines), all resolved.
Better than 70% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
1
Population
2
Water Systems
12
Violations (5yr)
0
Health-Based
Location
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Water Systems Serving This Area (2)
Unalaska Water System
All resolvedNikolski Village
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
Used to disinfect water — generally safe at regulated levels.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2022
How Does This Compare?
Unalaska (99638) has more violations than 70% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 12, most of which are monitoring/reporting issues.
Water Filter Recommendations
No contaminant issues detected. For general protection, a basic carbon filter removes common impurities like chlorine and sediment. Look for NSF/ANSI 42 certified products.