CITY REPORT
AK
14 HEALTH VIOLATIONS
Adak, AK Water Quality Report
1 ZIP code · 1 water system · Updated 2026-03-16
Data: EPA SDWIS Last verified: 2026-03-16
1
ZIP Codes
1
Water Systems
1
ZIPs with Violations
Zone 1
Radon Risk (High)
Overview
We track water quality and home safety data for 1 ZIP code in Adak, Alaska, covering 1 community water system serving approximately 325 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 14 health-based violations documented.
Water Sources
Adak water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Adak
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| E. coli | Microbiological | 110 | 1 |
| Revised Total Coliform Rule | Microbiological | 40 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 22 | 1 |
| Consumer Confidence Report Rule | Reporting | 14 | 1 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 99546 | — | 94 | 14 | ADAK UTILITIES |
All ZIP Codes in Adak
- 99546 — 94 violations ⚠
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.