CITY REPORT
AK
7 HEALTH VIOLATIONS
Chefornak, 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 Chefornak, Alaska, covering 1 community water system serving approximately 513 people.
1 of 1 ZIP code (100%) have recorded EPA violations. 7 health-based violations documented.
Water Sources
Chefornak water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Chefornak
- 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 |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 146 | 1 |
| Contaminant 0700 | Other | 20 | 1 |
| Lead | Inorganic | 14 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 12 | 1 |
| Stage 1 DBP Rule | Treatment Technique | 10 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 99561 | — | 203 | 7 | CHEFORNAK WATER SYSTEM |
All ZIP Codes in Chefornak
- 99561 — 203 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.