Home hazard report for 99546 — Adak, AK
ZIP 99546 is served by Adak Utilities: 8 violations since 2016, latest lead result 13 ppb, PFAS not tested. Aleutians West Census Area is in EPA radon zone 3.
Health-based violations since 2016: Surface Water Treatment Rule. All are listed as resolved.
Below the current 15 ppb action level but above 10 ppb, the action level under EPA's Lead and Copper Rule Improvements (compliance from 2027). Latest round: Jan 2024.
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5 covers systems serving over 3,300 people and a sample of smaller ones).
Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.
FEMA’s overall natural-hazard risk for this census tract, relative to the rest of the U.S.
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code.
Active weather alerts
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Where ZIP 99546 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Adak Utilities
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Surface Water Treatment Rule | 8 |
A health-based violation means a contaminant exceeded its legal limit (MCL) or a required treatment technique was not met, as reported by the state to EPA’s SDWIS. All are listed as resolved or archived; the latest began Feb 2026.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5).
Radon in Aleutians West Census Area
EPA radon zone 3 — low potential. Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Natural hazard risk
FEMA rates the overall natural-hazard risk of this neighborhood (census tract) as Very High, with relatively moderate social vulnerability and very low community resilience.
FEMA National Risk Index (December 2025): expected annual losses from each hazard combined with social vulnerability and community resilience, rated relative to all U.S. census tracts. Hazards not listed are not applicable here. It describes the area, not a single building; flood insurance maps (FEMA FIRMs) decide flood-insurance requirements.
Live conditions: river gauges and flood levels · tornado warnings · wildfire detections · earthquakes — our sister maps, updated from NOAA, USGS and NASA every few minutes.
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Adak Naval Air Station Adak, Alaska · EPA ID AK4170024323 | Active (final NPL) | 1.7 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 99546
Who supplies drinking water to ZIP 99546?
Adak Utilities (EPA ID AK2260595), a surface water (rivers, lakes) system serving about 325 people.
Is there lead in Adak, AK tap water?
The utility’s latest 90th-percentile lead result (Jan 2024) was 13 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does Adak, AK water have PFAS?
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5 covers systems serving over 3,300 people and a sample of smaller ones).
Has the water system in 99546 had violations?
Health-based violations since 2016: Surface Water Treatment Rule. All are listed as resolved.
What natural hazards affect ZIP 99546?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Very High; the highest-rated hazards are tsunami (very high), earthquake (relatively high), volcanic activity (relatively high).
Are there Superfund sites near 99546?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: Adak Naval Air Station (1.7 mi, Active (final NPL)).
Is radon a problem in Aleutians West Census Area?
Aleutians West Census Area is in EPA radon zone 3 (low potential). Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.