Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Aleutians West Census Area, Alaska
EPA puts Aleutians West Census Area in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
19.4%
Fairbanks North Star Borough, 1,619 miles
- Fairbanks North Star Borough
- 19.4%
- Alaska
- 11.5%
Share at 4+ pCi/L, 72 tests, 2022
Ground above low
82.0%
2.7 pts above Alaska
- Aleutians West Census Area
- 82.0%
- Alaska
- 79.2%
Share of land USGS rates moderate or high potential
Tests reported
0
None published
A home here needs its own test
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Aleutians West Census Area
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Aleutians West Census Area, At a glance
Aleutians West Census Area at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Moderate across 82% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
No CDC test figures here
CDC has published no radon test figures for Aleutians West Census Area. Fairbanks North Star Borough, 1,619 miles away, is the nearest county with a figure in 2022.
Aleutians West Census Area, Compared
Aleutians West Census Area radon figures, compared
Calculated by Radon411No CDC figure names Aleutians West Census Area, in any year or ten-year total; in 2022, the agency's counts reach 19 Alaska counties without it. Pooled across 19 Alaska counties, 11.5% of reported tests reached that level; across every county in the country with a figure, 23.9%.
The nearest counties with a figure are Fairbanks North Star Borough (1,619 miles away) at 19.4%, Anchorage Municipality (1,671 miles away) at 3.1% and Matanuska-Susitna Borough (1,689 miles away) at 14.3%. Statewide for the same period, Fairbanks North Star Borough reported the highest share (19.4%) and Anchorage Municipality the lowest (3.1%).
EPA's 1993 map puts Aleutians West Census Area in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 82% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Aleutians West Census Area, Geology
The ground under Aleutians West Census Area
PredictedUSGS's geologic map puts all of Aleutians West Census Area's mapped land in one class: moderate radon potential. 82.0% of it lies in the area the map calls Alaska-Aleutian Province, to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Alaska-Aleutian Province | sedimentary and mafic volcanic rocks, glacial deposits; felsic intrusives; metamorphic rocks | Moderate | 9 | 82.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Aleutians West Census Area beside the ground around it
On moderate-potential ground Aleutians West Census Area is close to Alaska as a whole: 82.0% of its land against 79.2%.
The map rates the ground, not the air in any home.
Local help
Aleutians West Census Area, Local resources
Radon testing and mitigation in Aleutians West Census Area
- Alaska's radon programAlaska Division of Geological & Geophysical SurveysAlaska's radon program answers questions about testing, mitigation and the rules in Alaska.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Alaska directoryNo professionals are listed in Alaska yet. The state program can point you to registered testers and mitigators.
What Alaska's program says
- Phone
- 907-269-6401
- paul.goodfellow@alaska.gov
What it means
Aleutians West Census Area, Questions
Questions about radon in Aleutians West Census Area
Are radon levels high in Aleutians West Census Area?
No CDC testing statistics are published here for Aleutians West Census Area, Alaska yet. Of the 3 nearest counties with a figure, within 1,689 miles, the share of tests at or above 4 pCi/L runs from 3.1% to 19.4%.
Which counties border Aleutians West Census Area?
No county is recorded as sharing a land boundary with Aleutians West Census Area.
Products
Aleutians West Census Area, Products
Testing a home in Aleutians West Census Area
No CDC figure names Aleutians West Census Area; the nearest county with one, Fairbanks North Star Borough (1,619 miles away), reported 19.4% of its tests at or above 4 pCi/L in 2022, the only reading nearby until a test of this home. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Aleutians West Census Area.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorPYZYCKYH
RD17 plug-in radon detector with a rechargeable battery and color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Best radon monitors for Aleutians West Census Area homes, compared
Explore
Aleutians West Census Area, Bordering boroughs and census areas
Boroughs and census areas bordering Aleutians West Census Area
Calculated by Radon411No bordering counties on file
Aleutians West Census Area has no county recorded as sharing a land boundary with it. Island and coastal county equivalents legitimately have none.
Aleutians West Census Area, Cities and towns
Cities and towns in Aleutians West Census Area
The Census Bureau estimates 5,240 residents in Aleutians West Census Area for July 1, 2025, 63 more than in 2020 (+1.2%). Spread over its land, that is 1.2 people to the square mile. Unalaska alone is home to 4,306 of them, 82.2% of the total. Together its 5 incorporated places hold 94.6% of those residents; the other 5.4% live outside any of them. CDC publishes no radon test count for Aleutians West Census Area; across Alaska its counts for 2022 come to 0.4 tests for every 1,000 residents (2025 estimate).
From Unalaska to Atka, CDC publishes no figure by town: each reads Aleutians West Census Area's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Unalaska | 4,306 | +1.2% | 82.2% |
| St. Paul | 418 | +2.2% | 8.0% |
| Adak | 112 | +0.9% | 2.1% |
| St. George | 63 | Level | 1.2% |
| Atka | 58 | Level | 1.1% |
5 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
Aleutians West Census Area, Homes
Homes in Aleutians West Census Area
Fewer than six in ten of Aleutians West Census Area's 1,391 homes are detached houses (28%, against 63% across Alaska); the rest are attached, in shared buildings or mobile. Half of its homes were built before 1988, close to Alaska's 1985: 12% date from before 1960 and 15% from 2000 or later. Most occupied homes here are rented: owners live in 29% (Alaska: 67%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Aleutians West Census Area | Alaska |
|---|---|---|
| Housing units | 1,391 | 327,610 |
| Detached houses | 28% | 63% |
| In buildings of 5 or more | 29% | 12% |
| Mobile homes | 2% | 4% |
| Built before 1960 | 12% | 8% |
| Built since 2000 | 15% | 25% |
| Middle year built | 1988 | 1985 |
| Owner-occupied | 29% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.