Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Anchorage Municipality, Alaska
EPA puts Anchorage Municipality in Zone 3, its lowest radon zone, and most reported tests there come back low, though 3.1% of 130 (2022) reached 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
3.1%
8.4 pts below AK
- Anchorage Municipality
- 3.1%
- Alaska
- 11.5%
130 tests, 2022
Median result
0.5pCi/L
Below action level
- Anchorage Municipality
- 0.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2022
Tests reported
130
Most tested in Alaska
- Anchorage Municipality
- 130
Reported to CDC before any fix, 2022
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Alaska
3 of 3
Lowest quarter
- Anchorage Municipality
- 3.1%
- Fairbanks North Star Borough
- 19.4%
By share, of 3 with 30+ tests
Read a result for Anchorage Municipality
Starts at Anchorage Municipality's median, 0.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.5 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Anchorage Municipality's median reported result, 2022.
The data
Anchorage Municipality, At a glance
Anchorage Municipality at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 96% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Anchorage Municipality, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 11.8% |
| 2015 | 19.2% |
| 2016 | 19.0% |
| 2017 | 16.7% |
| 2018 | 0.0% |
| 2019 | 7.7% |
| 2020 | 5.3% |
| 2021 | 6.1% |
| 2022 | 3.1% |
2022: 3.1%. Across these years the share ran from 0.0% to 19.2%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 130 tests reported to CDC for Anchorage Municipality over 2022, many from homes being sold or already suspected of a problem: they describe the borough or census area's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Anchorage Municipality, Compared
Anchorage Municipality radon figures, compared
Calculated by Radon411Only 4 of 130 radon tests reported for Anchorage Municipality in 2022 reached 4 pCi/L (3.1%). The median result, 0.5 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 62.7 pCi/L.
Across 19 Alaska counties pooled together, 11.5% of tests reached that level, so Anchorage Municipality runs 8.4 points below its state. Against the national pool of 23.9%, the gap is 20.8 points lower. Its place in the state: 3rd of 3 Alaska counties with 30 or more tests for the same period.
Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 3.1% share point the same way here. Matanuska-Susitna Borough, the one bordering county with a figure for the same period, reported 14.3%.
Below the action level, 112 tests (86.2%) came in under 2 pCi/L, against 75.2% statewide, and 14 tests (10.8%) fell between 2 and 4, against 13.4% statewide. Over 4 years of annual figures the share fell 4.6 points, from 7.7% in 2019 to 3.1% in 2022; its peak was 7.7% in 2019. USGS geology rates 96% of the county's land low radon potential.
The busiest year on file was 2020, with 303 tests reported; the quietest, 2018, had 13.
Anchorage MunicipalityAlaska, pooled
3.1% % of tests11.5% % of tests
| Year | Tests | Anchorage Municipality, at or above 4 pCi/L | Alaska, pooled |
|---|---|---|---|
| 2019 | 78 | 7.7% | 14.5% |
| 2020 | 303 | 5.3% | 15.9% |
| 2021 | 82 | 6.1% | 18.8% |
| 2022 | 130 | 3.1% | 11.5% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Anchorage Municipality, Geology
The ground under Anchorage Municipality
PredictedMost of the ground under Anchorage Municipality is one class on USGS's geologic map: 95.6% of its land is low radon potential, with 3.4% moderate. 95.6% of it lies in the area the map calls Pacific Border Ranges, to which USGS gives a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Pacific Border Ranges | Paleozoic and Mesozoic sedimentary and metamorphic rocks with some mafic volcanic and intrusive rocks. | Low | 7 | 95.6% |
| Coastal Trough | marine and continental sedimentary rocks; Tertiary volcanic rocks | Moderate | 9 | 3.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Anchorage Municipality beside the ground around it
Alaska as a whole has more moderate-potential ground than Anchorage Municipality: 79.2% of its land, against 3.4% here. Every one of the 3 boroughs and census areas that border it has more moderate-potential ground, Matanuska-Susitna Borough the most at 93.9%.
The map rates the ground, not the air in any home.
Local help
Anchorage Municipality, Local resources
Radon testing and mitigation in Anchorage Municipality
- 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
Anchorage Municipality, Questions
Questions about radon in Anchorage Municipality
Are radon levels high in Anchorage Municipality?
In 2022, 3.1% of the radon tests reported to CDC for Anchorage Municipality, Alaska were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.5 pCi/L. Of 3 Alaska counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 11.5%.
Which counties border Anchorage Municipality?
Anchorage Municipality borders 3 boroughs and census areas: Kenai Peninsula Borough, Matanuska-Susitna Borough and Valdez-Cordova Census Area.
Products
Anchorage Municipality, Products
Testing a home in Anchorage Municipality
In Anchorage Municipality, 3.1% of 130 tests reported to CDC in 2022 reached 4 pCi/L, against 11.5% pooled across Alaska. 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 Anchorage Municipality.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
MonitorSafetySiren
Pro4 plug-in radon detector with a display and alarm
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 48 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Best radon monitors for Anchorage Municipality homes, compared
Explore
Anchorage Municipality, Bordering boroughs and census areas
Boroughs and census areas bordering Anchorage Municipality
Calculated by Radon41114.3%at or above 4 pCi/L
Median 1.1 pCi/L · 42 tests · 11.2 points above Anchorage Municipality
- Radon levels in Kenai Peninsula BoroughEPA zone 2
8.3%at or above 4 pCi/L
Median 0.8 pCi/L · 24 tests · 5.2 points above Anchorage Municipality
No CDC figure for 2022; its page reads it against its own neighbours.
Anchorage Municipality, Cities and towns
Cities and towns in Anchorage Municipality
About 287,155 people live in Anchorage Municipality by the Census Bureau's estimate for July 1, 2025, 3,722 fewer than in 2020 (−1.3%). That works out to 168 people per square mile of land. Anchorage, its one incorporated place, has 287,155 residents, 100.0% of the total. CDC's 130 reported tests for 2022 work out to 0.5 per 1,000 residents (2025 estimate), close to Alaska's 0.4.
Anchorage is the one incorporated place here; CDC publishes no figure by town, so it reads Anchorage Municipality's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Anchorage | 287,155 | −1.3% | 100.0% |
One incorporated place, 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).
Anchorage Municipality, Homes
Homes in Anchorage Municipality
Fewer than six in ten of Anchorage Municipality's 119,717 homes are detached houses (47%, against 63% across Alaska); the rest are attached, in shared buildings or mobile. Half of its homes were built before 1982, close to Alaska's 1985: 7% date from before 1960 and 19% from 2000 or later. 64% of occupied homes are lived in by their owner (Alaska: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Anchorage Municipality | Alaska |
|---|---|---|
| Housing units | 119,717 | 327,610 |
| Detached houses | 47% | 63% |
| In buildings of 5 or more | 18% | 12% |
| Mobile homes | 4% | 4% |
| Built before 1960 | 7% | 8% |
| Built since 2000 | 19% | 25% |
| Middle year built | 1982 | 1985 |
| Owner-occupied | 64% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.