Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Denali Borough, Alaska
EPA puts Denali Borough in Zone 3, its lowest radon zone, and only 2 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
19.4%
Fairbanks North Star Borough
- Fairbanks North Star Borough
- 19.4%
- Matanuska-Susitna Borough
- 14.3%
2 of 4 neighbours have 30+ tests, 2022
Nearest county
14.3%
Matanuska-Susitna Borough, 95 miles
- Matanuska-Susitna Borough
- 14.3%
- Alaska
- 11.5%
Share at 4+ pCi/L, 42 tests, 2022
Ground above low
100.0%
20.8 pts above Alaska
- Denali Borough
- 100.0%
- Alaska
- 79.2%
Share of land USGS rates moderate or high potential
Tests reported
5
Too few for a share
- Denali Borough
- 5
- Needed
- 30
2017
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 Denali Borough
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
Denali Borough, At a glance
Denali Borough at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Denali Borough, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 100.0% |
| 2016 | 66.7% |
| 2017 | 60.0% |
| 2018 | 50.0% |
| 2020 | 100.0% |
| 2021 | 0.0% |
| 2022 | 50.0% |
2022: 50.0%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 2 tests were reported to CDC for Denali Borough over 2022, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the borough or census area nor this house.
Measured: CDC tracking data. Figure above: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Denali Borough, Compared
Denali Borough radon figures, compared
Calculated by Radon411CDC's largest figure for Denali Borough rests on 5 tests in 2017, 3 of them at or above 4 pCi/L, so each test moves its share by 20.0 points and no rank or comparison is drawn from it. Results reached as high as 69.6 pCi/L, with a middle value of 6.2 pCi/L.
Of the counties bordering it, 2 have a figure in 2022: Fairbanks North Star Borough reported the largest share at or above 4 pCi/L, 19.4%, and Matanuska-Susitna Borough the smallest, 14.3%. Farther out, Anchorage Municipality (177 miles away) at 3.1% have figures too. Pooled across 19 Alaska counties, 11.5% of reported tests reached that level; across every county in the country with a figure, 23.9%.
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 Denali Borough in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Denali Borough, Geology
The ground under Denali Borough
PredictedUSGS's geologic map puts all of Denali Borough's mapped land in one class: moderate radon potential. The map puts 56.4% of Denali Borough in the area it calls Alaska-Aleutian Province and 39.3% in Central Alaska, with one smaller area beside them. USGS gives the first a radon index of 9 and the second 11, both 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 | 56.4% |
| Central Alaska | Uraniferous granites, felsic intrusives; clastic and carbonate sedimentary rocks; metamorphic, and volcanic rocks. | Moderate | 11 | 39.3% |
| Coastal Trough | marine and continental sedimentary rocks; Tertiary volcanic rocks | Moderate | 9 | 4.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Denali Borough beside the ground around it
Denali Borough has more moderate-potential ground than Alaska as a whole: 100% of its land against 79.2%. Of the 4 boroughs and census areas that border it, none has as large a share of moderate-potential ground; Fairbanks North Star Borough comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Denali Borough, Local resources
Radon testing and mitigation in Denali Borough
- 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
Denali Borough, Questions
Questions about radon in Denali Borough
Are radon levels high in Denali Borough?
In 2022, 50.0% of the radon tests reported to CDC for Denali Borough, Alaska were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.6 pCi/L. Of the counties bordering it, 2 have a figure in 2022: Fairbanks North Star Borough reported the largest share at or above 4 pCi/L, 19.4%, and Matanuska-Susitna Borough the smallest, 14.3%.
Which counties border Denali Borough?
Denali Borough borders 4 boroughs and census areas: Matanuska-Susitna Borough, Fairbanks North Star Borough, Yukon-Koyukuk Census Area and Southeast Fairbanks Census Area.
Products
Denali Borough, Products
Testing a home in Denali Borough
No CDC figure names Denali Borough; the nearest county with one, Matanuska-Susitna Borough (95 miles away), reported 14.3% 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 Denali Borough.
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
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Denali Borough, Bordering boroughs and census areas
Boroughs and census areas bordering Denali Borough
Calculated by Radon41180.0%at or above 4 pCi/L
Median 5.8 pCi/L · 10 tests
19.4%at or above 4 pCi/L
Median 1.4 pCi/L · 72 tests
14.3%at or above 4 pCi/L
Median 1.1 pCi/L · 42 tests
No CDC figure for 2022; its page reads it against its own neighbours.
Denali Borough, Cities and towns
Cities and towns in Denali Borough
Denali Borough's population has barely moved since 2020: 1,616 residents on July 1, 2025 against 1,612 then, by the Census Bureau's estimates. Spread over its land, that is 0.1 people to the square mile. Anderson, its one incorporated place, has 177 residents, 11.0% of the total. Testing is reported here more often than across the state: CDC's 5 reported tests for 2017 come to 3.1 for every 1,000 residents (2025 estimate), against 0.1 for Alaska.
Anderson is the one incorporated place here; CDC publishes no figure by town, so it reads Denali Borough's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Anderson | 177 | +0.6% | 11.0% |
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).
Denali Borough, Homes
Homes in Denali Borough
Denali Borough is a place of houses on their own lots: 84% of its 1,306 homes are detached single-family houses, against 63% across Alaska. Half of its homes were built before 1989, close to Alaska's 1985: 6% date from before 1960 and 26% from 2000 or later. Owners live in 78% of the occupied homes (Alaska: 67%), so for most households a test and a fix are their own to order.
| Homes | Denali Borough | Alaska |
|---|---|---|
| Housing units | 1,306 | 327,610 |
| Detached houses | 84% | 63% |
| In buildings of 5 or more | 3% | 12% |
| Mobile homes | 7% | 4% |
| Built before 1960 | 6% | 8% |
| Built since 2000 | 26% | 25% |
| Middle year built | 1989 | 1985 |
| Owner-occupied | 78% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.