Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Yukon-Koyukuk Census Area, Alaska
EPA puts Yukon-Koyukuk Census Area in Zone 3, its lowest radon zone, and only 4 radon tests from it are on file with CDC (2019). 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 9 neighbours have 30+ tests, 2022
Nearest county
19.4%
Fairbanks North Star Borough, 149 miles
- Fairbanks North Star Borough
- 19.4%
- Alaska
- 11.5%
Share at 4+ pCi/L, 72 tests, 2022
Ground above low
100.0%
20.8 pts above Alaska
- Yukon-Koyukuk Census Area
- 100.0%
- Alaska
- 79.2%
Share of land USGS rates moderate or high potential
Tests reported
6
Too few for a share
- Yukon-Koyukuk Census Area
- 6
- Needed
- 30
2014
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 Yukon-Koyukuk 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
Yukon-Koyukuk Census Area, At a glance
Yukon-Koyukuk Census Area 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 Yukon-Koyukuk Census Area, 2019
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 33.3% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2019 | 75.0% |
2019: 75.0%. Across these years the share ran from 0.0% to 75.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 4 tests were reported to CDC for Yukon-Koyukuk Census Area over 2019, 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: 2019. Measured data period: 2014 to 2019 (every CDC figure on file).
Yukon-Koyukuk Census Area, Compared
Yukon-Koyukuk Census Area radon figures, compared
Calculated by Radon411CDC's largest figure for Yukon-Koyukuk Census Area rests on 6 tests in 2014, 2 of them at or above 4 pCi/L, so each test moves its share by 16.7 points and no rank or comparison is drawn from it. Results reached as high as 12.1 pCi/L, with a middle value of 1.7 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 (310 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 Yukon-Koyukuk Census Area 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.
Yukon-Koyukuk Census Area, Geology
The ground under Yukon-Koyukuk Census Area
PredictedUSGS's geologic map puts all of Yukon-Koyukuk Census Area's mapped land in one class: moderate radon potential. The map puts 52.6% of Yukon-Koyukuk Census Area in the area it calls Central Alaska and 33.5% in Northern Plateaus, with one smaller area beside them. USGS gives both a radon index of 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Central Alaska | Uraniferous granites, felsic intrusives; clastic and carbonate sedimentary rocks; metamorphic, and volcanic rocks. | Moderate | 11 | 52.6% |
| Northern Plateaus | Uraniferous granites, felsic intrusives; clastic and carbonate sedimentary rocks; metamorphic, and volcanic rocks. | Moderate | 11 | 33.5% |
| Arctic Mountains (Brooks Range) | Precambrian and paleozoic marine sedimentary, metamorphic, and volcanic rocks. | Moderate | 9 | 13.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Yukon-Koyukuk Census Area beside the ground around it
Yukon-Koyukuk Census Area has more moderate-potential ground than Alaska as a whole: 100% of its land against 79.2%. Of the 9 boroughs and census areas that border it, none has as large a share of moderate-potential ground; Denali Borough comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Yukon-Koyukuk Census Area, Local resources
Radon testing and mitigation in Yukon-Koyukuk 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
Yukon-Koyukuk Census Area, Questions
Questions about radon in Yukon-Koyukuk Census Area
Are radon levels high in Yukon-Koyukuk Census Area?
In 2019, 75.0% of the radon tests reported to CDC for Yukon-Koyukuk Census Area, Alaska were at or above 4 pCi/L, and the median reported pre-mitigation result was 10.6 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 Yukon-Koyukuk Census Area?
Yukon-Koyukuk Census Area borders 9 boroughs and census areas: Denali Borough, Northwest Arctic Borough, Fairbanks North Star Borough, Matanuska-Susitna Borough, Southeast Fairbanks Census Area, Nome Census Area, North Slope Borough, Kusilvak Census Area and Bethel Census Area.
Products
Yukon-Koyukuk Census Area, Products
Testing a home in Yukon-Koyukuk Census Area
No CDC figure names Yukon-Koyukuk Census Area; the nearest county with one, Fairbanks North Star Borough (149 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 Yukon-Koyukuk Census Area.
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
Monitor
RM-65 rechargeable radon detector with a color screen and alarm
- 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 Yukon-Koyukuk Census Area homes, compared
Explore
Yukon-Koyukuk Census Area, Bordering boroughs and census areas
Boroughs and census areas bordering Yukon-Koyukuk Census Area
Calculated by Radon41180.0%at or above 4 pCi/L
Median 5.8 pCi/L · 10 tests
- Radon levels in Denali BoroughEPA zone 3
50.0%at or above 4 pCi/L
Median 2.6 pCi/L · 2 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
- Radon levels in Nome Census AreaEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 2 tests
- Radon levels in Northwest Arctic BoroughEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
- Radon levels in North Slope BoroughEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
- Radon levels in Kusilvak Census AreaEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
- Radon levels in Bethel Census AreaEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
Yukon-Koyukuk Census Area, Cities and towns
Cities and towns in Yukon-Koyukuk Census Area
Yukon-Koyukuk Census Area has been losing residents: from 5,301 in 2020 to 5,028 on July 1, 2025, a fall of 5.1% by the Census Bureau's estimates. Spread over its land, that is 0.0 people to the square mile. No town dominates: Galena, the largest, has 450 residents, 8.9% of the total. Together its 18 incorporated places hold 68.9% of those residents; the other 31.1% live outside any of them. Testing is reported here more often than across the state: CDC's 6 reported tests for 2014 come to 1.2 for every 1,000 residents (2025 estimate), against 0.1 for Alaska.
From Galena to Bettles, CDC publishes no figure by town: each reads Yukon-Koyukuk Census Area's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Galena | 450 | −3.4% | 8.9% |
| Fort Yukon | 405 | −5.6% | 8.1% |
| Nenana | 333 | −5.7% | 6.6% |
| Huslia | 287 | −5.3% | 5.7% |
| McGrath | 278 | −6.1% | 5.5% |
| Tanana | 234 | −5.3% | 4.7% |
| Nulato | 222 | −5.1% | 4.4% |
| Grayling | 197 | −5.3% | 3.9% |
| Allakaket | 168 | −5.6% | 3.3% |
| Holy Cross | 167 | −5.6% | 3.3% |
| Kaltag | 151 | −5.6% | 3.0% |
| Ruby | 131 | −5.1% | 2.6% |
- Shageluk
- Koyukuk
- Hughes
- Nikolai
- Anvik
- Bettles
18 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).
Yukon-Koyukuk Census Area, Homes
Homes in Yukon-Koyukuk Census Area
Yukon-Koyukuk Census Area is a place of houses on their own lots: 96% of its 3,958 homes are detached single-family houses, against 63% across Alaska. Half of its homes were built before 1985, close to Alaska's 1985: 9% date from before 1960 and 16% from 2000 or later. 71% 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 | Yukon-Koyukuk Census Area | Alaska |
|---|---|---|
| Housing units | 3,958 | 327,610 |
| Detached houses | 96% | 63% |
| In buildings of 5 or more | 1% | 12% |
| Mobile homes | 1% | 4% |
| Built before 1960 | 9% | 8% |
| Built since 2000 | 16% | 25% |
| Middle year built | 1985 | 1985 |
| Owner-occupied | 71% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.