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 Dillingham Census Area, Alaska
EPA puts Dillingham Census Area in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
3.1%
Anchorage Municipality, 325 miles
- Anchorage Municipality
- 3.1%
- Alaska
- 11.5%
Share at 4+ pCi/L, 130 tests, 2022
Ground above low
99.4%
20.1 pts above Alaska
- Dillingham Census Area
- 99.4%
- Alaska
- 79.2%
Share of land USGS rates moderate or high potential
Tests reported
1
Too few for a share
- Dillingham Census Area
- 1
- Needed
- 30
2022
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 Dillingham 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
Dillingham Census Area, At a glance
Dillingham Census Area at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Moderate across 99% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Dillingham Census Area, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2021 | 0.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Dillingham Census Area 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: 2021 to 2022 (every CDC figure on file).
Dillingham Census Area, Compared
Dillingham Census Area radon figures, compared
Calculated by Radon411CDC's largest figure for Dillingham Census Area rests on 1 test in 2022, 0 of them at or above 4 pCi/L, so each test moves its share by 100.0 points and no rank or comparison is drawn from it. Results reached as high as 1.4 pCi/L, with a middle value of 1.4 pCi/L.
The nearest counties with a figure are Anchorage Municipality (325 miles away) at 3.1%, Matanuska-Susitna Borough (339 miles away) at 14.3% and Fairbanks North Star Borough (510 miles away) at 19.4%. 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 Dillingham Census Area in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 99% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Dillingham Census Area, Geology
The ground under Dillingham Census Area
PredictedUSGS's geologic map puts all of Dillingham Census Area's mapped land in one class: moderate radon potential. 99.2% of it lies in the area the map calls Central Alaska, to which USGS gives 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 | 99.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Dillingham Census Area beside the ground around it
Dillingham Census Area has more moderate-potential ground than Alaska as a whole: 99.4% of its land against 79.2%. Of the 2 boroughs and census areas that border it, none has as large a share of moderate-potential ground; Lake and Peninsula Borough comes nearest at 99.2%.
The map rates the ground, not the air in any home.
Local help
Dillingham Census Area, Local resources
Radon testing and mitigation in Dillingham 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
Dillingham Census Area, Questions
Questions about radon in Dillingham Census Area
Are radon levels high in Dillingham Census Area?
In 2022, 0.0% of the radon tests reported to CDC for Dillingham Census Area, Alaska were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.4 pCi/L. Of the 3 nearest counties with a figure, within 510 miles, the share of tests at or above 4 pCi/L runs from 3.1% to 19.4%.
Which counties border Dillingham Census Area?
Dillingham Census Area borders 2 boroughs and census areas: Lake and Peninsula Borough and Bethel Census Area.
Products
Dillingham Census Area, Products
Testing a home in Dillingham Census Area
No CDC figure names Dillingham Census Area; the nearest county with one, Anchorage Municipality (325 miles away), reported 3.1% 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 Dillingham 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
MonitorX-Sense
XR0B-SR battery digital radon monitor with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Best radon monitors for Dillingham Census Area homes, compared
Explore
Dillingham Census Area, Bordering boroughs and census areas
Boroughs and census areas bordering Dillingham Census Area
Calculated by Radon4110.0%at or above 4 pCi/L
Median 0.5 pCi/L · 1 test
- Radon levels in Bethel Census AreaEPA zone 3
No CDC figure for 2022; its page reads it against its own neighbours.
Dillingham Census Area, Cities and towns
Cities and towns in Dillingham Census Area
Dillingham Census Area has been losing residents: from 4,839 in 2020 to 4,483 on July 1, 2025, a fall of 7.4% by the Census Bureau's estimates. Spread over its land, that is 0.2 people to the square mile. Its largest town, Dillingham, has 2,075 residents, 46.3% of the total. Together its 7 incorporated places hold 91.7% of those residents; the other 8.3% live outside any of them. Reported testing is thin here: 1 test over 2022, or 0.2 for every 1,000 residents (2025 estimate), where Alaska as a whole comes to 0.4.
From Dillingham to Clark's Point, CDC publishes no figure by town: each reads Dillingham Census Area's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Dillingham | 2,075 | −7.5% | 46.3% |
| Togiak | 756 | −7.2% | 16.9% |
| New Stuyahok | 477 | −7.0% | 10.6% |
| Manokotak | 451 | −7.2% | 10.1% |
| Aleknagik | 193 | −7.2% | 4.3% |
| Ekwok | 99 | −7.5% | 2.2% |
| Clark's Point | 61 | −7.6% | 1.4% |
7 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).
Dillingham Census Area, Homes
Homes in Dillingham Census Area
Dillingham Census Area is a place of houses on their own lots: 82% of its 2,416 homes are detached single-family houses, against 63% across Alaska. Half of its homes were built before 1985, close to Alaska's 1985: 5% date from before 1960 and 18% from 2000 or later. 63% 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 | Dillingham Census Area | Alaska |
|---|---|---|
| Housing units | 2,416 | 327,610 |
| Detached houses | 82% | 63% |
| In buildings of 5 or more | 8% | 12% |
| Mobile homes | 1% | 4% |
| Built before 1960 | 5% | 8% |
| Built since 2000 | 18% | 25% |
| Middle year built | 1985 | 1985 |
| Owner-occupied | 63% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.