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 Kodiak Island Borough, Alaska
EPA puts Kodiak Island Borough in Zone 3, its lowest radon zone, and only 5 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
Nearest county
3.1%
Anchorage Municipality, 291 miles
- Anchorage Municipality
- 3.1%
- Alaska
- 11.5%
Share at 4+ pCi/L, 130 tests, 2022
Ground above low
23.2%
56.1 pts below Alaska
- Kodiak Island Borough
- 23.2%
- Alaska
- 79.2%
Share of land USGS rates moderate or high potential
Tests reported
10
Too few for a share
- Kodiak Island Borough
- 10
- Needed
- 30
2015
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 Kodiak Island 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
Kodiak Island Borough, At a glance
Kodiak Island Borough at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 65% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Kodiak Island Borough, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 33.3% |
| 2015 | 0.0% |
| 2017 | 50.0% |
| 2018 | 0.0% |
| 2021 | 0.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 5 tests were reported to CDC for Kodiak Island 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).
Kodiak Island Borough, Compared
Kodiak Island Borough radon figures, compared
Calculated by Radon411CDC's largest figure for Kodiak Island Borough rests on 10 tests in 2015, 0 of them at or above 4 pCi/L, so each test moves its share by 10.0 points and no rank or comparison is drawn from it. Results reached as high as 0.2 pCi/L, with a middle value of 0.2 pCi/L.
The nearest counties with a figure are Anchorage Municipality (291 miles away) at 3.1%, Matanuska-Susitna Borough (353 miles away) at 14.3% and Fairbanks North Star Borough (548 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 Kodiak Island Borough in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 65% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Kodiak Island Borough, Geology
The ground under Kodiak Island Borough
PredictedUSGS's geologic map splits Kodiak Island Borough: 64.8% of its land is low radon potential and 23.2% moderate. The map puts 64.8% of Kodiak Island Borough in the area it calls Pacific Border Ranges and 23.2% in Alaska-Aleutian Province. USGS gives the first a radon index of 7, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).
| 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 | 64.8% |
| Alaska-Aleutian Province | sedimentary and mafic volcanic rocks, glacial deposits; felsic intrusives; metamorphic rocks | Moderate | 9 | 23.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Kodiak Island Borough beside the ground around it
Alaska as a whole has more moderate-potential ground than Kodiak Island Borough: 79.2% of its land, against 23.2% here. Every one of the 2 boroughs and census areas that border it has more moderate-potential ground, Lake and Peninsula Borough the most at 99.2%.
The map rates the ground, not the air in any home.
Local help
Kodiak Island Borough, Local resources
Radon testing and mitigation in Kodiak Island 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
Kodiak Island Borough, Questions
Questions about radon in Kodiak Island Borough
Are radon levels high in Kodiak Island Borough?
In 2022, 0.0% of the radon tests reported to CDC for Kodiak Island Borough, Alaska were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.2 pCi/L. Of the 3 nearest counties with a figure, within 548 miles, the share of tests at or above 4 pCi/L runs from 3.1% to 19.4%.
Which counties border Kodiak Island Borough?
Kodiak Island Borough borders 2 boroughs and census areas: Lake and Peninsula Borough and Kenai Peninsula Borough.
Products
Kodiak Island Borough, Products
Testing a home in Kodiak Island Borough
No CDC figure names Kodiak Island Borough; the nearest county with one, Anchorage Municipality (291 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 Kodiak Island Borough.
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 Kodiak Island Borough homes, compared
Explore
Kodiak Island Borough, Bordering boroughs and census areas
Boroughs and census areas bordering Kodiak Island Borough
Calculated by Radon411- Radon levels in Kenai Peninsula BoroughEPA zone 2
8.3%at or above 4 pCi/L
Median 0.8 pCi/L · 24 tests
0.0%at or above 4 pCi/L
Median 0.5 pCi/L · 1 test
Kodiak Island Borough, Cities and towns
Cities and towns in Kodiak Island Borough
Kodiak Island Borough has been losing residents: from 13,046 in 2020 to 12,387 on July 1, 2025, a fall of 5.1% by the Census Bureau's estimates. Spread over its land, that is 1.9 people to the square mile. Its largest town, Kodiak, has 5,281 residents, 42.6% of the total. Together its 6 incorporated places hold 47.2% of those residents; the other 52.8% live outside any of them. Testing is reported here more often than across the state: CDC's 10 reported tests for 2015 come to 0.8 for every 1,000 residents (2025 estimate), against 0.1 for Alaska.
From Kodiak to Larsen Bay, CDC publishes no figure by town: each reads Kodiak Island Borough's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Kodiak | 5,281 | −5.0% | 42.6% |
| Old Harbor | 202 | −5.6% | 1.6% |
| Port Lions | 162 | −5.3% | 1.3% |
| Ouzinkie | 101 | −4.7% | 0.8% |
| Akhiok | 63 | −4.5% | 0.5% |
| Larsen Bay | 32 | −5.9% | 0.3% |
6 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).
Kodiak Island Borough, Homes
Homes in Kodiak Island Borough
Of Kodiak Island Borough's 5,840 homes, 63% are detached houses, against 63% across Alaska; 11% are in buildings of five or more homes. Half of its homes were built before 1985, close to Alaska's 1985: 9% date from before 1960 and 23% from 2000 or later. 61% 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 | Kodiak Island Borough | Alaska |
|---|---|---|
| Housing units | 5,840 | 327,610 |
| Detached houses | 63% | 63% |
| In buildings of 5 or more | 11% | 12% |
| Mobile homes | 4% | 4% |
| Built before 1960 | 9% | 8% |
| Built since 2000 | 23% | 25% |
| Middle year built | 1985 | 1985 |
| Owner-occupied | 61% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.