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 Kenai Peninsula Borough, Alaska
EPA puts Kenai Peninsula Borough in Zone 2, its middle radon zone, and only 24 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
Share at 4+ pCi/L
28.6%
6.1 pts above AK
- Kenai Peninsula Borough
- 28.6%
- Alaska
- 22.5%
35 tests, 2005 to 2014
Median result
1.7pCi/L
Below action level
- Kenai Peninsula Borough
- 1.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2005 to 2014
Tests reported
35
4th of 4 by tests
- Kenai Peninsula Borough
- 35
- Anchorage Municipality
- 294
Reported to CDC before any fix, 2005 to 2014
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Alaska
3 of 4
Middle half
- Kenai Peninsula Borough
- 28.6%
- Fairbanks North Star Borough
- 34.3%
By share, of 4 with 30+ tests
Read a result for Kenai Peninsula Borough
Starts at Kenai Peninsula Borough's median, 1.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.7 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. Kenai Peninsula Borough's median reported result, 2005 to 2014.
The data
Kenai Peninsula Borough, At a glance
Kenai Peninsula Borough at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Kenai Peninsula Borough is a
USGS geologic potential: Moderate across 58% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Kenai Peninsula Borough, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 0.0% |
| 2015 | 0.0% |
| 2016 | 20.0% |
| 2017 | 25.0% |
| 2019 | 10.0% |
| 2020 | 20.0% |
| 2021 | 18.2% |
| 2022 | 8.3% |
2022: 8.3%. Across these years the share ran from 0.0% to 25.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 24 tests were reported to CDC for Kenai Peninsula 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).
Kenai Peninsula Borough, Compared
Kenai Peninsula Borough radon figures, compared
Calculated by Radon411Kenai Peninsula Borough's 35 reported tests over the 2005 to 2014 laboratory totals had a middle value of 1.7 pCi/L and a maximum of 228.5 pCi/L, and 28.6% reached 4 pCi/L. Alaska as a whole (11 Alaska counties, pooled) comes to 22.5%: 6.1 points lower than here.
The newest figure, in 2022, counts only 24 tests (8.3% at or above 4 pCi/L), too few to compare, so this reading uses the 35-test figure.
Among its state's counties it ranks 3rd of 4 Alaska counties with 30 or more tests for the same period. Statewide for the same period, Fairbanks North Star Borough reported the highest share (34.3%) and Anchorage Municipality the lowest (9.9%).
Below the action level, 18 tests (51.4%) came in under 2 pCi/L, against 60.1% statewide, and 7 tests (20.0%) fell between 2 and 4, against 17.4% statewide. The busiest year on file was 2019, with 30 tests reported; the quietest, 2015, had 2.
EPA's 1993 zone map puts Kenai Peninsula Borough in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 58% of the county's land moderate radon potential.
Next door, the shares run from 9.9% in Anchorage Municipality to 29.5% in Matanuska-Susitna Borough, with Anchorage Municipality below Kenai Peninsula Borough.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Kenai Peninsula Borough, Geology
The ground under Kenai Peninsula Borough
PredictedUSGS's geologic map splits Kenai Peninsula Borough: 58.2% of its land is moderate radon potential and 40.2% low. The map puts 40.2% of Kenai Peninsula Borough in the area it calls Pacific Border Ranges and 38.5% in Alaska-Aleutian Province, with one smaller area beside them. 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 | 40.2% |
| Alaska-Aleutian Province | sedimentary and mafic volcanic rocks, glacial deposits; felsic intrusives; metamorphic rocks | Moderate | 9 | 38.5% |
| Coastal Trough | marine and continental sedimentary rocks; Tertiary volcanic rocks | Moderate | 9 | 19.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Kenai Peninsula Borough beside the ground around it
Alaska as a whole has more moderate-potential ground than Kenai Peninsula Borough: 79.2% of its land, against 58.2% here. Of the 6 boroughs and census areas that border it, 3 have 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
Kenai Peninsula Borough, Local resources
Radon testing and mitigation in Kenai Peninsula 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
Kenai Peninsula Borough, Questions
Questions about radon in Kenai Peninsula Borough
Are radon levels high in Kenai Peninsula Borough?
In 2022, 8.3% of the radon tests reported to CDC for Kenai Peninsula Borough, Alaska were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.8 pCi/L. Of 4 Alaska counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 22.5%.
Which counties border Kenai Peninsula Borough?
Kenai Peninsula Borough borders 6 boroughs and census areas: Anchorage Municipality, Matanuska-Susitna Borough, Kodiak Island Borough, Lake and Peninsula Borough, Valdez-Cordova Census Area and Bethel Census Area.
Products
Kenai Peninsula Borough, Products
Testing a home in Kenai Peninsula Borough
In Kenai Peninsula Borough, 28.6% of 35 tests reported to CDC over the 2005 to 2014 laboratory totals reached 4 pCi/L, against 22.5% pooled across Alaska. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Kenai Peninsula Borough; a long-term test tells the year-round average.
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
Monitor
EcoBlu plug-in digital radon monitor with a display
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Best radon monitors for Kenai Peninsula Borough homes, compared
Explore
Kenai Peninsula Borough, Bordering boroughs and census areas
Boroughs and census areas bordering Kenai Peninsula Borough
Calculated by Radon411- Radon levels in Kodiak Island BoroughEPA zone 3
42.9%at or above 4 pCi/L
Median 3.1 pCi/L · 7 tests · 14.3 points above Kenai Peninsula Borough
29.5%at or above 4 pCi/L
Median 2.1 pCi/L · 61 tests · 0.9 points above Kenai Peninsula Borough
- Radon levels in Anchorage MunicipalityEPA zone 3
9.9%at or above 4 pCi/L
Median 1.1 pCi/L · 294 tests · 18.7 points below Kenai Peninsula Borough
0.0%at or above 4 pCi/L
Median 1.6 pCi/L · 2 tests · 28.6 points below Kenai Peninsula Borough
No CDC figure for 2005 to 2014; its page reads it against its own neighbours.
- Radon levels in Bethel Census AreaEPA zone 3
No CDC figure for 2005 to 2014; its page reads it against its own neighbours.
Kenai Peninsula Borough, Cities and towns
Cities and towns in Kenai Peninsula Borough
Kenai Peninsula Borough is growing: the Census Bureau puts it at 61,951 residents on July 1, 2025, up 5.1% from 58,939 in 2020. Spread over its land, that is 3.9 people to the square mile. No town dominates: Kenai, the largest, has 7,924 residents, 12.8% of the total. Together its 6 incorporated places hold 36.5% of those residents; the other 63.5% live outside any of them. Reported testing is thin here: 35 tests over 2005 to 2014, or 0.6 for every 1,000 residents (2025 estimate), where Alaska as a whole comes to 0.9.
From Kenai to Seldovia, CDC publishes no figure by town: each reads Kenai Peninsula Borough's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Kenai | 7,924 | +6.5% | 12.8% |
| Homer | 6,331 | +14.1% | 10.2% |
| Soldotna | 4,615 | +5.8% | 7.4% |
| Seward | 2,892 | +5.7% | 4.7% |
| Kachemak | 589 | +3.3% | 1.0% |
| Seldovia | 251 | +6.8% | 0.4% |
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).
Kenai Peninsula Borough, Homes
Homes in Kenai Peninsula Borough
Kenai Peninsula Borough is a place of houses on their own lots: 82% of its 32,707 homes are detached single-family houses, against 63% across Alaska. Half of its homes were built before 1989, close to Alaska's 1985: 5% date from before 1960 and 33% from 2000 or later. Owners live in 77% of the occupied homes (Alaska: 67%), so for most households a test and a fix are their own to order.
| Homes | Kenai Peninsula Borough | Alaska |
|---|---|---|
| Housing units | 32,707 | 327,610 |
| Detached houses | 82% | 63% |
| In buildings of 5 or more | 5% | 12% |
| Mobile homes | 4% | 4% |
| Built before 1960 | 5% | 8% |
| Built since 2000 | 33% | 25% |
| Middle year built | 1989 | 1985 |
| Owner-occupied | 77% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.