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 Teton County, Idaho
EPA puts Teton County in Zone 2, its middle radon zone, and high results are common there: 53.3% of the 473 radon tests reported to CDC (2008 to 2017, laboratory totals) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
53.3%
11.8 pts above ID
- Teton
- 53.3%
- Idaho
- 41.5%
473 tests, 2008 to 2017
Median result
4.4pCi/L
Action level reached
- Teton
- 4.4 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
473
6th of 37 by tests
- Teton
- 473
- Ada
- 3,030
Reported to CDC before any fix, 2008 to 2017
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 Idaho
10 of 37
Middle half
- Teton
- 53.3%
- Bear Lake
- 78.1%
By share, of 37 with 30+ tests
Read a result for Teton County
Starts at Teton County's median, 4.4 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.4 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. Teton County's median reported result, 2008 to 2017.
The data
Teton County, At a glance
Teton County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Teton County is a
USGS geologic potential: Moderate across 60% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Teton County, 2008 to 2017, laboratory
Under 2 pCi/L: 30%2 to 4 pCi/L: 17%4 pCi/L and above: 53%
Of 473 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 139 | 29.4% |
| 2 to 4 pCi/L | 82 | 17.3% |
| 4 pCi/L and above | 252 | 53.3% |
What these figures count
These are the 473 tests reported to CDC for Teton County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Teton County, Compared
Teton County radon figures, compared
Calculated by Radon411More than half: 53.3% of the 473 radon tests reported to CDC for Teton County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 10th of 37 Idaho counties with 30 or more tests for the same period. That is 11.8 points above the 41.5% pooled from 44 Idaho counties.
The median result, 4.4 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 197.7 pCi/L. The rest split 29.4% under 2 pCi/L and 17.3% from 2 to 4 (Idaho: 31.5% and 26.9%). The reported tests do not follow EPA's Zone 2 label for Teton County (predicted average between 2 and 4 pCi/L): 53.3% of them reached 4 pCi/L, fewer than that label suggests.
1 of its 4 bordering counties with figures ran higher, led by Madison County at 63.7%; Bonneville County reported 40.1%. Statewide for the same period, Bear Lake County reported the highest share (78.1%) and Payette County the lowest (4.9%).
CDC's ten-year totals for Teton County went from 224 tests (2005 to 2014) to 473 (2008 to 2017), the share going from 55.4% to 53.3%.
Nationally, every county with a figure for the same period pools to 35.7%; Teton County sits 17.6 points above it. CDC also counts 36 tests taken after mitigation in Teton County for the same period: tests in homes where a fix was already in.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Teton County, Geology
The ground under Teton County
PredictedUSGS's geologic map splits Teton County: 60.3% of its land is moderate radon potential and 39.7% high. The map puts 60.3% of Teton County in the area it calls Middle Rocky Mountain province and 39.7% in Middle Rocky Mts./Yellowstone. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Middle Rocky Mountain province | Complexly folded, faulted, and metamorphosed rocks of volcanic origin. | Moderate | 11 | 60.3% |
| Middle Rocky Mts./Yellowstone | Extrusive volcanics, rhyolite flows, variable composition. | High | 12 | 39.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Teton County beside the ground around it
Idaho as a whole has more high-potential ground than Teton County: 50.7% of its land, against 39.7% here. Of the 4 counties that border it, 3 have more high-potential ground, Fremont County the most at 68.2%.
The map rates the ground, not the air in any home.
Local help
Teton County, Local resources
Radon testing and mitigation in Teton County
- DHW Environmental Health ProgramDHW Environmental Health Program, run by Idaho Department of Health and Welfare, offers free or discounted test kits, and answers questions about testing and mitigation in Idaho.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Order a free radon test kit.
- Compare kits
- See the Idaho directoryNo professionals are listed in Idaho yet. The state program can point you to registered testers and mitigators.
What Idaho's program says
- Phone
- 800-445-8647
- radon@dhw.idaho.gov
What it means
Teton County, Questions
Questions about radon in Teton County
Are radon levels high in Teton County?
Over the 2008 to 2017 laboratory totals, 53.3% of the radon tests reported to CDC for Teton County, Idaho were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.4 pCi/L. Of 37 Idaho counties with 30 or more tests for the same period, 9 reported a higher share; pooled, the state comes to 41.5%.
Which counties border Teton County?
Teton County borders 4 counties: Madison County, ID, Bonneville County, ID, Teton County, WY and Fremont County, ID.
Products
Teton County, Products
Testing a home in Teton County
In Teton County, 53.3% of 473 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 41.5% pooled across Idaho. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Teton County; a long-term test tells the year-round average.
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
View Radon Wi-Fi radon monitor with an e-paper display
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Teton County, Bordering counties
Counties bordering Teton County
Calculated by Radon411- Radon levels in Madison County, IDEPA zone 2
63.7%at or above 4 pCi/L
Median 6.2 pCi/L · 314 tests · 10.4 points above Teton County
- Radon levels in Fremont County, IDEPA zone 1
49.5%at or above 4 pCi/L
Median 3.9 pCi/L · 101 tests · 3.8 points below Teton County
- Radon levels in Teton County, WYEPA zone 1
44.6%at or above 4 pCi/L
Median 3.4 pCi/L · 278 tests · 8.7 points below Teton County
- Radon levels in Bonneville County, IDEPA zone 2
40.1%at or above 4 pCi/L
Median 3.4 pCi/L · 1,117 tests · 13.2 points below Teton County
Teton County, Cities and towns
Cities and towns in Teton County
Teton County is growing: the Census Bureau puts it at 13,254 residents on July 1, 2025, up 12.9% from 11,740 in 2020. That works out to 30 people per square mile of land. No town dominates: Victor, the largest, has 2,589 residents, 19.5% of the total. Together its 3 incorporated places hold 39.7% of those residents; the other 60.3% live outside any of them. Testing is reported here more often than across the state: CDC's 473 reported tests for 2008 to 2017 come to 35.7 for every 1,000 residents (2025 estimate), against 6.4 for Idaho.
From Victor to Tetonia, CDC publishes no figure by town: each reads Teton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Victor | 2,589 | +19.3% | 19.5% |
| Driggs | 2,403 | +17.9% | 18.1% |
| Tetonia | 274 | −12.5% | 2.1% |
3 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).
Teton County, Homes
Homes in Teton County
Of Teton County's 6,199 homes, 73% are detached houses, against 74% across Idaho; 7% are in buildings of five or more homes. Much of Teton County is recent building: 54% of its homes have gone up since 2000 and the middle year built is 2001, against 1990 for Idaho. Owners live in 80% of the occupied homes (Idaho: 72%), so for most households a test and a fix are their own to order.
| Homes | Teton County | Idaho |
|---|---|---|
| Housing units | 6,199 | 776,683 |
| Detached houses | 73% | 74% |
| In buildings of 5 or more | 7% | 9% |
| Mobile homes | 5% | 7% |
| Built before 1960 | 6% | 18% |
| Built since 2000 | 54% | 35% |
| Middle year built | 2001 | 1990 |
| Owner-occupied | 80% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.