Locations and reports
Radon in Jackson, Wyoming
EPA puts Teton County, where Jackson is, in Zone 1, its highest radon zone, and high results are common there: 44.6% of the 278 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
44.6%
0.3 pts above WY
- Teton
- 44.6%
- Wyoming
- 44.3%
Teton, 11th of 22 in WY, 2008 to 2017
Median result
3.4pCi/L
Below action level
- Teton
- 3.4 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Teton's tests, 2008 to 2017
Nearest county
50.0%
Sublette, 65 miles
- Sublette
- 50.0%
- Teton
- 44.6%
60 tests, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
Teton, where Jackson is
Tests reported
278
In Teton
- Teton
- 278
- Sublette
- 60
Reported to CDC before any fix, 2008 to 2017
Read a result for Jackson
Starts at Teton County's median, 3.4 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.4 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Teton County's median reported result, 2008 to 2017.
The data
Jackson, What is published
What is published for Jackson
Every figure for Jackson is a county's
Radon data is published by county, not by city, so for Jackson it is Teton County's: its EPA zone (Zone 1) and the 278 tests reported to CDC for 2008 to 2017, laboratory. Only a test tells you about one home.
Jackson covers 3 square miles of land, all of it in Teton County. About 10,720 people live there, 3,620 to the square mile.
Jackson, Counties
The county Jackson lies in
MeasuredTeton County's EPA zone and the figures CDC publishes for it, 2008 to 2017, laboratory.
Teton CountyZone 1Highest predicted potential
- 44.6%
- Reported tests at or above 4 pCi/L
- 3.4 pCi/L
- Median reported result
- 278 tests
- Tests reported to CDC
- None
- Yearly figures on file
Teton County ranks 11th of 22 Wyoming counties with 30 or more tests for that period, 0.3 points above the 44.3% pooled across Wyoming's counties, 8.9 points above the national pool of 35.7%.
Measured from the middle of Jackson, the nearest counties with a CDC figure for 2008 to 2017, laboratory are Sublette County (65 miles, 50.0% of 60 tests), Lincoln County (84 miles, 68.3% of 142 tests) and Park County (93 miles, 42.8% of 505 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 24.6% to 68.3%; the farthest of them, Washakie County, is 158 miles away at 38.5%.
No business in the directory gives Jackson as its address; the Wyoming list covers it.
The counties around Jackson
By distance from the middle of Jackson; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2008 to 2017, laboratory.
Jackson, Geology
The ground under Jackson
PredictedUSGS's geologic map puts all of Jackson's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Overthrust Belt, 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 |
|---|---|---|---|---|
| Overthrust Belt | Late Paleozoic sedimentary or Precambrian igneous rocks. | Moderate | 11 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jackson beside its county and Wyoming
Teton County as a whole has 41.7% of its land rated high; none of that ground lies under Jackson. Across Wyoming 72.4% of the land is rated high; none of Jackson's is.
The map rates the ground, not the air in any home.
Jackson, Homes
Homes in Jackson
Fewer than six in ten of Jackson's 5,146 homes are detached houses (33%, against 62% across Teton County); the rest are attached, in shared buildings or mobile. Half of its homes were built before 1991, close to Teton County's 1989: 8% date from before 1960 and 30% from 2000 or later. Most occupied homes here are rented: owners live in 46% (Teton County: 62%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Jackson | Teton County | Wyoming |
|---|---|---|---|
| Housing units | 5,146 | 13,503 | 275,131 |
| Detached houses | 33% | 62% | 68% |
| In buildings of 5 or more | 24% | 15% | 9% |
| Mobile homes | 3% | 3% | 12% |
| Built before 1960 | 8% | 11% | 24% |
| Built since 2000 | 30% | 25% | 24% |
| Middle year built | 1991 | 1989 | 1980 |
| Owner-occupied | 46% | 62% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Jackson, Local resources
Local resources for Jackson
Who to ask in Wyoming: its radon program, test kits and professionals.
- Wyoming Radon ProgramRun by Wyoming Department of Health.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
- Professionals in WyomingRadon testers and mitigators in Wyoming, each with how its listing was checked.
What it means
Jackson, Questions
Questions about radon in Jackson
What radon zone is Jackson in?
EPA's map puts Teton County, and with it Jackson, in Zone 1, the map's highest class: a predicted county average above 4 pCi/L.
What are radon levels in Jackson?
High results are ordinary around Jackson: 44.6% of the 278 tests reported from Teton County for 2008 to 2017 (laboratory totals) were at or above 4 pCi/L, the level at which EPA says to fix a home. The median reported result was 3.4 pCi/L.
Should I test my home in Jackson?
Yes. Teton County reported about 124 of its 278 tests at or above 4 pCi/L. That is about what Wyoming as a whole reports (44.3%), and ranks Teton County 11th of the 22 Wyoming counties with 30 or more tests. Which homes they were, no map can say. How to test a home.
What ground is Jackson built on, as far as radon goes?
USGS's geologic map puts all of Jackson on one named area, "Overthrust Belt", rated moderate for radon potential, radon index 11.
Is radon higher in the counties around Jackson?
It depends which way you go. 4 of the 8 nearest counties with a figure report a larger share than Teton County's 44.6% and 4 a smaller one: from Uinta County (24.6%, 151 miles off) to Lincoln County (68.3%, 84 miles off).
The answers use the published figures of Teton County, the county Jackson lies in.
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