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 Wallowa County, Oregon
EPA puts Wallowa County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
39.1%
Union County
- Union
- 39.1%
1 of 9 neighbours have 30+ tests, 2016
Nearest county
39.1%
Union County, 44 miles
- Union
- 39.1%
- Oregon
- 21.5%
Share at 4+ pCi/L, 64 tests, 2016
Ground above low
100.0%
37.7 pts above Oregon
- Wallowa
- 100.0%
- Oregon
- 62.3%
Share of land USGS rates moderate or high potential
Tests reported
15
Too few for a share
- Wallowa
- 15
- Needed
- 30
2008 to 2017, laboratory
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 Wallowa County
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
Wallowa County, At a glance
Wallowa County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Wallowa County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2015 | 14.3% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2018 | 66.7% |
| 2019 | 50.0% |
| 2020 | 25.0% |
| 2021 | 41.7% |
| 2022 | 25.0% |
| 2023 | 0.0% |
2023: 0.0%. Across these years the share ran from 0.0% to 66.7%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Wallowa County over 2023, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Wallowa County, Compared
Wallowa County radon figures, compared
Calculated by Radon411CDC's largest figure for Wallowa County rests on 15 tests over the 2008 to 2017 laboratory totals, 4 of them at or above 4 pCi/L, so each test moves its share by 6.7 points and no rank or comparison is drawn from it. Results reached as high as 9.7 pCi/L, with a middle value of 1.1 pCi/L.
Union County, the one bordering county with a figure in 2016, reported 39.1% of its tests at or above 4 pCi/L. Farther out, Wasco County (196 miles away) at 10.0%, Hood River County (217 miles away) at 20.8% and Deschutes County (230 miles away) at 6.7% have figures too. Pooled across 35 Oregon counties, 21.5% of reported tests reached that level; across every county in the country with a figure, 31.2%.
Statewide for the same period, Union County reported the highest share (39.1%) and Deschutes County the lowest (6.7%). EPA's 1993 map puts Wallowa County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Wallowa County, Geology
The ground under Wallowa County
PredictedUSGS's geologic map puts all of Wallowa County's mapped land in one class: moderate radon potential. The map puts 73.3% of Wallowa County in the area it calls Blue Mountains and 26.6% in Snake River Canyon. USGS gives both a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Blue Mountains | Tertiary basalt and andesite, tuffaceous sedimentary rocks, and tuff. | Moderate | 9 | 73.3% |
| Snake River Canyon | Cenozoic basalt and andesite flows and minor continental sedimentary rocks. | Moderate | 9 | 26.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Wallowa County beside the ground around it
Wallowa County has more moderate-potential ground than Oregon as a whole: 100% of its land against 62.3%. Of the 9 counties that border it, 2 have more high-potential ground, Idaho County, ID the most at 79.3%.
The map rates the ground, not the air in any home.
Local help
Wallowa County, Local resources
Radon testing and mitigation in Wallowa County
- Oregon Radon Awareness ProgramOregon Radon Awareness Program, run by Oregon Health Authority, offers free or discounted test kits, and answers questions about testing and mitigation in Oregon.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Oregon Radon Awareness Program provides a FREE short-term radon test kit to those living in areas of Oregon where little radon testing has been done.
- Compare kits
- Professionals in Oregon38 professionals are listed in Oregon.
What Oregon's program says
- Radon.program@dhsoha.state.or.us
What it means
Wallowa County, Questions
Questions about radon in Wallowa County
Are radon levels high in Wallowa County?
In 2023, 0.0% of the radon tests reported to CDC for Wallowa County, Oregon were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Union County, the one bordering county with a figure in 2016, reported 39.1% of its tests at or above 4 pCi/L.
Which counties border Wallowa County?
Wallowa County borders 9 counties: Asotin County, WA, Union County, OR, Nez Perce County, ID, Adams County, ID, Garfield County, WA, Columbia County, WA, Baker County, OR, Umatilla County, OR and Idaho County, ID.
Products
Wallowa County, Products
Testing a home in Wallowa County
No CDC figure names Wallowa County; the nearest county with one, Union County (44 miles away), reported 39.1% of its tests at or above 4 pCi/L in 2016, 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 Wallowa County.
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
MonitorAEGTEST
HOUND-1085 palm-sized rechargeable radon detector
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Wallowa County, Bordering counties
Counties bordering Wallowa County
Calculated by Radon411- Radon levels in Asotin County, WAEPA zone 2
100.0%at or above 4 pCi/L
Median 5.1 pCi/L · 1 test
- Radon levels in Union County, OREPA zone 2
39.1%at or above 4 pCi/L
Median 3.3 pCi/L · 64 tests
- Radon levels in Baker County, OREPA zone 2
33.3%at or above 4 pCi/L
Median 2.0 pCi/L · 3 tests
- Radon levels in Umatilla County, OREPA zone 2
20.0%at or above 4 pCi/L
Median 1.8 pCi/L · 10 tests
- Radon levels in Nez Perce County, IDEPA zone 3
No CDC figure for 2016; its page reads it against its own neighbours.
- Radon levels in Adams County, IDEPA zone 3
No CDC figure for 2016; its page reads it against its own neighbours.
- Radon levels in Garfield County, WAEPA zone 2
No CDC figure for 2016; its page reads it against its own neighbours.
- Radon levels in Columbia County, WAEPA zone 2
No CDC figure for 2016; its page reads it against its own neighbours.
- Radon levels in Idaho County, IDEPA zone 1
No CDC figure for 2016; its page reads it against its own neighbours.
Wallowa County, Cities and towns
Cities and towns in Wallowa County
The Census Bureau estimates 7,595 residents in Wallowa County for July 1, 2025, 192 more than in 2020 (+2.6%). Spread over its land, that is 2.4 people to the square mile. Its largest town, Enterprise, has 2,103 residents, 27.7% of the total. Together its 4 incorporated places hold 57.4% of those residents; the other 42.6% live outside any of them. Reported testing is thin here: 15 tests over 2008 to 2017, or 2.0 for every 1,000 residents (2025 estimate), where Oregon as a whole comes to 5.6.
From Enterprise to Lostine, CDC publishes no figure by town: each reads Wallowa County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Enterprise | 2,103 | +2.4% | 27.7% |
| Joseph | 1,188 | +2.6% | 15.6% |
| Wallowa | 819 | +2.8% | 10.8% |
| Lostine | 247 | +3.3% | 3.3% |
4 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).
Wallowa County, Homes
Homes in Wallowa County
Wallowa County is a place of houses on their own lots: 79% of its 4,334 homes are detached single-family houses, against 63% across Oregon. Half of its homes were built before 1974, close to Oregon's 1980: 39% date from before 1960 and 21% from 2000 or later. Owners live in 76% of the occupied homes (Oregon: 63%), so for most households a test and a fix are their own to order.
| Homes | Wallowa County | Oregon |
|---|---|---|
| Housing units | 4,334 | 1,838,631 |
| Detached houses | 79% | 63% |
| In buildings of 5 or more | 5% | 17% |
| Mobile homes | 11% | 8% |
| Built before 1960 | 39% | 23% |
| Built since 2000 | 21% | 24% |
| Middle year built | 1974 | 1980 |
| Owner-occupied | 76% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.