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 Jackson County, Oregon
EPA puts Jackson County in Zone 3, its lowest radon zone, and 16.3% of its 49 reported radon tests (2023) were 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
16.3%
2.6 pts below OR
- Jackson
- 16.3%
- Oregon
- 18.9%
49 tests, 2023
Median result
0.7pCi/L
Below action level
- Jackson
- 0.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
49
8th of 14 by tests
- Jackson
- 49
- Multnomah
- 792
Reported to CDC before any fix, 2023
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Oregon
5 of 14
Middle half
- Jackson
- 16.3%
- Hood River
- 39.0%
By share, of 14 with 30+ tests
Read a result for Jackson County
Starts at Jackson County's median, 0.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.7 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. Jackson County's median reported result, 2023.
The data
Jackson County, At a glance
Jackson County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Jackson County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 13.8% |
| 2015 | 16.2% |
| 2016 | 16.0% |
| 2017 | 13.9% |
| 2018 | 8.5% |
| 2019 | 6.3% |
| 2020 | 15.0% |
| 2021 | 6.8% |
| 2022 | 15.1% |
| 2023 | 16.3% |
2023: 16.3%. Across these years the share ran from 6.3% to 16.3%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 49 tests reported to CDC for Jackson County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Jackson County, Compared
Jackson County radon figures, compared
Calculated by Radon411Jackson County's 49 reported tests in 2023 had a middle value of 0.7 pCi/L and a maximum of 21.5 pCi/L, and 16.3% reached 4 pCi/L. Oregon as a whole (28 Oregon counties, pooled) comes to 18.9%: 2.6 points higher than here.
Among its state's counties it ranks 5th of 14 Oregon counties with 30 or more tests for the same period. Statewide for the same period, Hood River County reported the highest share (39.0%) and Deschutes County the lowest (1.7%).
Below the action level, 34 tests (69.4%) came in under 2 pCi/L, against 59.5% statewide, and 7 tests (14.3%) fell between 2 and 4, against 21.6% statewide. The busiest year on file was 2022, with 258 tests reported; the quietest, 2016, had 25.
EPA's 1993 zone map puts Jackson County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Douglas County, the one bordering county with a figure for the same period, reported 33.3%. Over 8 years of annual figures the share held within 2 points, from 16.2% in 2015 to 16.3% in 2023; its peak was 16.3% in 2023.
Jackson CountyOregon, pooled
| Year | Tests | Jackson County, at or above 4 pCi/L | Oregon, pooled |
|---|---|---|---|
| 2015 | 37 | 16.2% | 27.4% |
| 2017 | 36 | 13.9% | 19.2% |
| 2018 | 71 | 8.5% | 19.6% |
| 2019 | 64 | 6.3% | 20.2% |
| 2020 | 153 | 15.0% | 16.8% |
| 2021 | 132 | 6.8% | 16.3% |
| 2022 | 258 | 15.1% | 20.2% |
| 2023 | 49 | 16.3% | 18.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Jackson County, Geology
The ground under Jackson County
PredictedUSGS's geologic map puts all of Jackson County's mapped land in one class: low radon potential. The map puts 64.8% of Jackson County in the area it calls Cascade Range and 35.1% in Klamath Mountains. USGS gives both a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Cascade Range | Western Cascade Range is Tertiary andesite, basalt flows, and pyroclastic rocks. Eastern Cascades are late Tertiary to Quaternary basaltic and andesitic volcanic rocks. | Low | 7 | 64.8% |
| Klamath Mountains | Triassic to Jurassic metamorphic, volcanic, and sedimentary rocks with some Cretaceous intrusive igneous rocks. | Low | 7 | 35.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jackson County beside the ground around it
Across Oregon 62.3% of the land is rated moderate; none of Jackson County's is. Of the 4 counties that border it, 2 have more moderate-potential ground, Klamath County the most at 71.6%.
The map rates the ground, not the air in any home.
Local help
Jackson County, Local resources
Radon testing and mitigation in Jackson 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
Jackson County, Questions
Questions about radon in Jackson County
Are radon levels high in Jackson County?
In 2023, 16.3% of the radon tests reported to CDC for Jackson County, Oregon were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.7 pCi/L. Of 14 Oregon counties with 30 or more tests for the same period, 4 reported a higher share; pooled, the state comes to 18.9%.
Which counties border Jackson County?
Jackson County borders 4 counties: Josephine County, OR, Klamath County, OR, Douglas County, OR and Siskiyou County, CA.
Products
Jackson County, Products
Testing a home in Jackson County
In Jackson County, 16.3% of 49 tests reported to CDC in 2023 reached 4 pCi/L, against 18.9% pooled across Oregon. 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 Jackson 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
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
Explore
Jackson County, Bordering counties
Counties bordering Jackson County
Calculated by Radon411- Radon levels in Douglas County, OREPA zone 3
33.3%at or above 4 pCi/L
Median 1.8 pCi/L · 33 tests · 17.0 points above Jackson County
- Radon levels in Klamath County, OREPA zone 2
15.4%at or above 4 pCi/L
Median 1.4 pCi/L · 13 tests · 0.9 points below Jackson County
- Radon levels in Josephine County, OREPA zone 3
0.0%at or above 4 pCi/L
Median 2.2 pCi/L · 6 tests · 16.3 points below Jackson County
- Radon levels in Siskiyou County, CAEPA zone 3
No CDC figure for 2023; its page reads it against its own neighbours.
Jackson County, Cities and towns
Cities and towns in Jackson County
About 221,795 people live in Jackson County by the Census Bureau's estimate for July 1, 2025, 1,958 fewer than in 2020 (−0.9%). That works out to 80 people per square mile of land. Its largest town, Medford, has 86,494 residents, 39.0% of the total. Together its 11 incorporated places hold 71.1% of those residents; the other 28.9% live outside any of them. Reported testing is thin here: 49 tests over 2023, or 0.2 for every 1,000 residents (2025 estimate), where Oregon as a whole comes to 0.5.
From Medford to Butte Falls, CDC publishes no figure by town: each reads Jackson County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Medford | 86,494 | +0.2% | 39.0% |
| Ashland | 20,889 | −2.3% | 9.4% |
| Central Point | 19,139 | +0.3% | 8.6% |
| Eagle Point | 9,861 | +1.5% | 4.4% |
| Talent | 6,296 | −0.3% | 2.8% |
| Phoenix | 4,920 | +8.6% | 2.2% |
| Shady Cove | 3,039 | −1.6% | 1.4% |
| Jacksonville | 2,972 | −2.5% | 1.3% |
| Rogue River | 2,293 | −3.9% | 1.0% |
| Gold Hill | 1,317 | −1.7% | 0.6% |
| Butte Falls | 433 | −2.3% | 0.2% |
11 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).
Jackson County, Homes
Homes in Jackson County
Of Jackson County's 97,083 homes, 65% are detached houses, against 63% across Oregon; 11% are mobile homes. Half of its homes were built before 1984, close to Oregon's 1980: 18% date from before 1960 and 26% from 2000 or later. 65% of occupied homes are lived in by their owner (Oregon: 63%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Jackson County | Oregon |
|---|---|---|
| Housing units | 97,083 | 1,838,631 |
| Detached houses | 65% | 63% |
| In buildings of 5 or more | 11% | 17% |
| Mobile homes | 11% | 8% |
| Built before 1960 | 18% | 23% |
| Built since 2000 | 26% | 24% |
| Middle year built | 1984 | 1980 |
| Owner-occupied | 65% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.