Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Linn County, Oregon
EPA puts Linn County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 4.9% of 41 (2023) reached 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
4.9%
14.0 pts below OR
- Linn
- 4.9%
- Oregon
- 18.9%
41 tests, 2023
Median result
0.8pCi/L
Below action level
- Linn
- 0.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
41
10th of 14 by tests
- Linn
- 41
- 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
13 of 14
Lowest quarter
- Linn
- 4.9%
- Hood River
- 39.0%
By share, of 14 with 30+ tests
Read a result for Linn County
Starts at Linn County's median, 0.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 0.8 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. Linn County's median reported result, 2023.
The data
Linn County, At a glance
Linn County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 77% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Linn County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 8.7% |
| 2015 | 5.1% |
| 2016 | 9.4% |
| 2017 | 10.3% |
| 2018 | 8.7% |
| 2019 | 5.6% |
| 2020 | 12.3% |
| 2021 | 11.3% |
| 2022 | 0.0% |
| 2023 | 4.9% |
2023: 4.9%. Across these years the share ran from 0.0% to 12.3%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 41 tests reported to CDC for Linn 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).
Linn County, Compared
Linn County radon figures, compared
Calculated by Radon411Only 2 of 41 radon tests reported for Linn County in 2023 reached 4 pCi/L (4.9%). The median result, 0.8 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 5.2 pCi/L.
Across 28 Oregon counties pooled together, 18.9% of tests reached that level, so Linn County runs 14.0 points below its state. Against the national pool of 33.4%, the gap is 28.5 points lower. Its place in the state: 13th of 14 Oregon counties with 30 or more tests for the same period.
Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 4.9% share point the same way here. Of 5 neighbours with a figure, 4 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 1.7% (Deschutes County) to 16.0% (Marion County).
Below the action level, 34 tests (82.9%) came in under 2 pCi/L, against 59.5% statewide, and 5 tests (12.2%) fell between 2 and 4, against 21.6% statewide. Over 8 years of annual figures the share held within 2 points, from 5.1% in 2015 to 4.9% in 2023; its peak was 12.3% in 2020. USGS geology rates 77% of the county's land low radon potential.
The busiest year on file was 2020, with 65 tests reported; the quietest, 2014, had 23.
Linn CountyOregon, pooled
4.9% % of tests18.9% % of tests
| Year | Tests | Linn County, at or above 4 pCi/L | Oregon, pooled |
|---|---|---|---|
| 2015 | 39 | 5.1% | 27.4% |
| 2016 | 53 | 9.4% | 21.5% |
| 2018 | 46 | 8.7% | 19.6% |
| 2019 | 54 | 5.6% | 20.2% |
| 2020 | 65 | 12.3% | 16.8% |
| 2021 | 53 | 11.3% | 16.3% |
| 2022 | 30 | 0.0% | 20.2% |
| 2023 | 41 | 4.9% | 18.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Linn County, Geology
The ground under Linn County
PredictedMost of the ground under Linn County is one class on USGS's geologic map: 76.6% of its land is low radon potential, with 23.4% moderate. The map puts 76.6% of Linn County in the area it calls Cascade Range and 23.4% in Wilamette Valley. 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 |
|---|---|---|---|---|
| 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 | 76.6% |
| Wilamette Valley | Gravelly to clayey alluvium with moderately elevated uranium content. | Moderate | 9 | 23.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Linn County beside the ground around it
Oregon as a whole has more moderate-potential ground than Linn County: 62.3% of its land, against 23.4% here. Of the 6 counties that border it, 3 have more moderate-potential ground, Jefferson County the most at 85.5%.
The map rates the ground, not the air in any home.
Local help
Linn County, Local resources
Radon testing and mitigation in Linn 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
Linn County, Questions
Questions about radon in Linn County
Are radon levels high in Linn County?
In 2023, 4.9% of the radon tests reported to CDC for Linn County, Oregon were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.8 pCi/L. Of 14 Oregon counties with 30 or more tests for the same period, 12 reported a higher share; pooled, the state comes to 18.9%.
Which counties border Linn County?
Linn County borders 6 counties: Marion County, Benton County, Lane County, Polk County, Deschutes County and Jefferson County.
Products
Linn County, Products
Testing a home in Linn County
In Linn County, 4.9% of 41 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 Linn 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
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Linn County, Bordering counties
Counties bordering Linn County
Calculated by Radon411- Radon levels in Marion CountyEPA zone 3
16.0%at or above 4 pCi/L
Median 1.4 pCi/L · 194 tests · 11.1 points above Linn County
- Radon levels in Benton CountyEPA zone 3
15.6%at or above 4 pCi/L
Median 0.9 pCi/L · 32 tests · 10.7 points above Linn County
- Radon levels in Lane CountyEPA zone 3
15.5%at or above 4 pCi/L
Median 1.0 pCi/L · 58 tests · 10.6 points above Linn County
- Radon levels in Polk CountyEPA zone 3
10.1%at or above 4 pCi/L
Median 1.4 pCi/L · 79 tests · 5.2 points above Linn County
- Radon levels in Deschutes CountyEPA zone 3
1.7%at or above 4 pCi/L
Median 0.9 pCi/L · 60 tests · 3.2 points below Linn County
- Radon levels in Jefferson CountyEPA zone 2
No CDC figure for 2023; its page reads it against its own neighbours.
Linn County, Cities and towns
Cities and towns in Linn County
The Census Bureau estimates 132,843 residents in Linn County for July 1, 2025, 3,893 more than in 2020 (+3.0%). That works out to 58 people per square mile of land. Albany, the largest place on its list (56,894 residents in all), extends beyond Linn County, so no share of the total is worked out for it. Reported testing is thin here: 41 tests over 2023, or 0.3 for every 1,000 residents (2025 estimate), where Oregon as a whole comes to 0.5.
From Albany to Idanha, CDC publishes no figure by town: each reads Linn County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Albanyextends beyond Linn County | 56,894 | +0.6% | Counted whole |
| Lebanon | 20,267 | +9.2% | 15.3% |
| Sweet Home | 10,308 | +4.6% | 7.8% |
| Harrisburg | 3,765 | +3.0% | 2.8% |
| Millersburg | 3,583 | +15.4% | 2.7% |
| Mill Cityextends beyond Linn County | 2,125 | +7.4% | Counted whole |
| Brownsville | 1,904 | +12.1% | 1.4% |
| Tangent | 1,245 | Level | 0.9% |
| Lyons | 1,226 | +0.9% | 0.9% |
| Scio | 959 | −1.1% | 0.7% |
| Halsey | 946 | −1.5% | 0.7% |
| Gatesextends beyond Linn County | 482 | −12.8% | Counted whole |
- Sodaville
- Waterloo
- Idanha (part)
15 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Linn County is counted whole, so it has no share.
Linn County, Homes
Homes in Linn County
Of Linn County's 52,740 homes, 64% are detached houses, against 63% across Oregon; 15% are mobile homes. Half of its homes were built before 1978, close to Oregon's 1980: 25% date from before 1960 and 22% from 2000 or later. 67% 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 | Linn County | Oregon |
|---|---|---|
| Housing units | 52,740 | 1,838,631 |
| Detached houses | 64% | 63% |
| In buildings of 5 or more | 10% | 17% |
| Mobile homes | 15% | 8% |
| Built before 1960 | 25% | 23% |
| Built since 2000 | 22% | 24% |
| Middle year built | 1978 | 1980 |
| Owner-occupied | 67% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.