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Radon Levels in Lane County, Oregon

EPA puts Lane County in Zone 3, its lowest radon zone, and 15.5% of its 58 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

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    15.5%

    3.4 pts below OR

    Lane
    15.5%
    Oregon
    18.9%

    58 tests, 2023

  • Median result

    1.0pCi/L

    Below action level

    Lane
    1.0 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    58

    7th of 14 by tests

    Lane
    58
    Multnomah
    792

    Reported to CDC before any fix, 2023

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

  • Rank in Oregon

    9 of 14

    Middle half

    Lane
    15.5%
    Hood River
    39.0%

    By share, of 14 with 30+ tests

Read a result for Lane County

Starts at Lane County's median, 1.0 pCi/L

1.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 1.0 pCi/L

Below 2 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Lane County's median reported result, 2023.

Interpret this reading

The data

Lane County, At a glance

Lane County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Lane County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 90% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Lane County, 2023

Share of reported tests at or above 4 pCi/L, by year, Lane County
Share of reported tests at or above 4 pCi/L, by year, Lane County
YearShare of reported tests at or above 4 pCi/L
20146.1%
201512.5%
20167.5%
20172.8%
201814.5%
20196.5%
202028.4%
20217.3%
202215.9%
202315.5%

2023: 15.5%. Across these years the share ran from 2.8% to 28.4%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 58 tests reported to CDC for Lane 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).

How to read these figures

Lane County, Compared

Lane County radon figures, compared

Calculated by Radon411

Lane County's 58 reported tests in 2023 had a middle value of 1.0 pCi/L and a maximum of 28.5 pCi/L, and 15.5% reached 4 pCi/L. Oregon as a whole (28 Oregon counties, pooled) comes to 18.9%: 3.4 points higher than here.

Among its state's counties it ranks 9th 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, 41 tests (70.7%) came in under 2 pCi/L, against 59.5% statewide, and 8 tests (13.8%) fell between 2 and 4, against 21.6% statewide. The busiest year on file was 2021, with 273 tests reported; the quietest, 2023, had 58.

EPA's 1993 zone map puts Lane County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 90% of the county's land low radon potential.

Next door, the shares run from 1.7% in Deschutes County to 33.3% in Douglas County, with Lincoln County, Linn County and Deschutes County below Lane County. Over 10 years of annual figures the share rose 9.4 points, from 6.1% in 2014 to 15.5% in 2023; its peak was 28.4% in 2020.

Share of reported tests at or above 4 pCi/L by year, Lane County against Oregon2014 to 2023, years with 30 or more tests: Lane County 6.1% to 15.5%, the state's pooled share 18.9% in 2023.
Lane CountyOregon, pooled
Share of reported tests at or above 4 pCi/L by year, Lane County against Oregon: data table
YearTestsLane County, at or above 4 pCi/LOregon, pooled
2014666.1%25.1%
20158812.5%27.4%
2016677.5%21.5%
2017712.8%19.2%
20186914.5%19.6%
2019776.5%20.2%
202025028.4%16.8%
20212737.3%16.3%
202220715.9%20.2%
20235815.5%18.9%
Lane County against Oregon, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Lane County
Lane County5815.5%1.0 pCi/LThis county
Oregon, pooled28 counties, pooled2,32918.9%Not pooled+3.4 points
United States, pooled642 counties, pooled128,74033.4%Not pooled+17.9 points
Hood River Countyhighest in the state4139.0%2.2 pCi/L+23.5 points
Polk Countylowest in the state7910.1%1.4 pCi/L−5.4 points
Douglas County, ORborders it3333.3%1.8 pCi/L+17.8 points
Benton County, ORborders it3215.6%0.9 pCi/L+0.1 points
Klamath County, ORborders it1315.4%1.4 pCi/L−0.1 points
Lincoln County, ORborders it368.3%1.1 pCi/L−7.2 points
Linn County, ORborders it414.9%0.8 pCi/L−10.6 points
Deschutes County, ORborders it601.7%0.9 pCi/L−13.8 points
Where Lane County's reported results fell, 2023, beside Oregon and the United States
ResultLane County testsLane County shareOregon shareU.S. shareAgainst Oregon
Under 2 pCi/L4170.7%59.5%41.4%+11.2 points
2 to 4 pCi/L813.8%21.6%25.2%−7.8 points
4 pCi/L and above915.5%18.9%33.4%−3.4 points
Lane County ranked among the 14 Oregon counties with 30 or more tests, by share at or above 4 pCi/L, 2023
CountyRankTestsAt or above 4 pCi/LMedian
Yamhill County4 of 143321.2%1.6 pCi/L
Jackson County5 of 144916.3%0.7 pCi/L
Marion County6 of 1419416.0%1.4 pCi/L
Clackamas County7 of 1432115.9%1.6 pCi/L
Benton County8 of 143215.6%0.9 pCi/L
Lane County9 of 145815.5%1.0 pCi/L
Washington County10 of 1439611.4%1.3 pCi/L
Polk County11 of 147910.1%1.4 pCi/L
Lincoln County12 of 14368.3%1.1 pCi/L
Linn County13 of 14414.9%0.8 pCi/L
Deschutes County14 of 14601.7%0.9 pCi/L
Lane County radon tests by year, against Oregon's pooled share
YearTestsAt or above 4 pCi/LMedianHighestOregon, pooledChange from the row before
20235815.5%1.0 pCi/L28.5 pCi/L18.9%−0.4 points
202220715.9%1.4 pCi/L18.5 pCi/L20.2%+8.6 points
20212737.3%0.9 pCi/L17.1 pCi/L16.3%−21.1 points
202025028.4%1.9 pCi/L22.7 pCi/L16.8%+21.9 points
2019776.5%0.8 pCi/L15.0 pCi/L20.2%−8.0 points
20186914.5%1.2 pCi/L21.1 pCi/L19.6%+11.7 points
2017712.8%0.9 pCi/L17.2 pCi/L19.2%−4.7 points
2016677.5%1.0 pCi/L11.2 pCi/L21.5%−5.0 points
20158812.5%1.1 pCi/L12.2 pCi/L27.4%+6.4 points
2014666.1%1.0 pCi/L6.5 pCi/L25.1%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Lane County, Geology

The ground under Lane County

Predicted

Most of the ground under Lane County is one class on USGS's geologic map: 89.8% of its land is low radon potential, with 10.0% moderate. The map puts 60.4% of Lane County in the area it calls Cascade Range and 29.4% in Coast Range, with one smaller area beside them. USGS gives both a radon index of 7, in the low band (5 to 8).

USGS's geologic areas under Lane County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Cascade RangeWestern Cascade Range is Tertiary andesite, basalt flows, and pyroclastic rocks. Eastern Cascades are late Tertiary to Quaternary basaltic and andesitic volcanic rocks.Low760.4%
Coast RangeNorthern Coast Range is marine sedimentary rocks and Tertiary mafic volcanic rocks. Southern Coast Range is Tertiary estuarine and marine sedimentary rocks, feldspathic and micaceous.Low729.4%
Wilamette ValleyGravelly to clayey alluvium with moderately elevated uranium content.Moderate910.0%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Lane County beside the ground around it

Oregon as a whole has more moderate-potential ground than Lane County: 62.3% of its land, against 10.0% here. Of the 6 counties that border it, 3 have more moderate-potential ground, Klamath County the most at 71.6%.

Share of land by USGS radon potential: Lane County, the 6 counties bordering it and Oregon
AreaEPA zoneLow potentialModerate potentialHigh potential
Lane CountyZone 389.8%10.0%None
Douglas CountyZone 399.7%NoneNone
Linn CountyZone 376.6%23.4%None
Benton CountyZone 382.8%17.2%None
Deschutes CountyZone 396.0%4.0%None
Lincoln CountyZone 398.9%NoneNone
Klamath CountyZone 228.4%71.6%None
Oregon36 counties, pooled by land areaVaries37.5%62.3%None

The map rates the ground, not the air in any home.

Local help

Lane County, Local resources

Radon testing and mitigation in Lane County

Listed radon businesses with an address in Lane County:

Listed radon professionals by town: Eugene

What Oregon's program says
Email
Radon.program@dhsoha.state.or.us

What it means

Lane County, Questions

Questions about radon in Lane County

Are radon levels high in Lane County?

In 2023, 15.5% of the radon tests reported to CDC for Lane County, Oregon were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.0 pCi/L. Of 14 Oregon counties with 30 or more tests for the same period, 8 reported a higher share; pooled, the state comes to 18.9%.

Which counties border Lane County?

Lane County borders 6 counties: Douglas County, Linn County, Benton County, Deschutes County, Lincoln County and Klamath County.

Products

Lane County, Products

Testing a home in Lane County

In Lane County, 15.5% of 58 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 Lane County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Lane County homes, compared

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Lane County, Bordering counties

Counties bordering Lane County

Calculated by Radon411

Lane County, Cities and towns

Cities and towns in Lane County

About 381,584 people live in Lane County by the Census Bureau's estimate for July 1, 2025, 2,658 fewer than in 2020 (−0.7%). That works out to 84 people per square mile of land. Its largest town, Eugene, has 178,618 residents, 46.8% of the total. Together its 12 incorporated places hold 74.9% of those residents; the other 25.1% live outside any of them. Reported testing is thin here: 58 tests over 2023, or 0.2 for every 1,000 residents (2025 estimate), where Oregon as a whole comes to 0.5.

From Eugene to Westfir, CDC publishes no figure by town: each reads Lane County's.

The cities and towns in Lane County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Eugene178,618Level46.8%
Springfield61,431−0.7%16.1%
Cottage Grove10,851+1.9%2.8%
Florence9,468−0.3%2.5%
Junction City7,224+7.4%1.9%
Creswell5,566−1.2%1.5%
Veneta5,138−1.6%1.3%
Oakridge3,127−2.6%0.8%
Dunes City1,400−2.0%0.4%
Coburg1,373+4.1%0.4%
Lowell1,283+6.5%0.3%
Westfir253−3.1%Under 0.1%

12 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).

Lane County, Homes

Homes in Lane County

Of Lane County's 168,316 homes, 61% are detached houses, against 63% across Oregon; 17% are in buildings of five or more homes. Half of its homes were built before 1977, close to Oregon's 1980: 22% date from before 1960 and 21% from 2000 or later. 59% 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 in Lane County, Oregon, 2019 to 2023
HomesLane CountyOregon
Housing units168,3161,838,631
Detached houses61%63%
In buildings of 5 or more17%17%
Mobile homes9%8%
Built before 196022%23%
Built since 200021%24%
Middle year built19771980
Owner-occupied59%63%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.