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 Lincoln County, Washington
EPA puts Lincoln County in Zone 2, its middle radon zone, and only 11 radon tests from it are on file with CDC (2020). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
41.4%
Spokane County
- Spokane
- 41.4%
- Whitman
- 22.4%
4 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
41.4%
Spokane County, 48 miles
- Spokane
- 41.4%
- Washington
- 25.5%
Share at 4+ pCi/L, 3,125 tests, 2008 to 2017
Ground above low
100.0%
47.3 pts above Washington
- Lincoln
- 100.0%
- Washington
- 52.7%
Share of land USGS rates moderate or high potential
Tests reported
15
Too few for a share
- Lincoln
- 15
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Lincoln 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
Lincoln County, At a glance
Lincoln County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lincoln County is a
USGS geologic potential: Moderate across 95% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lincoln County, 2020
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 66.7% |
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2017 | 75.0% |
| 2018 | 100.0% |
| 2019 | 50.0% |
| 2020 | 45.5% |
2020: 45.5%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 11 tests were reported to CDC for Lincoln County over 2020, 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: 2020. Measured data period: 2005 to 2020 (every CDC figure on file).
Lincoln County, Compared
Lincoln County radon figures, compared
Calculated by Radon411CDC's largest figure for Lincoln County rests on 15 tests over the 2008 to 2017 laboratory totals, 6 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 25.5 pCi/L, with a middle value of 3.1 pCi/L.
Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Spokane County reported the largest share at or above 4 pCi/L, 41.4%, and Whitman County the smallest, 22.4%, with Stevens County at 36.2% and Okanogan County at 35.0% between. Farther out, Pend Oreille County (85 miles away) at 63.2%, Walla Walla County (93 miles away) at 16.4% and Chelan County (105 miles away) at 14.6% have figures too. Pooled across 39 Washington counties, 25.5% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Pend Oreille County reported the highest share (63.2%) and Snohomish County the lowest (2.3%). EPA's 1993 map puts Lincoln County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 95% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lincoln County, Geology
The ground under Lincoln County
PredictedMost of the ground under Lincoln County is one class on USGS's geologic map: 95.3% of its land is moderate radon potential, with 4.7% high. 95.3% of it lies in the area the map calls Columbia Basin, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Columbia Basin | Basaltic rocks low in uranium content. Uranium content of soils is moderately elevated. | Moderate | 10 | 95.3% |
| Okanogan Highland | Glaciofluvial outwash and granitic material. Outwash is generally uranium-bearing. | High | 16 | 4.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lincoln County beside the ground around it
On high-potential ground Lincoln County is close to Washington as a whole: 4.7% of its land against 13.7%. Of the 7 counties that border it, 4 have more high-potential ground, Stevens County the most at 99.8%.
The map rates the ground, not the air in any home.
Local help
Lincoln County, Local resources
Radon testing and mitigation in Lincoln County
- Radon ProgramRadon Program, run by Washington State Department of Health, offers free or discounted test kits, and answers questions about testing and mitigation in Washington.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
We have a limited supply of free radon test kits.
- Compare kits
- See the Washington directoryNo professionals are listed in Washington yet. The state program can point you to registered testers and mitigators.
What Washington's program says
- Phone
- 360-236-3200
- doh.radon@doh.wa.gov
What it means
Lincoln County, Questions
Questions about radon in Lincoln County
Are radon levels high in Lincoln County?
In 2020, 45.5% of the radon tests reported to CDC for Lincoln County, Washington were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.4 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Spokane County reported the largest share at or above 4 pCi/L, 41.4%, and Whitman County the smallest, 22.4%, with Stevens County at 36.2% and Okanogan County at 35.0% between.
Which counties border Lincoln County?
Lincoln County borders 7 counties: Adams County, Spokane County, Grant County, Stevens County, Ferry County, Whitman County and Okanogan County.
Products
Lincoln County, Products
Testing a home in Lincoln County
No CDC figure names Lincoln County; the nearest county with one, Spokane County (48 miles away), reported 41.4% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Lincoln County; a long-term test tells the year-round average.
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
Lincoln County, Bordering counties
Counties bordering Lincoln County
Calculated by Radon411- Radon levels in Spokane CountyEPA zone 1
41.4%at or above 4 pCi/L
Median 2.9 pCi/L · 3,125 tests
- Radon levels in Stevens CountyEPA zone 1
36.2%at or above 4 pCi/L
Median 2.3 pCi/L · 196 tests
- Radon levels in Okanogan CountyEPA zone 1
35.0%at or above 4 pCi/L
Median 2.3 pCi/L · 40 tests
- Radon levels in Ferry CountyEPA zone 1
25.0%at or above 4 pCi/L
Median 2.5 pCi/L · 20 tests
- Radon levels in Grant CountyEPA zone 2
23.5%at or above 4 pCi/L
Median 2.7 pCi/L · 17 tests
- Radon levels in Whitman CountyEPA zone 2
22.4%at or above 4 pCi/L
Median 1.5 pCi/L · 58 tests
- Radon levels in Adams CountyEPA zone 2
14.3%at or above 4 pCi/L
Median 1.5 pCi/L · 7 tests
Lincoln County, Cities and towns
Cities and towns in Lincoln County
Lincoln County is growing: the Census Bureau puts it at 11,982 residents on July 1, 2025, up 9.7% from 10,926 in 2020. Spread over its land, that is 5.2 people to the square mile. No town dominates: Davenport, the largest, has 1,818 residents, 15.2% of the total. Together its 8 incorporated places hold 49.4% of those residents; the other 50.6% live outside any of them. CDC's 15 reported tests for 2008 to 2017 work out to 1.3 per 1,000 residents (2025 estimate), close to Washington's 1.0.
From Davenport to Creston, CDC publishes no figure by town: each reads Lincoln County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Davenport | 1,818 | +6.1% | 15.2% |
| Wilbur | 926 | +3.3% | 7.7% |
| Odessa | 922 | +2.7% | 7.7% |
| Reardan | 698 | +7.2% | 5.8% |
| Sprague | 526 | +4.2% | 4.4% |
| Harrington | 458 | +4.6% | 3.8% |
| Almira | 327 | +1.9% | 2.7% |
| Creston | 245 | +13.4% | 2.0% |
8 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).
Lincoln County, Homes
Homes in Lincoln County
Lincoln County is a place of houses on their own lots: 77% of its 5,840 homes are detached single-family houses, against 62% across Washington. The homes are older than Washington's as a whole: half were built before 1972 (1984 for Washington), and 40% date from before 1960. Owners live in 79% of the occupied homes (Washington: 64%), so for most households a test and a fix are their own to order.
| Homes | Lincoln County | Washington |
|---|---|---|
| Housing units | 5,840 | 3,262,667 |
| Detached houses | 77% | 62% |
| In buildings of 5 or more | 3% | 22% |
| Mobile homes | 16% | 6% |
| Built before 1960 | 40% | 21% |
| Built since 2000 | 19% | 28% |
| Middle year built | 1972 | 1984 |
| Owner-occupied | 79% | 64% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.