Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Lincoln County, Idaho
EPA puts Lincoln County in Zone 2, its middle radon zone, and only 20 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
57.7%
Blaine County
- Blaine
- 57.7%
- Minidoka
- 15.3%
4 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
16.9%
Jerome County, 22 miles
- Jerome
- 16.9%
- Idaho
- 41.5%
Share at 4+ pCi/L, 65 tests, 2008 to 2017
Ground above low
100.0%
8.0 pts above Idaho
- Lincoln
- 100.0%
- Idaho
- 92.0%
Share of land USGS rates moderate or high potential
Tests reported
20
Too few for a share
- Lincoln
- 20
- 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 98% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lincoln County, 2008 to 2017, laboratory
CDC holds 20 reported tests for Lincoln County over the 2008 to 2017 laboratory totals, with a median of 3.3 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Lincoln County beside the counties around it is how this page reads it.
What these figures count
Only 20 tests were reported to CDC for Lincoln County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Lincoln County, Compared
Lincoln County radon figures, compared
Calculated by Radon411CDC's largest figure for Lincoln County rests on 20 tests over the 2008 to 2017 laboratory totals, 8 of them at or above 4 pCi/L, so each test moves its share by 5.0 points and no rank or comparison is drawn from it. Results reached as high as 52.5 pCi/L, with a middle value of 3.3 pCi/L.
Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Blaine County reported the largest share at or above 4 pCi/L, 57.7%, and Minidoka County the smallest, 15.3%, with Gooding County at 28.4% and Jerome County at 16.9% between. Farther out, Twin Falls County (52 miles away) at 24.1%, Cassia County (57 miles away) at 59.5% and Power County (69 miles away) at 26.8% have figures too. Pooled across 44 Idaho counties, 41.5% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Bear Lake County reported the highest share (78.1%) and Payette County the lowest (4.9%). 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 98% 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: 98.1% of its land is moderate radon potential, with 1.9% high. 98.1% of it lies in the area the map calls Eastern Snake river plain and Malheur-Boise-King Section, 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 |
|---|---|---|---|---|
| Eastern Snake river plain and Malheur-Boise-King Section | Basalt flows. | Moderate | 10 | 98.1% |
| Northern Rocky Mountain Province | Diorite and granite of the Idaho batholith. | High | 12 | 1.9% |
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
Idaho as a whole has more high-potential ground than Lincoln County: 50.7% of its land, against 1.9% here. Of the 5 counties that border it, 3 have more high-potential ground, Camas 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
- DHW Environmental Health ProgramDHW Environmental Health Program, run by Idaho Department of Health and Welfare, offers free or discounted test kits, and answers questions about testing and mitigation in Idaho.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Order a free radon test kit.
- Compare kits
- See the Idaho directoryNo professionals are listed in Idaho yet. The state program can point you to registered testers and mitigators.
What Idaho's program says
- Phone
- 800-445-8647
- radon@dhw.idaho.gov
What it means
Lincoln County, Questions
Questions about radon in Lincoln County
Are radon levels high in Lincoln County?
Over the 2008 to 2017 laboratory totals, 40.0% of the radon tests reported to CDC for Lincoln County, Idaho were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.3 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Blaine County reported the largest share at or above 4 pCi/L, 57.7%, and Minidoka County the smallest, 15.3%, with Gooding County at 28.4% and Jerome County at 16.9% between.
Which counties border Lincoln County?
Lincoln County borders 5 counties: Jerome County, Blaine County, Minidoka County, Gooding County and Camas County.
Products
Lincoln County, Products
Testing a home in Lincoln County
No CDC figure names Lincoln County; the nearest county with one, Jerome County (22 miles away), reported 16.9% 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
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Monitor
View Plus radon and air quality monitor
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
- 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 Blaine CountyEPA zone 1
57.7%at or above 4 pCi/L
Median 5.3 pCi/L · 352 tests
- Radon levels in Gooding CountyEPA zone 1
28.4%at or above 4 pCi/L
Median 2.4 pCi/L · 67 tests
- Radon levels in Camas CountyEPA zone 1
27.3%at or above 4 pCi/L
Median 3.3 pCi/L · 11 tests
- Radon levels in Jerome CountyEPA zone 2
16.9%at or above 4 pCi/L
Median 1.9 pCi/L · 65 tests
- Radon levels in Minidoka CountyEPA zone 2
15.3%at or above 4 pCi/L
Median 1.8 pCi/L · 72 tests
Lincoln County, Cities and towns
Cities and towns in Lincoln County
Lincoln County is growing: the Census Bureau puts it at 5,603 residents on July 1, 2025, up 9.1% from 5,137 in 2020. Spread over its land, that is 4.7 people to the square mile. Its largest town, Shoshone, has 1,767 residents, 31.5% of the total. Together its 3 incorporated places hold 45.7% of those residents; the other 54.3% live outside any of them. Reported testing is thin here: 20 tests over 2008 to 2017, or 3.6 for every 1,000 residents (2025 estimate), where Idaho as a whole comes to 6.4.
From Shoshone to Dietrich, CDC publishes no figure by town: each reads Lincoln County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Shoshone | 1,767 | +6.6% | 31.5% |
| Richfield | 483 | +12.9% | 8.6% |
| Dietrich | 313 | +10.6% | 5.6% |
3 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
Of Lincoln County's 1,973 homes, 74% are detached houses, against 74% across Idaho; 23% are mobile homes. Half of its homes were built before 1987, close to Idaho's 1990: 30% date from before 1960 and 24% from 2000 or later. Owners live in 77% of the occupied homes (Idaho: 72%), so for most households a test and a fix are their own to order.
| Homes | Lincoln County | Idaho |
|---|---|---|
| Housing units | 1,973 | 776,683 |
| Detached houses | 74% | 74% |
| In buildings of 5 or more | 1% | 9% |
| Mobile homes | 23% | 7% |
| Built before 1960 | 30% | 18% |
| Built since 2000 | 24% | 35% |
| Middle year built | 1987 | 1990 |
| Owner-occupied | 77% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.