Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Lewis County, Kentucky
EPA puts Lewis County in Zone 2, its middle radon zone, and only 12 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
37.0%
Scioto County
- Scioto
- 37.0%
- Greenup
- 12.5%
5 of 7 neighbours have 30+ tests, 2008 to 2017
Nearest county
31.7%
Carter County, 23 miles
- Carter
- 31.7%
- Kentucky
- 43.7%
Share at 4+ pCi/L, 41 tests, 2008 to 2017
Ground above low
100.0%
5.7 pts above Kentucky
- Lewis
- 100.0%
- Kentucky
- 94.3%
Share of land USGS rates moderate or high potential
Tests reported
12
Too few for a share
- Lewis
- 12
- 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 Lewis 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
Lewis County, At a glance
Lewis County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Lewis County is a
USGS geologic potential: Moderate across 59% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lewis County, 2008 to 2017, laboratory
CDC holds 12 reported tests for Lewis County over the 2008 to 2017 laboratory totals, with a median of 2.8 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Lewis County beside the counties around it is how this page reads it.
What these figures count
Only 12 tests were reported to CDC for Lewis 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).
Lewis County, Compared
Lewis County radon figures, compared
Calculated by Radon411CDC's largest figure for Lewis County rests on 12 tests over the 2008 to 2017 laboratory totals, 4 of them at or above 4 pCi/L, so each test moves its share by 8.3 points and no rank or comparison is drawn from it. Results reached as high as 12.8 pCi/L, with a middle value of 2.8 pCi/L.
Of the counties bordering it, 5 have a figure over the 2008 to 2017 laboratory totals: Scioto County, OH reported the largest share at or above 4 pCi/L, 37.0%, and Greenup County the smallest, 12.5%, with Carter County at 31.7%, Mason County at 25.0% and Rowan County at 18.9% between. Farther out, Boyd County (39 miles away) at 17.9%, Menifee County (42 miles away) at 22.0% and Montgomery County (45 miles away) at 51.4% have figures too. Pooled across 120 Kentucky counties, 43.7% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Meade County reported the highest share (68.4%) and Hopkins County the lowest (9.5%). EPA's 1993 map puts Lewis County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 59% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lewis County, Geology
The ground under Lewis County
PredictedUSGS's geologic map splits Lewis County: 59.2% of its land is moderate radon potential and 40.8% high. The map puts 55.9% of Lewis County in the area it calls Mississippian Plateau and 40.3% in New Albany-Chattanooga Shale, with one smaller area beside them. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 14, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Mississippian Plateau | Mississippian marine limestones, dolomites, marine sandstones, siltstones, and shales. | Moderate | 11 | 55.9% |
| New Albany-Chattanooga Shale | Devonian/Mississippian Black shale. | High | 14 | 40.3% |
| Outer Bluegrass | Ordovician-Devonian limestone and shale. | Moderate | 11 | 3.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lewis County beside the ground around it
Lewis County has more high-potential ground than Kentucky as a whole: 40.8% of its land against 18.2%. Of the 7 counties that border it, 3 have more high-potential ground, Scioto County, OH the most at 79.3%.
The map rates the ground, not the air in any home.
Local help
Lewis County, Local resources
Radon testing and mitigation in Lewis County
- Kentucky's radon programKentucky Board of Radon SafetyKentucky's radon program answers questions about testing, mitigation and the rules in Kentucky.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Kentucky8 professionals are listed in Kentucky.
What Kentucky's program says
- Phone
- 502-782-2782
- Radon@ky.gov
What it means
Lewis County, Questions
Questions about radon in Lewis County
Are radon levels high in Lewis County?
Over the 2008 to 2017 laboratory totals, 33.3% of the radon tests reported to CDC for Lewis County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.8 pCi/L. Of the counties bordering it, 5 have a figure over the 2008 to 2017 laboratory totals: Scioto County, OH reported the largest share at or above 4 pCi/L, 37.0%, and Greenup County the smallest, 12.5%, with Carter County at 31.7%, Mason County at 25.0% and Rowan County at 18.9% between.
Which counties border Lewis County?
Lewis County borders 7 counties: Fleming County, KY, Rowan County, KY, Carter County, KY, Mason County, KY, Adams County, OH, Greenup County, KY and Scioto County, OH.
Products
Lewis County, Products
Testing a home in Lewis County
No CDC figure names Lewis County; the nearest county with one, Carter County (23 miles away), reported 31.7% 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 Lewis 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
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lewis County, Bordering counties
Counties bordering Lewis County
Calculated by Radon411- Radon levels in Adams County, OHEPA zone 1
50.0%at or above 4 pCi/L
Median 3.8 pCi/L · 18 tests
- Radon levels in Scioto County, OHEPA zone 2
37.0%at or above 4 pCi/L
Median 2.7 pCi/L · 73 tests
- Radon levels in Fleming County, KYEPA zone 2
36.4%at or above 4 pCi/L
Median 2.9 pCi/L · 22 tests
- Radon levels in Carter County, KYEPA zone 2
31.7%at or above 4 pCi/L
Median 2.2 pCi/L · 41 tests
- Radon levels in Mason County, KYEPA zone 2
25.0%at or above 4 pCi/L
Median 2.6 pCi/L · 32 tests
- Radon levels in Rowan County, KYEPA zone 2
18.9%at or above 4 pCi/L
Median 1.6 pCi/L · 74 tests
- Radon levels in Greenup County, KYEPA zone 2
12.5%at or above 4 pCi/L
Median 2.0 pCi/L · 104 tests
Lewis County, Cities and towns
Cities and towns in Lewis County
About 12,901 people live in Lewis County by the Census Bureau's estimate for July 1, 2025, 187 fewer than in 2020 (−1.4%). That works out to 27 people per square mile of land. No town dominates: Vanceburg, the largest, has 1,386 residents, 10.7% of the total. Together its 2 incorporated places hold 10.9% of those residents; the other 89.1% live outside any of them. Reported testing is thin here: 12 tests over 2008 to 2017, or 0.9 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 6.3.
From Vanceburg to Concord, CDC publishes no figure by town: each reads Lewis County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Vanceburg | 1,386 | −3.1% | 10.7% |
| Concord | 17 | −5.6% | 0.1% |
2 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).
Lewis County, Homes
Homes in Lewis County
Of Lewis County's 6,072 homes, 67% are detached houses, against 68% across Kentucky; 25% are mobile homes. Half of its homes were built before 1985, close to Kentucky's 1982: 23% date from before 1960 and 22% from 2000 or later. Owners live in 79% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.
| Homes | Lewis County | Kentucky |
|---|---|---|
| Housing units | 6,072 | 2,010,655 |
| Detached houses | 67% | 68% |
| In buildings of 5 or more | 5% | 12% |
| Mobile homes | 25% | 11% |
| Built before 1960 | 23% | 22% |
| Built since 2000 | 22% | 24% |
| Middle year built | 1985 | 1982 |
| Owner-occupied | 79% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.