Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Lawrence County, Tennessee
EPA puts Lawrence County in Zone 1, its highest radon zone, and only 1 radon test from it is on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
21.3%
12.0 pts below TN
- Lawrence
- 21.3%
- Tennessee
- 33.3%
136 tests, 2008 to 2017
Median result
1.6pCi/L
Below action level
- Lawrence
- 1.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
136
38th of 80 by tests
- Lawrence
- 136
- Davidson
- 5,592
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Tennessee
53 of 80
Middle half
- Lawrence
- 21.3%
- Jefferson
- 56.8%
By share, of 80 with 30+ tests
Read a result for Lawrence County
Starts at Lawrence County's median, 1.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.6 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. Lawrence County's median reported result, 2008 to 2017.
The data
Lawrence County, At a glance
Lawrence County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Lawrence County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lawrence County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2022 | 22.2% |
| 2023 | 0.0% |
2023: 0.0%. Across these years the share ran from 0.0% to 22.2%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Lawrence County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Lawrence County, Compared
Lawrence County radon figures, compared
Calculated by Radon411Lawrence County's 136 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.6 pCi/L and a maximum of 15.4 pCi/L, and 21.3% reached 4 pCi/L. Tennessee as a whole (95 Tennessee counties, pooled) comes to 33.3%: 12.0 points higher than here.
The newest figure, in 2023, counts only 1 test (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 136-test figure.
Among its state's counties it ranks 53rd of 80 Tennessee counties with 30 or more tests for the same period. Statewide for the same period, Jefferson County reported the highest share (56.8%) and Chester County the lowest (0.0%).
Below the action level, 83 tests (61.0%) came in under 2 pCi/L, against 42.4% statewide, and 24 tests (17.6%) fell between 2 and 4, against 24.3% statewide. The busiest year on file was 2022, with 27 tests reported; the quietest, 2023, had 1.
EPA's 1993 zone map puts Lawrence County in Zone 1, a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land high radon potential.
Next door, the shares run from 16.1% in Lewis County to 40.7% in Giles County, with Lewis County below Lawrence County.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lawrence County, Geology
The ground under Lawrence County
PredictedUSGS's geologic map puts all of Lawrence County's mapped land in one class: high radon potential. 98.4% of it lies in the area the map calls Cherty Highland, to which USGS gives a radon index of 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Cherty Highland | Cherty dolostone. | High | 12 | 98.4% |
| Nashville Basin | Mississippian Limestone. | High | 14 | 1.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lawrence County beside the ground around it
Lawrence County has more high-potential ground than Tennessee as a whole: 100% of its land against 47.2%. Of the 5 counties that border it, none has as large a share of high-potential ground; Lewis County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Lawrence County, Local resources
Radon testing and mitigation in Lawrence County
- Tennessee Radon ProgramTennessee Radon Program, run by Department of Environment & Conservation, offers free or discounted test kits, and answers questions about testing and mitigation in Tennessee.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The Tennessee Radon Program provides free radon test kits and information assistance to residents, while also providing training opportunities to radon professionals across the state.
- Compare kits
- Professionals in Tennessee1 professional is listed in Tennessee.
What Tennessee's program says
- Phone
- 1-800-232-1139
- TDEC.Radon@tn.gov
What it means
Lawrence County, Questions
Questions about radon in Lawrence County
Are radon levels high in Lawrence County?
In 2023, 0.0% of the radon tests reported to CDC for Lawrence County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of 80 Tennessee counties with 30 or more tests for the same period, 52 reported a higher share; pooled, the state comes to 33.3%.
Which counties border Lawrence County?
Lawrence County borders 5 counties: Lewis County, TN, Giles County, TN, Wayne County, TN, Maury County, TN and Lauderdale County, AL.
Products
Lawrence County, Products
Testing a home in Lawrence County
In Lawrence County, 21.3% of 136 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 33.3% pooled across Tennessee. In Zone 1 the year-round level in Lawrence County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.
Test kits and monitors3
See every kit and monitor
Monitor
EcoBlu plug-in digital radon monitor with a display
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Lawrence County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Lawrence County
Explore
Lawrence County, Bordering counties
Counties bordering Lawrence County
Calculated by Radon411- Radon levels in Giles County, TNEPA zone 1
40.7%at or above 4 pCi/L
Median 3.3 pCi/L · 140 tests · 19.4 points above Lawrence County
- Radon levels in Maury County, TNEPA zone 3
39.3%at or above 4 pCi/L
Median 3.0 pCi/L · 509 tests · 18.0 points above Lawrence County
- Radon levels in Lauderdale County, ALEPA zone 1
27.2%at or above 4 pCi/L
Median 2.2 pCi/L · 1,885 tests · 5.9 points above Lawrence County
- Radon levels in Lewis County, TNEPA zone 1
16.1%at or above 4 pCi/L
Median 1.4 pCi/L · 56 tests · 5.2 points below Lawrence County
- Radon levels in Wayne County, TNEPA zone 1
7.7%at or above 4 pCi/L
Median 1.7 pCi/L · 26 tests · 13.6 points below Lawrence County
Lawrence County, Cities and towns
Cities and towns in Lawrence County
Lawrence County is growing: the Census Bureau puts it at 46,914 residents on July 1, 2025, up 6.2% from 44,185 in 2020. That works out to 76 people per square mile of land. Its largest town, Lawrenceburg, has 12,236 residents, 26.1% of the total. Together its 4 incorporated places hold 32.9% of those residents; the other 67.1% live outside any of them. CDC's 136 reported tests for 2008 to 2017 work out to 2.9 per 1,000 residents (2025 estimate), close to Tennessee's 4.2.
From Lawrenceburg to Ethridge, CDC publishes no figure by town: each reads Lawrence County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Lawrenceburg | 12,236 | +5.2% | 26.1% |
| Loretto | 1,813 | +4.9% | 3.9% |
| St. Joseph | 829 | +4.7% | 1.8% |
| Ethridge | 563 | +6.4% | 1.2% |
4 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).
Lawrence County, Homes
Homes in Lawrence County
Lawrence County is a place of houses on their own lots: 77% of its 18,699 homes are detached single-family houses, against 68% across Tennessee. Half of its homes were built before 1981, close to Tennessee's 1986: 21% date from before 1960 and 20% from 2000 or later. Owners live in 76% of the occupied homes (Tennessee: 67%), so for most households a test and a fix are their own to order.
| Homes | Lawrence County | Tennessee |
|---|---|---|
| Housing units | 18,699 | 3,095,472 |
| Detached houses | 77% | 68% |
| In buildings of 5 or more | 4% | 14% |
| Mobile homes | 12% | 8% |
| Built before 1960 | 21% | 18% |
| Built since 2000 | 20% | 29% |
| Middle year built | 1981 | 1986 |
| Owner-occupied | 76% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.