Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Lake County, Tennessee
EPA puts Lake County in Zone 3, its lowest radon zone, and only 7 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
11.1%
Obion County
- Obion
- 11.1%
1 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
11.1%
Obion County, 19 miles
- Obion
- 11.1%
- Tennessee
- 33.3%
Share at 4+ pCi/L, 36 tests, 2008 to 2017
Ground above low
None
69.5 pts below Tennessee
- Lake
- 0.0%
- Tennessee
- 69.5%
Share of land USGS rates moderate or high potential
Tests reported
7
Too few for a share
- Lake
- 7
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Lake 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
Lake County, At a glance
Lake County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Lake County, 2008 to 2017, laboratory
CDC holds 7 reported tests for Lake County over the 2008 to 2017 laboratory totals, with a median of 1.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Lake County beside the counties around it is how this page reads it.
What these figures count
Only 7 tests were reported to CDC for Lake 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).
Lake County, Compared
Lake County radon figures, compared
Calculated by Radon411CDC's largest figure for Lake County rests on 7 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 14.3 points and no rank or comparison is drawn from it. Results reached as high as 1.5 pCi/L, with a middle value of 1.0 pCi/L.
Obion County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 11.1% of its tests at or above 4 pCi/L. Farther out, Gibson County (39 miles away) at 5.3%, Tipton County (60 miles away) at 4.5% and Madison County (62 miles away) at 8.7% have figures too. Pooled across 95 Tennessee counties, 33.3% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Jefferson County reported the highest share (56.8%) and Chester County the lowest (0.0%). EPA's 1993 map puts Lake County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Lake County, Geology
The ground under Lake County
PredictedUSGS's geologic map puts all of Lake County's mapped land in one class: low radon potential. 98.8% of it lies in the area the map calls Mississippi Alluvial Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Mississippi Alluvial Plain | Alluvial sand, silt, gravel, and clay. | Low | 7 | 98.8% |
| Coastal Plains Province | Tertiary-Quaternary sandstone, shale, and alluvium. | Low | 5 | 1.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lake County beside the ground around it
Across Tennessee 47.2% of the land is rated high; none of Lake County's is. None of the 5 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Lake County, Local resources
Radon testing and mitigation in Lake 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
Lake County, Questions
Questions about radon in Lake County
Are radon levels high in Lake County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Lake County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.0 pCi/L. Obion County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 11.1% of its tests at or above 4 pCi/L.
Which counties border Lake County?
Lake County borders 5 counties: Obion County, TN, Dyer County, TN, New Madrid County, MO, Pemiscot County, MO and Fulton County, KY.
Products
Lake County, Products
Testing a home in Lake County
No CDC figure names Lake County; the nearest county with one, Obion County (19 miles away), reported 11.1% 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. 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 Lake County.
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
Monitor
EcoQube Wi-Fi continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Wi-Fi
- App only
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lake County, Bordering counties
Counties bordering Lake County
Calculated by Radon411- Radon levels in Obion County, TNEPA zone 3
11.1%at or above 4 pCi/L
Median 1.8 pCi/L · 36 tests
- Radon levels in New Madrid County, MOEPA zone 3
11.1%at or above 4 pCi/L
Median 1.4 pCi/L · 9 tests
- Radon levels in Dyer County, TNEPA zone 3
0.0%at or above 4 pCi/L
Median 1.4 pCi/L · 22 tests
- Radon levels in Pemiscot County, MOEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 5 tests
- Radon levels in Fulton County, KYEPA zone 3
0.0%at or above 4 pCi/L
Median 1.9 pCi/L · 1 test
Lake County, Cities and towns
Cities and towns in Lake County
Lake County has been losing residents: from 6,988 in 2020 to 6,249 on July 1, 2025, a fall of 10.6% by the Census Bureau's estimates. That works out to 38 people per square mile of land. Tiptonville alone is home to 3,333 of them, 53.3% of the total. Together its 2 incorporated places hold 79.2% of those residents; the other 20.8% live outside any of them. Reported testing is thin here: 7 tests over 2008 to 2017, or 1.1 for every 1,000 residents (2025 estimate), where Tennessee as a whole comes to 4.2.
From Tiptonville to Ridgely, CDC publishes no figure by town: each reads Lake County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Tiptonville | 3,333 | −16.1% | 53.3% |
| Ridgely | 1,616 | −4.0% | 25.9% |
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).
Lake County, Homes
Homes in Lake County
Of Lake County's 2,497 homes, 69% are detached houses, against 68% across Tennessee; 9% are in buildings of five or more homes. The homes are older than Tennessee's as a whole: half were built before 1974 (1986 for Tennessee), and 28% date from before 1960. Most occupied homes here are rented: owners live in 45% (Tennessee: 67%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Lake County | Tennessee |
|---|---|---|
| Housing units | 2,497 | 3,095,472 |
| Detached houses | 69% | 68% |
| In buildings of 5 or more | 9% | 14% |
| Mobile homes | 6% | 8% |
| Built before 1960 | 28% | 18% |
| Built since 2000 | 9% | 29% |
| Middle year built | 1974 | 1986 |
| Owner-occupied | 45% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.