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 Graves County, Kentucky
EPA puts Graves County in Zone 3, its lowest radon zone, and only 24 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
Share at 4+ pCi/L
9.7%
35.4 pts below KY
- Graves
- 9.7%
- Kentucky
- 45.1%
31 tests, 2007 to 2016
Median result
1.5pCi/L
Below action level
- Graves
- 1.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2007 to 2016
Tests reported
31
68th of 69 by tests
- Graves
- 31
- Jefferson
- 5,581
Reported to CDC before any fix, 2007 to 2016
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Kentucky
69 of 69
Lowest quarter
- Graves
- 9.7%
- Meade
- 71.6%
By share, of 69 with 30+ tests
Read a result for Graves County
Starts at Graves County's median, 1.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.5 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. Graves County's median reported result, 2007 to 2016.
The data
Graves County, At a glance
Graves 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 Graves County, 2008 to 2017, laboratory
CDC holds 24 reported tests for Graves County over the 2008 to 2017 laboratory totals, with a median of 1.5 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Graves County beside the counties around it is how this page reads it.
What these figures count
Only 24 tests were reported to CDC for Graves 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).
Graves County, Compared
Graves County radon figures, compared
Calculated by Radon411Graves County reports fewer high tests than Kentucky overall. 9.7% of its 31 tests over the 2007 to 2016 laboratory totals were at or above 4 pCi/L. That is 35.4 points below the 45.1% pooled from 120 Kentucky counties.
The newest figure, over the 2008 to 2017 laboratory totals, counts only 24 tests (8.3% at or above 4 pCi/L), too few to compare, so this reading uses the 31-test figure.
Ordered from highest share down, it comes 69th of 69 Kentucky counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.8%; Graves County sits 26.1 points below it.
Next door, the shares run from 10.7% in Marshall County to 17.2% in Henry County, TN. Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 9.7% share point the same way here.
Half the tests came in under 1.5 pCi/L and half over it; the single highest reached 23.3 pCi/L. The rest split 64.5% under 2 pCi/L and 25.8% from 2 to 4 (Kentucky: 31.6% and 23.3%).
CDC's ten-year totals for Graves County went from 30 tests (2005 to 2014) to 24 (2008 to 2017), the share going from 10.0% to 8.3%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Graves County, Geology
The ground under Graves County
PredictedUSGS's geologic map puts all of Graves County's mapped land in one class: low radon potential. All of it lies in the area the map calls Jackson Purchase, to which USGS gives a radon index of 6, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Jackson Purchase | Cretaceous and Tertiary marine and continental gravels, sands, silts, and clays, overlain by alluvium and loess. | Low | 6 | 99.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Graves County beside the ground around it
Across Kentucky 18.2% of the land is rated high; none of Graves County's is. Of the 7 counties that border it, 2 have more high-potential ground, Henry County, TN the most at 8.1%.
The map rates the ground, not the air in any home.
Local help
Graves County, Local resources
Radon testing and mitigation in Graves 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
Graves County, Questions
Questions about radon in Graves County
Are radon levels high in Graves County?
Over the 2008 to 2017 laboratory totals, 8.3% of the radon tests reported to CDC for Graves County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.5 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 68 reported a higher share; pooled, the state comes to 45.1%.
Which counties border Graves County?
Graves County borders 7 counties: Hickman County, KY, Calloway County, KY, Weakley County, TN, Carlisle County, KY, Marshall County, KY, Henry County, TN and McCracken County, KY.
Products
Graves County, Products
Testing a home in Graves County
In Graves County, 9.7% of 31 tests reported to CDC over the 2007 to 2016 laboratory totals reached 4 pCi/L, against 45.1% pooled across Kentucky. 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 Graves County.
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
MonitorX-Sense
XR0B-SR battery digital radon monitor with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Graves County, Bordering counties
Counties bordering Graves County
Calculated by Radon411- Radon levels in Calloway County, KYEPA zone 3
23.1%at or above 4 pCi/L
Median 2.7 pCi/L · 26 tests · 13.4 points above Graves County
- Radon levels in McCracken County, KYEPA zone 3
20.0%at or above 4 pCi/L
Median 1.7 pCi/L · 25 tests · 10.3 points above Graves County
- Radon levels in Henry County, TNEPA zone 3
17.2%at or above 4 pCi/L
Median 1.7 pCi/L · 58 tests · 7.5 points above Graves County
- Radon levels in Weakley County, TNEPA zone 3
11.8%at or above 4 pCi/L
Median 1.0 pCi/L · 17 tests · 2.1 points above Graves County
- Radon levels in Marshall County, KYEPA zone 3
10.7%at or above 4 pCi/L
Median 1.4 pCi/L · 84 tests · 1.0 points above Graves County
- Radon levels in Hickman County, KYEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 7 tests · 9.7 points below Graves County
- Radon levels in Carlisle County, KYEPA zone 3
0.0%at or above 4 pCi/L
Median 2.0 pCi/L · 1 test · 9.7 points below Graves County
Graves County, Cities and towns
Cities and towns in Graves County
The Census Bureau estimates 37,050 residents in Graves County for July 1, 2025, 517 more than in 2020 (+1.4%). That works out to 67 people per square mile of land. Its largest town, Mayfield, has 9,851 residents, 26.6% of the total. Together its 2 incorporated places hold 28.2% of those residents; the other 71.8% live outside any of them. Reported testing is thin here: 31 tests over 2007 to 2016, or 0.8 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 5.7.
From Mayfield to Wingo, CDC publishes no figure by town: each reads Graves County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mayfield | 9,851 | −1.3% | 26.6% |
| Wingo | 584 | +1.9% | 1.6% |
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).
Graves County, Homes
Homes in Graves County
Graves County is a place of houses on their own lots: 80% of its 16,437 homes are detached single-family houses, against 68% across Kentucky. Half of its homes were built before 1978, close to Kentucky's 1982: 22% date from before 1960 and 20% from 2000 or later. Owners live in 76% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.
| Homes | Graves County | Kentucky |
|---|---|---|
| Housing units | 16,437 | 2,010,655 |
| Detached houses | 80% | 68% |
| In buildings of 5 or more | 3% | 12% |
| Mobile homes | 11% | 11% |
| Built before 1960 | 22% | 22% |
| Built since 2000 | 20% | 24% |
| Middle year built | 1978 | 1982 |
| Owner-occupied | 76% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.