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
Locations and reports
Radon Levels in Jackson County, Missouri
EPA puts Jackson County in Zone 1, its highest radon zone, and high results are common there: 44.1% of the 204 radon tests reported to CDC (2023) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
44.1%
8.4 pts above MO
- Jackson
- 44.1%
- Missouri
- 35.7%
204 tests, 2023
Median result
3.4pCi/L
Below action level
- Jackson
- 3.4 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
204
2nd of 7 by tests
- Jackson
- 204
- St. Louis
- 443
Reported to CDC before any fix, 2023
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Missouri
2 of 7
Top quarter
- Jackson
- 44.1%
- Clay
- 44.6%
By share, of 7 with 30+ tests
Read a result for Jackson County
Starts at Jackson County's median, 3.4 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.4 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Jackson County's median reported result, 2023.
The data
Jackson County, At a glance
Jackson County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Jackson County in
USGS geologic potential: High across 70% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Jackson County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 38.4% |
| 2015 | 36.6% |
| 2016 | 38.7% |
| 2017 | 53.9% |
| 2018 | 47.2% |
| 2019 | 33.6% |
| 2020 | 46.2% |
| 2021 | 44.1% |
| 2022 | 54.6% |
| 2023 | 44.1% |
2023: 44.1%. Across these years the share ran from 33.6% to 54.6%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 204 tests reported to CDC for Jackson County over 2023, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Jackson County, Compared
Jackson County radon figures, compared
Calculated by Radon411In Jackson County, about 4 in 10 reported tests in 2023 (90 of 204) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 10.7 points higher. Across 91 Missouri counties pooled together, 35.7% of tests reached that level, so Jackson County runs 8.4 points above its state.
Clay County, the one bordering county with a figure for the same period, reported 44.6%. By share, Jackson County is 2nd of 7 Missouri counties with 30 or more tests for the same period.
Year by year, 2014 opened at 38.4% and 2023 closed at 44.1% (up 5.7 points), with 2022 the high at 54.6%. Half the tests came in under 3.4 pCi/L and half over it; the single highest reached 45.0 pCi/L. Below the action level, 64 tests (31.4%) came in under 2 pCi/L, against 36.6% statewide, and 50 tests (24.5%) fell between 2 and 4, against 27.7% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 44.1% share point the same way here. USGS geology rates 70% of the county's land high radon potential. CDC also counts 11 tests taken after mitigation in Jackson County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2016, with 612 tests reported; the quietest, 2019, had 134.
Jackson CountyMissouri, pooled
44.1% % of tests35.7% % of tests
| Year | Tests | Jackson County, at or above 4 pCi/L | Missouri, pooled |
|---|---|---|---|
| 2014 | 427 | 38.4% | 34.4% |
| 2015 | 292 | 36.6% | 27.6% |
| 2016 | 612 | 38.7% | 29.8% |
| 2017 | 306 | 53.9% | 37.0% |
| 2018 | 265 | 47.2% | 42.1% |
| 2019 | 134 | 33.6% | 33.5% |
| 2020 | 158 | 46.2% | 33.2% |
| 2021 | 254 | 44.1% | 31.8% |
| 2022 | 357 | 54.6% | 40.8% |
| 2023 | 204 | 44.1% | 35.7% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Jackson County, Geology
The ground under Jackson County
PredictedUSGS's geologic map splits Jackson County: 69.5% of its land is high radon potential and 30.5% moderate. The map puts 69.5% of Jackson County in the area it calls Northwestern Dissected Till Plains and 28.6% in Osage Plains, with one smaller area beside them. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Northwestern Dissected Till Plains | Pennsylvanian shales covered by thick loess. | High | 13 | 69.5% |
| Osage Plains | Ordovician dolomite, sandstone, limestone, and shale. | Moderate | 11 | 28.6% |
| Dissected Till Plains | Till-covered Pennsylvanian sandstone, shale, and limestone. | Moderate | 11 | 1.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jackson County beside the ground around it
Jackson County has more high-potential ground than Missouri as a whole: 69.5% of its land against 8.2%. Of the 7 counties that border it, 3 have more high-potential ground, Wyandotte County, KS the most at 100%.
The map rates the ground, not the air in any home.
Local help
Jackson County, Local resources
Radon testing and mitigation in Jackson County
Listed radon businesses with an address in Jackson County:
- Missouri Radon ProgramMissouri Radon Program, run by Missouri Department of Health and Senior Services, offers free or discounted test kits, and answers questions about testing and mitigation in Missouri.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Free radon test kits are available for Missouri residents (limit one per household).
- Compare kits
- Professionals in Missouri27 professionals are listed in Missouri.
Listed radon professionals by town: Kansas City, Lee's Summit, Grandview, Grain Valley
What Missouri's program says
- Phone
- 573-751-6102
- radon@health.mo.gov
What it means
Jackson County, Questions
Questions about radon in Jackson County
Are radon levels high in Jackson County?
In 2023, 44.1% of the radon tests reported to CDC for Jackson County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.4 pCi/L. Of 7 Missouri counties with 30 or more tests for the same period, 1 reported a higher share; pooled, the state comes to 35.7%.
Which counties border Jackson County?
Jackson County borders 7 counties: Wyandotte County, KS, Clay County, MO, Cass County, MO, Johnson County, KS, Lafayette County, MO, Ray County, MO and Johnson County, MO.
Products
Jackson County, Products
Testing a home in Jackson County
In Jackson County, 44.1% of 204 tests reported to CDC in 2023 reached 4 pCi/L, against 35.7% pooled across Missouri. In Zone 1 the year-round level in Jackson 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
Corentium Home 2 battery digital radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Jackson County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Jackson County
Explore
Jackson County, Bordering counties
Counties bordering Jackson County
Calculated by Radon411- Radon levels in Cass County, MOEPA zone 1
62.5%at or above 4 pCi/L
Median 4.6 pCi/L · 24 tests · 18.4 points above Jackson County
- Radon levels in Johnson County, MOEPA zone 2
45.0%at or above 4 pCi/L
Median 3.4 pCi/L · 20 tests · 0.9 points above Jackson County
- Radon levels in Clay County, MOEPA zone 1
44.6%at or above 4 pCi/L
Median 3.6 pCi/L · 83 tests · 0.5 points above Jackson County
- Radon levels in Ray County, MOEPA zone 2
28.6%at or above 4 pCi/L
Median 2.0 pCi/L · 7 tests · 15.5 points below Jackson County
- Radon levels in Lafayette County, MOEPA zone 2
0.0%at or above 4 pCi/L
Median 2.7 pCi/L · 4 tests · 44.1 points below Jackson County
- Radon levels in Wyandotte County, KSEPA zone 1
No CDC figure for 2023; its page reads it against its own neighbours.
- Radon levels in Johnson County, KSEPA zone 1
No CDC figure for 2023; its page reads it against its own neighbours.
Jackson County, Cities and towns
Cities and towns in Jackson County
The Census Bureau estimates 732,994 residents in Jackson County for July 1, 2025, 15,351 more than in 2020 (+2.1%). Packed into its land, that is 1,213 people per square mile. Kansas City, the largest place on its list (521,220 residents in all), extends beyond Jackson County, so no share of the total is worked out for it. CDC's 204 reported tests for 2023 work out to 0.3 per 1,000 residents (2025 estimate), close to Missouri's 0.2.
From Kansas City to River Bend, CDC publishes no figure by town: each reads Jackson County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Kansas Cityextends beyond Jackson County | 521,220 | +2.6% | Counted whole |
| Independenceextends beyond Jackson County | 121,675 | −1.0% | Counted whole |
| Lee's Summitextends beyond Jackson County | 107,514 | +5.9% | Counted whole |
| Blue Springs | 61,632 | +4.9% | 8.4% |
| Raytown | 29,154 | −2.3% | 4.0% |
| Grandview | 26,653 | +0.5% | 3.6% |
| Grain Valley | 16,908 | +7.9% | 2.3% |
| Oak Groveextends beyond Jackson County | 9,370 | +14.4% | Counted whole |
| Pleasant Hillextends beyond Jackson County | 8,956 | +1.9% | Counted whole |
| Greenwoodextends beyond Jackson County | 6,315 | +4.8% | Counted whole |
| Sugar Creekextends beyond Jackson County | 3,209 | −2.7% | Counted whole |
| Buckner | 2,891 | −1.7% | 0.4% |
Places in Jackson County with a city page: 1 of 2
- Lake Lotawana
- Lone Jack
- Lake Tapawingo
- Sibley
- Levasy
- Unity Village
- River Bend
19 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Jackson County is counted whole, so it has no share.
Jackson County, Homes
Homes in Jackson County
Of Jackson County's 333,385 homes, 66% are detached houses, against 70% across Missouri; 20% are in buildings of five or more homes. The homes are older than Missouri's as a whole: half were built before 1970 (1978 for Missouri), and 37% date from before 1960. 59% of occupied homes are lived in by their owner (Missouri: 68%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Jackson County | Missouri |
|---|---|---|
| Housing units | 333,385 | 2,809,501 |
| Detached houses | 66% | 70% |
| In buildings of 5 or more | 20% | 13% |
| Mobile homes | 1% | 5% |
| Built before 1960 | 37% | 28% |
| Built since 2000 | 16% | 21% |
| Middle year built | 1970 | 1978 |
| Owner-occupied | 59% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.