Listed for: Testing
Verified:Kansas state license
Call Axiom Service Professionals at (816) 379-9014No website listed
Locations and reports
Radon in Kansas City, Missouri
Kansas City lies in 4 counties, in EPA Zone 1. Homes with elevated levels occur in all three zones, so the only way to know your home's level is to test it.
Data checked By Radon411Methodology
Share at 4+ pCi/L
44.1%
8.4 pts above MO
- Jackson
- 44.1%
- Missouri
- 35.7%
Jackson, 2nd of 7 in MO, 2023
Median result
3.4pCi/L
Below action level
- Jackson
- 3.4 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Jackson's tests, 2023
Highest county
44.6%
Clay
- Clay
- 44.6%
- Platte
- 37.8%
4 counties, 3 with 30+ tests, 2023
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
Jackson; Clay Zone 1, Platte Zone 1, Cass Zone 1
Tests reported
204
In Jackson
- Jackson
- 204
- Platte
- 1,789
Reported to CDC before any fix, 2023
Read a result for Kansas City
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
Kansas City, What is published
What is published for Kansas City
Information:
Every figure for Kansas City is a county's
Radon data is published by county, not by city, and Kansas City reaches into 4 counties: Jackson County, Clay County, Platte County and Cass County. Each has its own EPA zone and its own CDC test figures, set side by side below and each labelled with its county. Only a test tells you about one home.
Kansas City covers 315 square miles of land across 4 counties: 49.3% in Jackson County, 28.4% in Clay County, 22.0% in Platte County and 0.3% in Cass County. About 521,220 people live there, 1,656 to the square mile.
Kansas City, Counties
Kansas City's counties, side by side
MeasuredEach county's own EPA zone and its own published CDC figures for 2023, the newest period any of them has. A county without a figure for that period is shown without one, never with a figure from another year.
- Jackson County
- EPA zone
- Zone 1: Highest predicted potential
- At or above 4 pCi/L
- 44.1%
- Median result
- 3.4 pCi/L
- Tests reported
- 204 tests
- Annual years on file
- 10
- Clay County
- EPA zone
- Zone 1: Highest predicted potential
- At or above 4 pCi/L
- 44.6%
- Median result
- 3.6 pCi/L
- Tests reported
- 83 tests
- Annual years on file
- 10
- Platte County
- EPA zone
- Zone 1: Highest predicted potential
- At or above 4 pCi/L
- 37.9%
- Median result
- 3.0 pCi/L
- Tests reported
- 29 tests
- Annual years on file
- 10
- Cass County
- EPA zone
- Zone 1: Highest predicted potential
- At or above 4 pCi/L
- 62.5%
- Median result
- 4.6 pCi/L
- Tests reported
- 24 tests
- Annual years on file
- 10
| County | EPA zone | Reported tests at or above 4 pCi/L | Median reported result | Tests reported | Annual years on file |
|---|---|---|---|---|---|
| Jackson County | Zone 1: Highest predicted potential | 44.1% | 3.4 pCi/L | 204 tests | 10 |
| Clay County | Zone 1: Highest predicted potential | 44.6% | 3.6 pCi/L | 83 tests | 10 |
| Platte County | Zone 1: Highest predicted potential | 37.9% | 3.0 pCi/L | 29 tests | 10 |
| Cass County | Zone 1: Highest predicted potential | 62.5% | 4.6 pCi/L | 24 tests | 10 |
Kansas City spans 4 counties, each with its own EPA zone and its own CDC figure: Jackson County (Zone 1, 44.1% of 204 tests), Clay County (Zone 1, 44.6% of 83 tests), Platte County (Zone 1, 37.9% of 29 tests) and Cass County (Zone 1, 62.5% of 24 tests).
Jackson County ranks 2nd of 7 Missouri counties with 30 or more tests for that period, 8.4 points above the 35.7% pooled across Missouri's counties, 10.7 points above the national pool of 33.4%. Of the city's other counties, Clay County reported 44.6%, Platte County reported 37.9% and Cass County reported 62.5%.
Measured from the middle of Kansas City, the nearest counties with a CDC figure for 2023 are Boone County (121 miles, 42.9% of 63 tests), Greene County (145 miles, 27.1% of 48 tests) and St. Charles County (210 miles, 40.8% of 103 tests). Across the 5 nearest, the share at or above 4 pCi/L runs from 22.6% to 42.9%; the farthest of them, Jefferson County, is 225 miles away at 38.9%.
The directory lists 12 businesses with an address in Kansas City, 11 for testing and 4 for mitigation. Missouri's other cities with a page of their own: Columbia, Springfield and Lee's Summit.
Against Missouri and its other counties
Shares of tests people chose to run and report, by county (2023); the state's is its counties' counts added up, calculated by Radon411. Only a test measures a home.
The counties around Kansas City
By distance from the middle of Kansas City; counties with 30 or more tests.
The median reported pre-mitigation result for 2023 was 3.4 pCi/L in Jackson County, 3.6 pCi/L in Clay County, 3.0 pCi/L in Platte County and 4.6 pCi/L in Cass County.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2023.
Kansas City, Geology
The ground under Kansas City
PredictedUSGS's geologic map puts all of Kansas City's mapped land in one class: high radon potential. All of it lies in the area the map calls Northwestern Dissected Till Plains, to which USGS gives a radon index of 13, in the high band (12 to 17).
| 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 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Kansas City beside its counties and Missouri
Kansas City sits on more high-potential ground than Jackson County as a whole: 100% of the city against 69.5% of the county. Kansas City has more high-potential ground than Missouri as a whole: 100% of its land against 8.2%.
The map rates the ground, not the air in any home.
Kansas City, Homes
Homes in Kansas City
Of Kansas City's 243,692 homes, 61% are detached houses, against 66% across Jackson County; 27% are in buildings of five or more homes. Half of its homes were built before 1968, close to Jackson County's 1970: 40% date from before 1960 and 19% from 2000 or later. 55% of occupied homes are lived in by their owner (Jackson County: 59%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Kansas City | Jackson County | Missouri |
|---|---|---|---|
| Housing units | 243,692 | 333,385 | 2,809,501 |
| Detached houses | 61% | 66% | 70% |
| In buildings of 5 or more | 27% | 20% | 13% |
| Mobile homes | 1% | 1% | 5% |
| Built before 1960 | 40% | 37% | 28% |
| Built since 2000 | 19% | 16% | 21% |
| Middle year built | 1968 | 1970 | 1978 |
| Owner-occupied | 55% | 59% | 68% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Kansas City, Professionals
Radon professionals listed in Kansas City
Businesses whose listed city is Kansas City, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.
Radon professionals listed in Kansas City: 1 of 6
12 listings with Kansas City as the city. See radon mitigation and testing in Kansas City, or all radon professionals in Missouri.
Kansas City, Local resources
Local resources for Kansas City
Who to ask in Missouri: its radon program, test kits and professionals.
- Missouri Radon ProgramRun by Missouri Department of Health and Senior Services, phone 573-751-6102.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 Missouri12 listings cover Kansas City.
The program's own words on licensing are on the Missouri page.
What it means
Kansas City, Questions
Questions about radon in Kansas City
What radon zone is Kansas City in?
All 4 counties Kansas City reaches into (Jackson County, Clay County, Platte County and Cass County) are in Zone 1, the map's highest class: a predicted county average above 4 pCi/L. EPA zones counties, not cities, so that is the zone for every part of Kansas City.
What are radon levels in Kansas City?
High results are ordinary around Kansas City: 44.1% of the 204 tests reported from Jackson County for 2023 were at or above 4 pCi/L, the level at which EPA says to fix a home. The median reported result was 3.4 pCi/L. Clay County reported 44.6% of 83 tests, Platte County reported 37.9% of 29 tests and Cass County reported 62.5% of 24 tests; the counties are kept apart.
Should I test my home in Kansas City?
Yes. Jackson County reported about 90 of its 204 tests at or above 4 pCi/L. That is above Missouri's pooled 35.7%, and ranks Jackson County 2nd of the 7 Missouri counties with 30 or more tests. Which homes they were, no map can say. How to test a home.
What ground is Kansas City built on, as far as radon goes?
USGS's geologic map puts all of Kansas City on one named area, "Northwestern Dissected Till Plains", rated high for radon potential, radon index 13.
Is radon higher in the counties around Kansas City?
Lower: none of the 5 nearest counties with a figure matches Jackson County's 44.1%. The closest to it is Boone County (42.9%, 121 miles off); the lowest is St. Louis County (22.6%, 224 miles off).
Who tests for or fixes radon in Kansas City?
Kansas City is the address of 12 businesses in Radon411's directory, 11 listed for testing and 4 for mitigation. Each entry names the public list it came from. Radon professionals in Kansas City.
The answers use the published figures of Jackson County, Clay County, Platte County and Cass County, the counties Kansas City lies in.
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