Listed for: TestingMitigation
Verified:Kansas state license
Call Ad Astra Home Inspections at (785) 393-5527No website listed
Locations and reports
Radon in Lawrence, Kansas
EPA puts Douglas County, where Lawrence is, in Zone 1, its highest radon zone, and 25.8% of its 868 reported radon tests (2022) were 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
25.8%
6.2 pts below KS
- Douglas
- 25.8%
- Kansas
- 32.0%
Douglas, 29th of 38 in KS, 2022
Median result
1.8pCi/L
Below action level
- Douglas
- 1.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Douglas's tests, 2022
Nearest county
39.6%
Jefferson, 20 miles
- Jefferson
- 39.6%
- Douglas
- 25.8%
53 tests, 2022
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
Douglas, where Lawrence is
Tests reported
868
In Douglas
- Douglas
- 868
- Jefferson
- 53
Reported to CDC before any fix, 2022
Read a result for Lawrence
Starts at Douglas County's median, 1.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.8 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. Douglas County's median reported result, 2022.
The data
Lawrence, What is published
What is published for Lawrence
Information:
Every figure for Lawrence is a county's
Radon data is published by county, not by city, so for Lawrence it is Douglas County's: its EPA zone (Zone 1) and the 868 tests reported to CDC for 2022. Only a test tells you about one home.
Lawrence covers 34.2 square miles of land, all of it in Douglas County. About 96,367 people live there, 2,822 to the square mile.
Lawrence, Counties
The county Lawrence lies in
MeasuredDouglas County's EPA zone and the figures CDC publishes for it, 2022.
Douglas CountyZone 1Highest predicted potential
- 25.8%
- Reported tests at or above 4 pCi/L
- 1.8 pCi/L
- Median reported result
- 868 tests
- Tests reported to CDC
- 7
- Annual years on file
Douglas County ranks 29th of 38 Kansas counties with 30 or more tests for that period, 6.2 points below the 32.0% pooled across Kansas's counties, 1.9 points above the national pool of 23.9%.
The counties nearest Lawrence with a CDC figure for 2022, measured from the middle of the city: Jefferson County (20 miles, 39.6% of 53 tests), Leavenworth County (21 miles, 26.8% of 515 tests) and Johnson County (24 miles, 41.2% of 5,240 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 26.8% to 41.7%; the farthest of them, Atchison County, is 40 miles away at 41.7%.
The directory lists 8 businesses with an address in Lawrence, 8 for testing and 3 for mitigation. Kansas's other cities with a page of their own: Wichita, Manhattan and Topeka.
The counties around Lawrence
By distance from the middle of Lawrence; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2022.
Lawrence, Geology
The ground under Lawrence
PredictedUSGS's geologic map puts all of Lawrence's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Glaciated Area, to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Glaciated Area | Glacial till underlain by Pennsylvanian and Permian marine and nonmarine sedimentary shale, sandstone, limestone, coal. | Moderate | 9 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lawrence beside its county and Kansas
All of Lawrence, like all of Douglas County, is rated moderate. Across Kansas 59.9% of the land is rated high; none of Lawrence's is.
The map rates the ground, not the air in any home.
Lawrence, Homes
Homes in Lawrence
Lawrence has 44,034 homes, and many share a building: 32% are in buildings of five or more, 46% are detached houses, against 53% across Douglas County. Half of its homes were built before 1988, close to Douglas County's 1988: 17% date from before 1960 and 30% from 2000 or later. Most occupied homes here are rented: owners live in 43% (Douglas County: 50%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Lawrence | Douglas County | Kansas |
|---|---|---|---|
| Housing units | 44,034 | 53,308 | 1,285,221 |
| Detached houses | 46% | 53% | 72% |
| In buildings of 5 or more | 32% | 27% | 13% |
| Mobile homes | 2% | 2% | 4% |
| Built before 1960 | 17% | 18% | 33% |
| Built since 2000 | 30% | 30% | 20% |
| Middle year built | 1988 | 1988 | 1975 |
| Owner-occupied | 43% | 50% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Lawrence, Professionals
Radon professionals listed in Lawrence
Businesses whose listed city is Lawrence, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.
Radon professionals listed in Lawrence: 1 of 6
8 listings with Lawrence as the city. See radon mitigation and testing in Lawrence, or all radon professionals in Kansas.
Lawrence, Local resources
Local resources for Lawrence
Who to ask in Kansas: its radon program, test kits and professionals.
What it means
Lawrence, Questions
Questions about radon in Lawrence
What radon zone is Lawrence in?
Lawrence has no zone of its own: it shares Douglas County's, Zone 1, the map's highest class: a predicted county average above 4 pCi/L.
What are radon levels in Lawrence?
A high result is no surprise around Lawrence: 25.8% of 868 tests reported from Douglas County for 2022 reached 4 pCi/L or more. The median reported result was 1.8 pCi/L.
Should I test my home in Lawrence?
Yes. About 224 of the 868 tests reported from Douglas County were at or above 4 pCi/L. That is below Kansas' pooled 32.0%, and still not a reason to skip it, and ranks Douglas County 29th of the 38 Kansas counties with 30 or more tests. No map says which homes those are. How to test a home.
What ground is Lawrence built on, as far as radon goes?
USGS's geologic map puts all of Lawrence on one named area, "Glaciated Area", rated moderate for radon potential, radon index 9.
Is radon higher in the counties around Lawrence?
Yes, in every direction measured. Each of the 8 nearest counties with a figure reports a larger share of high tests than Douglas County's 25.8%; the highest is Atchison County (41.7%, 40 miles off).
Who tests for or fixes radon in Lawrence?
Radon411's directory has 8 businesses with an address in Lawrence, 8 listed for testing and 3 for mitigation. Every entry names the public list it was taken from. Radon professionals in Lawrence.
The answers use the published figures of Douglas County, the county Lawrence lies in.
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