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 Trego County, Kansas
EPA puts Trego County in Zone 1, its highest radon zone, and only 6 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
41.6%
Ellis County
- Ellis
- 41.6%
1 of 5 neighbours have 30+ tests, 2019
Nearest county
41.6%
Ellis County, 30 miles
- Ellis
- 41.6%
- Kansas
- 33.7%
Share at 4+ pCi/L, 209 tests, 2019
Ground above low
100.0%
Level with Kansas
- Trego
- 100.0%
- Kansas
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
16
Too few for a share
- Trego
- 16
- Needed
- 30
2018
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Read a result for Trego 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
Trego County, At a glance
Trego County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Trego County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Trego County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 86.7% |
| 2017 | 66.7% |
| 2018 | 50.0% |
| 2019 | 66.7% |
| 2020 | 73.3% |
| 2021 | 75.0% |
| 2022 | 83.3% |
2022: 83.3%. Across these years the share ran from 50.0% to 86.7%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 6 tests were reported to CDC for Trego County over 2022, 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: 2022. Measured data period: 2016 to 2022 (every CDC figure on file).
Trego County, Compared
Trego County radon figures, compared
Calculated by Radon411CDC's largest figure for Trego County rests on 16 tests in 2018, 8 of them at or above 4 pCi/L, so each test moves its share by 6.3 points and no rank or comparison is drawn from it. Results reached as high as 10.4 pCi/L, with a middle value of 4.3 pCi/L.
Ellis County, the one bordering county with a figure in 2019, reported 41.6% of its tests at or above 4 pCi/L. Farther out, Pawnee County (61 miles away) at 66.7%, Scott County (63 miles away) at 61.5% and Phillips County (66 miles away) at 71.4% have figures too. Pooled across 102 Kansas counties, 33.7% of reported tests reached that level; across every county in the country with a figure, 29.0%.
Statewide for the same period, Jewell County reported the highest share (71.9%) and Reno County the lowest (20.8%). EPA's 1993 map puts Trego County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land high radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Trego County, Geology
The ground under Trego County
PredictedUSGS's geologic map puts all of Trego County's mapped land in one class: high radon potential. The map puts 53.1% of Trego County in the area it calls Smoky Hills and 46.9% in Ogallala Formation. USGS gives both a radon index of 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Smoky Hills | Cretaceous marine sandstone, shale, and siltstone covered by discontinuous loess deposits. | High | 12 | 53.1% |
| Ogallala Formation | Tertiary sandstone, in part covered by windblown eolian sand and loess deposits. | High | 12 | 46.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Trego County beside the ground around it
Trego County has more high-potential ground than Kansas as a whole: 100% of its land against 59.9%. Of the 5 counties that border it, none has as large a share of high-potential ground; Gove County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Trego County, Local resources
Radon testing and mitigation in Trego County
- Kansas Radon ProgramKansas Radon Program answers questions about testing, mitigation and the rules in Kansas.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 Kansas178 professionals are listed in Kansas.
What Kansas's program says
- Phone
- (800) 693-5343
What it means
Trego County, Questions
Questions about radon in Trego County
Are radon levels high in Trego County?
In 2022, 83.3% of the radon tests reported to CDC for Trego County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.6 pCi/L. Ellis County, the one bordering county with a figure in 2019, reported 41.6% of its tests at or above 4 pCi/L.
Which counties border Trego County?
Trego County borders 5 counties: Ness County, Graham County, Ellis County, Gove County and Rooks County.
Products
Trego County, Products
Testing a home in Trego County
No CDC figure names Trego County; the nearest county with one, Ellis County (30 miles away), reported 41.6% of its tests at or above 4 pCi/L in 2019, the only reading nearby until a test of this home. In Zone 1 the year-round level in Trego 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
Hello Radon C battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Trego County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Trego County
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Trego County, Bordering counties
Counties bordering Trego County
Calculated by Radon411- Radon levels in Ness CountyEPA zone 1
83.3%at or above 4 pCi/L
Median 10.4 pCi/L · 12 tests
- Radon levels in Rooks CountyEPA zone 1
77.8%at or above 4 pCi/L
Median 6.0 pCi/L · 9 tests
- Radon levels in Gove CountyEPA zone 1
75.0%at or above 4 pCi/L
Median 9.1 pCi/L · 8 tests
- Radon levels in Ellis CountyEPA zone 1
41.6%at or above 4 pCi/L
Median 3.3 pCi/L · 209 tests
- Radon levels in Graham CountyEPA zone 1
No CDC figure for 2019; its page reads it against its own neighbours.
Trego County, Cities and towns
Cities and towns in Trego County
About 2,740 people live in Trego County by the Census Bureau's estimate for July 1, 2025, 69 fewer than in 2020 (−2.5%). Spread over its land, that is 3.1 people to the square mile. WaKeeney alone is home to 1,746 of them, 63.7% of the total. Together its 2 incorporated places hold 67.0% of those residents; the other 33.0% live outside any of them. CDC's 16 reported tests for 2018 work out to 5.8 per 1,000 residents (2025 estimate), close to Kansas' 7.8.
From WaKeeney to Collyer, CDC publishes no figure by town: each reads Trego County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| WaKeeney | 1,746 | −2.6% | 63.7% |
| Collyer | 91 | −4.2% | 3.3% |
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).
Trego County, Homes
Homes in Trego County
Trego County is a place of houses on their own lots: 89% of its 1,673 homes are detached single-family houses, against 72% across Kansas. The homes are older than Kansas' as a whole: half were built before 1963 (1975 for Kansas), and 45% date from before 1960. Owners live in 78% of the occupied homes (Kansas: 67%), so for most households a test and a fix are their own to order.
| Homes | Trego County | Kansas |
|---|---|---|
| Housing units | 1,673 | 1,285,221 |
| Detached houses | 89% | 72% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 4% | 4% |
| Built before 1960 | 45% | 33% |
| Built since 2000 | 3% | 20% |
| Middle year built | 1963 | 1975 |
| Owner-occupied | 78% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.