Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Hamilton County, Kansas
EPA puts Hamilton County in Zone 1, its highest radon zone, and only 1 radon test from it is on file with CDC (2020). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
30.1%
Finney County, 58 miles
- Finney
- 30.1%
- Kansas
- 33.7%
Share at 4+ pCi/L, 156 tests, 2019
Ground above low
100.0%
Level with Kansas
- Hamilton
- 100.0%
- Kansas
- 100.0%
Share of land USGS rates moderate or high potential
Tests reported
9
Too few for a share
- Hamilton
- 9
- 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 Hamilton 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
Hamilton County, At a glance
Hamilton County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Hamilton County in
USGS geologic potential: High across 84% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Hamilton County, 2020
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 100.0% |
| 2018 | 11.1% |
| 2019 | 0.0% |
| 2020 | 0.0% |
2020: 0.0%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Hamilton County over 2020, 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: 2020. Measured data period: 2016 to 2020 (every CDC figure on file).
Hamilton County, Compared
Hamilton County radon figures, compared
Calculated by Radon411CDC's largest figure for Hamilton County rests on 9 tests in 2018, 1 of them at or above 4 pCi/L, so each test moves its share by 11.1 points and no rank or comparison is drawn from it. Results reached as high as 5.5 pCi/L, with a middle value of 1.9 pCi/L.
The nearest counties with a figure are Finney County (58 miles away) at 30.1%, Scott County (59 miles away) at 61.5% and Seward County (76 miles away) at 52.2%. 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 Hamilton County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 84% of the county's land high radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Hamilton County, Geology
The ground under Hamilton County
PredictedMost of the ground under Hamilton County is one class on USGS's geologic map: 83.6% of its land is high radon potential, with 16.4% moderate. The map puts 68.9% of Hamilton County in the area it calls Ogallala Formation and 16.4% in Arkansas River Lowlands, with one smaller area beside them. USGS gives the first a radon index of 12, in the high band (12 to 17), and the second 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Ogallala Formation | Tertiary sandstone, in part covered by windblown eolian sand and loess deposits. | High | 12 | 68.9% |
| Arkansas River Lowlands | Dune sands and alluvium. | Moderate | 10 | 16.4% |
| High Plains | Quaternary deposits and Cretaceous marine shales that locally have a high radiometric signature. | High | 12 | 14.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hamilton County beside the ground around it
Hamilton County has more high-potential ground than Kansas as a whole: 83.6% of its land against 59.9%. Of the 6 counties that border it, 4 have more high-potential ground, Greeley County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Hamilton County, Local resources
Radon testing and mitigation in Hamilton 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
Hamilton County, Questions
Questions about radon in Hamilton County
Are radon levels high in Hamilton County?
In 2020, 0.0% of the radon tests reported to CDC for Hamilton County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.8 pCi/L. Of the 8 nearest counties with a figure, within 148 miles, the share of tests at or above 4 pCi/L runs from 30.1% to 66.7%.
Which counties border Hamilton County?
Hamilton County borders 6 counties: Kearny County, KS, Greeley County, KS, Prowers County, CO, Stanton County, KS, Wichita County, KS and Grant County, KS.
Products
Hamilton County, Products
Testing a home in Hamilton County
No CDC figure names Hamilton County; the nearest county with one, Finney County (58 miles away), reported 30.1% 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 Hamilton 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
MonitorPYZYCKYH
RD17 plug-in radon detector with a rechargeable battery and color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Hamilton County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Hamilton County
Explore
Hamilton County, Bordering counties
Counties bordering Hamilton County
Calculated by Radon411- Radon levels in Greeley County, KSEPA zone 1
100.0%at or above 4 pCi/L
Median 7.5 pCi/L · 1 test
- Radon levels in Prowers County, COEPA zone 1
75.0%at or above 4 pCi/L
Median 5.8 pCi/L · 16 tests
- Radon levels in Kearny County, KSEPA zone 1
62.5%at or above 4 pCi/L
Median 5.5 pCi/L · 8 tests
- Radon levels in Grant County, KSEPA zone 1
55.6%at or above 4 pCi/L
Median 4.2 pCi/L · 18 tests
- Radon levels in Wichita County, KSEPA zone 1
33.3%at or above 4 pCi/L
Median 3.9 pCi/L · 3 tests
- Radon levels in Stanton County, KSEPA zone 1
0.0%at or above 4 pCi/L
Median 3.9 pCi/L · 1 test
Hamilton County, Cities and towns
Cities and towns in Hamilton County
Hamilton County's population has barely moved since 2020: 2,500 residents on July 1, 2025 against 2,489 then, by the Census Bureau's estimates. Spread over its land, that is 2.5 people to the square mile. Syracuse alone is home to 1,810 of them, 72.4% of the total. Together its 2 incorporated places hold 75.5% of those residents; the other 24.5% live outside any of them. Reported testing is thin here: 9 tests over 2018, or 3.6 for every 1,000 residents (2025 estimate), where Kansas as a whole comes to 7.8.
From Syracuse to Coolidge, CDC publishes no figure by town: each reads Hamilton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Syracuse | 1,810 | +0.2% | 72.4% |
| Coolidge | 78 | Level | 3.1% |
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).
Hamilton County, Homes
Homes in Hamilton County
Hamilton County is a place of houses on their own lots: 76% of its 1,030 homes are detached single-family houses, against 72% across Kansas. Half of its homes were built before 1969, close to Kansas' 1975: 39% date from before 1960 and 4% from 2000 or later. Owners live in 81% of the occupied homes (Kansas: 67%), so for most households a test and a fix are their own to order.
| Homes | Hamilton County | Kansas |
|---|---|---|
| Housing units | 1,030 | 1,285,221 |
| Detached houses | 76% | 72% |
| In buildings of 5 or more | 3% | 13% |
| Mobile homes | 17% | 4% |
| Built before 1960 | 39% | 33% |
| Built since 2000 | 4% | 20% |
| Middle year built | 1969 | 1975 |
| Owner-occupied | 81% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.