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 Murray County, Minnesota
EPA puts Murray County in Zone 1, its highest radon zone, and only 25 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
75.4%
31.2 pts above MN
- Murray
- 75.4%
- Minnesota
- 44.2%
244 tests, 2005 to 2014
Median result
6.5pCi/L
Action level reached
- Murray
- 6.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2005 to 2014
Tests reported
244
65th of 87 by tests
- Murray
- 244
- Hennepin
- 32,450
Reported to CDC before any fix, 2005 to 2014
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Minnesota
3 of 87
Top quarter
- Murray
- 75.4%
- Rock
- 85.0%
By share, of 87 with 30+ tests
Read a result for Murray County
Starts at Murray County's median, 6.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 6.5 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. Murray County's median reported result, 2005 to 2014.
The data
Murray County, At a glance
Murray County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Murray 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 Murray County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 77.8% |
| 2015 | 37.0% |
| 2016 | 43.4% |
| 2017 | 83.9% |
| 2018 | 66.7% |
| 2019 | 85.0% |
| 2020 | 84.4% |
| 2021 | 60.0% |
| 2022 | 72.0% |
| 2023 | 72.0% |
2023: 72.0%. Across these years the share ran from 37.0% to 85.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 25 tests were reported to CDC for Murray County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Murray County, Compared
Murray County radon figures, compared
Calculated by Radon411More than half: 75.4% of the 244 radon tests reported to CDC for Murray County over the 2005 to 2014 laboratory totals read at least 4 pCi/L. That places it 3rd of 87 Minnesota counties with 30 or more tests for the same period. That is 31.2 points above the 44.2% pooled from 87 Minnesota counties.
The newest figure, in 2023, counts only 25 tests (72.0% at or above 4 pCi/L), too few to compare, so this reading uses the 244-test figure.
The median result, 6.5 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 57.2 pCi/L. The rest split 9.8% under 2 pCi/L and 14.8% from 2 to 4 (Minnesota: 26.4% and 29.3%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 75.4% share point the same way here.
1 of its 6 bordering counties with figures ran higher, led by Rock County at 85.0%; Lyon County reported 68.5%. Statewide for the same period, Rock County reported the highest share (85.0%) and Anoka County the lowest (16.4%).
The busiest year on file was 2015, with 92 tests reported; the quietest, 2019, had 20.
Over 7 years of annual figures the share fell 17.8 points, from 77.8% in 2014 to 60.0% in 2021; its peak was 84.4% in 2020. Nationally, every county with a figure for the same period pools to 36.0%; Murray County sits 39.4 points above it. CDC also counts 12 tests taken after mitigation in Murray County for the same period: tests in homes where a fix was already in.
Murray CountyMinnesota, pooled
60.0% % of tests33.1% % of tests
| Year | Tests | Murray County, at or above 4 pCi/L | Minnesota, pooled |
|---|---|---|---|
| 2014 | 54 | 77.8% | 42.9% |
| 2015 | 92 | 37.0% | 43.6% |
| 2016 | 53 | 43.4% | 37.0% |
| 2017 | 56 | 83.9% | 38.2% |
| 2018 | 30 | 66.7% | 38.3% |
| 2020 | 32 | 84.4% | 31.8% |
| 2021 | 30 | 60.0% | 33.1% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Murray County, State data
Minnesota's own radon test data
MeasuredWhat Minnesota's own agencies publish about radon tests in Murray County, with their period. These are not CDC's figures and are never added to them.
MeasuredState figures, not CDC's
What the Minnesota Department of Health reports for Murray County
Radon Testing (MN Public Health Data Access Portal): home radon tests reported voluntarily by private laboratories and licensed radon measurement professionals, counted by property. Period: 2016-2025.
Share with one or more tests at or above 4 pCi/L
73.7%
241 properties tested with one or more tests at or above 4 pCi/L
Median result
6.4 pCi/L
Average result
8.6 pCi/L
Tests behind these figures
33 properties tested a year on average
- MDH says these data do not include all of the radon tests conducted in Minnesota.
- Post-mitigation tests are excluded from the averages and the median; the percentages use each property's highest test.
- Each home is unique and can have very different results than a neighbor's home; the only way to know is to test.
- These figures describe tests reported to the Minnesota Department of Health in this area. They count a different set of tests than CDC's figures and are not a reading of any one home.
Measured: Minnesota Department of Health data, 2016-2025.
Murray County, Geology
The ground under Murray County
PredictedUSGS's geologic map puts all of Murray County's mapped land in one class: high radon potential. All of it lies in the area the map calls Central Lowland-Till Prairie, to which USGS gives a radon index of 14, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Central Lowland-Till Prairie | Silty and clayey till derived from shale and sandstone. | High | 14 | 99.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Murray County beside the ground around it
Murray County has more high-potential ground than Minnesota as a whole: 100% of its land against 61.1%. Of the 6 counties that border it, none has as large a share of high-potential ground; Cottonwood County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Murray County, Local resources
Radon testing and mitigation in Murray County
- MDH Indoor Air UnitMDH Indoor Air Unit, run by MN Dept. of Health, licenses or certifies radon professionals and states the rule for disclosing radon when a home is sold, and answers questions about testing and mitigation in Minnesota.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 Minnesota255 professionals are listed in Minnesota.
What Minnesota's program says
- Phone
- 651-201-4601
- health.indoorair@state.mn.us
- Licensing of radon professionals
The Radon Licensing Act requires anyone who performs a radon test or radon mitigation, in a building they do not own or lease, must be licensed by MDH.
- Disclosure when a home is sold or rented
The Minnesota Radon Awareness Act requires specific disclosure and education be provided to potential home buyers during residential real estate transactions in Minnesota.
What it means
Murray County, Questions
Questions about radon in Murray County
Are radon levels high in Murray County?
In 2023, 72.0% of the radon tests reported to CDC for Murray County, Minnesota were at or above 4 pCi/L, and the median reported pre-mitigation result was 8.1 pCi/L. Of 87 Minnesota counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 44.2%.
Which counties border Murray County?
Murray County borders 6 counties: Nobles County, Lyon County, Pipestone County, Cottonwood County, Rock County and Redwood County.
Products
Murray County, Products
Testing a home in Murray County
In Murray County, 75.4% of 244 tests reported to CDC over the 2005 to 2014 laboratory totals reached 4 pCi/L, against 44.2% pooled across Minnesota. In Zone 1 the year-round level in Murray 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
RadonEye RD200 plug-in continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Murray County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Murray County
Explore
Murray County, Bordering counties
Counties bordering Murray County
Calculated by Radon411- Radon levels in Rock CountyEPA zone 1
85.0%at or above 4 pCi/L
Median 7.8 pCi/L · 206 tests · 9.6 points above Murray County
- Radon levels in Nobles CountyEPA zone 1
72.6%at or above 4 pCi/L
Median 7.1 pCi/L · 230 tests · 2.8 points below Murray County
- Radon levels in Pipestone CountyEPA zone 1
72.1%at or above 4 pCi/L
Median 5.8 pCi/L · 323 tests · 3.3 points below Murray County
- Radon levels in Redwood CountyEPA zone 1
70.2%at or above 4 pCi/L
Median 6.3 pCi/L · 540 tests · 5.2 points below Murray County
- Radon levels in Cottonwood CountyEPA zone 1
70.0%at or above 4 pCi/L
Median 6.7 pCi/L · 383 tests · 5.4 points below Murray County
- Radon levels in Lyon CountyEPA zone 1
68.5%at or above 4 pCi/L
Median 5.8 pCi/L · 905 tests · 6.9 points below Murray County
Murray County, Cities and towns
Cities and towns in Murray County
About 7,942 people live in Murray County by the Census Bureau's estimate for July 1, 2025, 235 fewer than in 2020 (−2.9%). That works out to 11 people per square mile of land. Its largest town, Slayton, has 1,930 residents, 24.3% of the total. Together its 9 incorporated places hold 54.5% of those residents; the other 45.5% live outside any of them. Testing is reported here more often than across the state: CDC's 244 reported tests for 2005 to 2014 come to 30.7 for every 1,000 residents (2025 estimate), against 19.9 for Minnesota.
From Slayton to Dovray, CDC publishes no figure by town: each reads Murray County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Slayton | 1,930 | −3.9% | 24.3% |
| Fulda | 1,303 | −4.3% | 16.4% |
| Chandler | 262 | −6.1% | 3.3% |
| Lake Wilson | 246 | −5.0% | 3.1% |
| Currie | 210 | −5.8% | 2.6% |
| Iona | 164 | −1.2% | 2.1% |
| Avoca | 105 | −5.4% | 1.3% |
| Hadley | 54 | −1.8% | 0.7% |
| Dovray | 53 | −5.4% | 0.7% |
9 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).
Murray County, Homes
Homes in Murray County
Murray County is a place of houses on their own lots: 90% of its 4,401 homes are detached single-family houses, against 66% across Minnesota. The homes are older than Minnesota's as a whole: half were built before 1963 (1978 for Minnesota), and 47% date from before 1960. Owners live in 82% of the occupied homes (Minnesota: 72%), so for most households a test and a fix are their own to order.
| Homes | Murray County | Minnesota |
|---|---|---|
| Housing units | 4,401 | 2,519,538 |
| Detached houses | 90% | 66% |
| In buildings of 5 or more | 4% | 19% |
| Mobile homes | 2% | 3% |
| Built before 1960 | 47% | 29% |
| Built since 2000 | 11% | 22% |
| Middle year built | 1963 | 1978 |
| Owner-occupied | 82% | 72% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.