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 Carver County, Minnesota
EPA puts Carver County in Zone 1, its highest radon zone, and 34.6% of its 489 reported radon tests (2023) 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
34.6%
0.0 pts above MN
- Carver
- 34.6%
- Minnesota
- 34.6%
489 tests, 2023
Median result
2.8pCi/L
Below action level
- Carver
- 2.8 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
489
10th of 62 by tests
- Carver
- 489
- Hennepin
- 6,545
Reported to CDC before any fix, 2023
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
47 of 62
Middle half
- Carver
- 34.6%
- Renville
- 75.7%
By share, of 62 with 30+ tests
Read a result for Carver County
Starts at Carver County's median, 2.8 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.8 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. Carver County's median reported result, 2023.
The data
Carver County, At a glance
Carver County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Carver 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 Carver County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 44.8% |
| 2015 | 48.3% |
| 2016 | 34.6% |
| 2017 | 38.8% |
| 2018 | 38.6% |
| 2019 | 30.9% |
| 2020 | 31.9% |
| 2021 | 28.3% |
| 2022 | 32.3% |
| 2023 | 34.6% |
2023: 34.6%. Across these years the share ran from 28.3% to 48.3%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 489 tests reported to CDC for Carver County over 2023, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Carver County, Compared
Carver County radon figures, compared
Calculated by Radon411In Carver County, about 3 in 10 reported tests in 2023 (169 of 489) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 1.2 points higher. Pooled across 86 Minnesota counties, the share is the same 34.6%.
Of 5 neighbours with a figure, 4 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 32.0% (Hennepin County) to 60.0% (Sibley County). By share, Carver County is 47th of 62 Minnesota counties with 30 or more tests for the same period.
Year by year, 2014 opened at 44.8% and 2023 closed at 34.6% (down 10.2 points), with 2015 the high at 48.3%. Half the tests came in under 2.8 pCi/L and half over it; the single highest reached 37.0 pCi/L. Below the action level, 190 tests (38.9%) came in under 2 pCi/L, against 36.6% statewide, and 130 tests (26.6%) fell between 2 and 4, against 28.9% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 34.6% share point the same way here. USGS geology rates 100% of the county's land high radon potential.
The busiest year on file was 2015, with 1,269 tests reported; the quietest, 2019, had 379.
Carver CountyMinnesota, pooled
| Year | Tests | Carver County, at or above 4 pCi/L | Minnesota, pooled |
|---|---|---|---|
| 2014 | 1,229 | 44.8% | 42.9% |
| 2015 | 1,269 | 48.3% | 43.6% |
| 2016 | 953 | 34.6% | 37.0% |
| 2017 | 876 | 38.8% | 38.2% |
| 2018 | 822 | 38.6% | 38.3% |
| 2019 | 379 | 30.9% | 36.1% |
| 2020 | 655 | 31.9% | 31.8% |
| 2021 | 699 | 28.3% | 33.1% |
| 2022 | 539 | 32.3% | 31.6% |
| 2023 | 489 | 34.6% | 34.6% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Carver County, State data
Minnesota's own radon test data
MeasuredWhat Minnesota's own agencies publish about radon tests in Carver 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 Carver 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
34.9%
2,462 properties tested with one or more tests at or above 4 pCi/L
Median result
2.7 pCi/L
Average result
3.6 pCi/L
Tests behind these figures
705 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.
Carver County, Geology
The ground under Carver County
PredictedUSGS's geologic map puts all of Carver 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 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Carver County beside the ground around it
Carver County has more high-potential ground than Minnesota as a whole: 100% of its land against 61.1%. Of the 5 counties that border it, none has as large a share of high-potential ground; Hennepin County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Carver County, Local resources
Radon testing and mitigation in Carver County
Listed radon businesses with an address in Carver 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.
Listed radon professionals by town: Chanhassen, Waconia
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
Carver County, Questions
Questions about radon in Carver County
Are radon levels high in Carver County?
In 2023, 34.6% of the radon tests reported to CDC for Carver County, Minnesota were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.8 pCi/L. Of 62 Minnesota counties with 30 or more tests for the same period, 46 reported a higher share; pooled, the state comes to 34.6%.
Which counties border Carver County?
Carver County borders 5 counties: Scott County, Hennepin County, McLeod County, Wright County and Sibley County.
Products
Carver County, Products
Testing a home in Carver County
In Carver County, 34.6% of 489 tests reported to CDC in 2023 reached 4 pCi/L, against 34.6% pooled across Minnesota. In Zone 1 the year-round level in Carver 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
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Carver County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Carver County
Explore
Carver County, Bordering counties
Counties bordering Carver County
Calculated by Radon411- Radon levels in Sibley CountyEPA zone 1
60.0%at or above 4 pCi/L
Median 5.0 pCi/L · 55 tests · 25.4 points above Carver County
- Radon levels in McLeod CountyEPA zone 1
55.7%at or above 4 pCi/L
Median 4.7 pCi/L · 131 tests · 21.1 points above Carver County
- Radon levels in Wright CountyEPA zone 1
42.4%at or above 4 pCi/L
Median 3.4 pCi/L · 552 tests · 7.8 points above Carver County
- Radon levels in Scott CountyEPA zone 1
41.4%at or above 4 pCi/L
Median 3.4 pCi/L · 669 tests · 6.8 points above Carver County
- Radon levels in Hennepin CountyEPA zone 1
32.0%at or above 4 pCi/L
Median 2.7 pCi/L · 6,545 tests · 2.6 points below Carver County
Carver County, Cities and towns
Cities and towns in Carver County
Carver County is growing: the Census Bureau puts it at 114,379 residents on July 1, 2025, up 6.6% from 107,308 in 2020. That works out to 323 people per square mile of land. Its largest town, Chaska, has 30,513 residents, 26.7% of the total. CDC's 489 reported tests for 2023 work out to 4.3 per 1,000 residents (2025 estimate), close to Minnesota's 3.9.
From Chaska to New Germany, CDC publishes no figure by town: each reads Carver County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Chaska | 30,513 | +9.4% | 26.7% |
| Chanhassenextends beyond Carver County | 25,748 | −0.9% | Counted whole |
| Waconia | 14,113 | +8.2% | 12.3% |
| Victoria | 12,447 | +16.7% | 10.9% |
| Shorewoodextends beyond Carver County | 7,620 | −2.0% | Counted whole |
| Carver | 7,198 | +32.5% | 6.3% |
| Watertown | 4,789 | +2.0% | 4.2% |
| Norwood Young America | 3,777 | −2.4% | 3.3% |
| Mayer | 2,563 | +3.9% | 2.2% |
| Cologne | 2,139 | +3.8% | 1.9% |
| Hamburg | 547 | −3.7% | 0.5% |
| New Germany | 446 | −4.7% | 0.4% |
12 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). A place that extends beyond Carver County is counted whole, so it has no share.
Carver County, Homes
Homes in Carver County
Of Carver County's 41,395 homes, 72% are detached houses, against 66% across Minnesota; 11% are in buildings of five or more homes. Much of Carver County is recent building: 41% of its homes have gone up since 2000 and the middle year built is 1995, against 1978 for Minnesota. 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 | Carver County | Minnesota |
|---|---|---|
| Housing units | 41,395 | 2,519,538 |
| Detached houses | 72% | 66% |
| In buildings of 5 or more | 11% | 19% |
| Mobile homes | 2% | 3% |
| Built before 1960 | 11% | 29% |
| Built since 2000 | 41% | 22% |
| Middle year built | 1995 | 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.