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Radon Levels in Burnett County, Wisconsin

EPA puts Burnett County in Zone 2, its middle radon zone, and 23.1% of its 52 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

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    23.1%

    12.6 pts below WI

    Burnett
    23.1%
    Wisconsin
    35.7%

    52 tests, 2023

  • Median result

    1.6pCi/L

    Below action level

    Burnett
    1.6 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    52

    57th of 69 by tests

    Burnett
    52
    Dane
    2,887

    Reported to CDC before any fix, 2023

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Wisconsin

    56 of 69

    Lowest quarter

    Burnett
    23.1%
    Langlade
    65.8%

    By share, of 69 with 30+ tests

Read a result for Burnett County

Starts at Burnett County's median, 1.6 pCi/L

1.6pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 1.6 pCi/L

Below 2 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Burnett County's median reported result, 2023.

Interpret this reading

The data

Burnett County, At a glance

Burnett County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Burnett County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Burnett County, 2023

Share of reported tests at or above 4 pCi/L, by year, Burnett County
Share of reported tests at or above 4 pCi/L, by year, Burnett County
YearShare of reported tests at or above 4 pCi/L
201440.6%
201534.8%
201633.3%
201724.1%
201932.1%
20208.7%
202125.0%
202230.6%
202323.1%

2023: 23.1%. Across these years the share ran from 8.7% to 40.6%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 52 tests reported to CDC for Burnett 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).

How to read these figures

Burnett County, Compared

Burnett County radon figures, compared

Calculated by Radon411

Burnett County's 52 reported tests in 2023 had a middle value of 1.6 pCi/L and a maximum of 10.4 pCi/L, and 23.1% reached 4 pCi/L. Wisconsin as a whole (72 Wisconsin counties, pooled) comes to 35.7%: 12.6 points higher than here.

Among its state's counties it ranks 56th of 69 Wisconsin counties with 30 or more tests for the same period. Statewide for the same period, Langlade County reported the highest share (65.8%) and Bayfield County the lowest (5.7%).

Below the action level, 30 tests (57.7%) came in under 2 pCi/L, against 41.4% statewide, and 10 tests (19.2%) fell between 2 and 4, against 23.0% statewide. The busiest year on file was 2023, with 52 tests reported; the quietest, 2020, had 23.

EPA's 1993 zone map puts Burnett County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Next door, the shares run from 9.1% in Douglas County to 44.9% in Washburn County, with Douglas County below Burnett County. Over 5 years of annual figures the share fell 17.5 points, from 40.6% in 2014 to 23.1% in 2023; its peak was 40.6% in 2014.

Share of reported tests at or above 4 pCi/L by year, Burnett County against Wisconsin2014 to 2023, years with 30 or more tests: Burnett County 40.6% to 23.1%, the state's pooled share 35.7% in 2023.
Burnett CountyWisconsin, pooled
Share of reported tests at or above 4 pCi/L by year, Burnett County against Wisconsin: data table
YearTestsBurnett County, at or above 4 pCi/LWisconsin, pooled
20143240.6%51.1%
20163033.3%45.2%
20213625.0%39.9%
20224930.6%42.9%
20235223.1%35.7%
Burnett County against Wisconsin, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Burnett County
Burnett County5223.1%1.6 pCi/LThis county
Wisconsin, pooled72 counties, pooled20,87935.7%Not pooled+12.6 points
United States, pooled642 counties, pooled128,74033.4%Not pooled+10.3 points
Langlade Countyhighest in the state22565.8%6.0 pCi/L+42.7 points
Bayfield Countylowest in the state355.7%1.5 pCi/L−17.4 points
Washburn County, WIborders it4944.9%3.1 pCi/L+21.8 points
Pine County, MNborders it4839.6%2.5 pCi/L+16.5 points
Chisago County, MNborders it16634.9%2.9 pCi/L+11.8 points
Barron County, WIborders it19934.7%2.5 pCi/L+11.6 points
Polk County, WIborders it12233.6%2.8 pCi/L+10.5 points
Douglas County, WIborders it449.1%1.5 pCi/L−14.0 points
Where Burnett County's reported results fell, 2023, beside Wisconsin and the United States
ResultBurnett County testsBurnett County shareWisconsin shareU.S. shareAgainst Wisconsin
Under 2 pCi/L3057.7%41.4%41.4%+16.3 points
2 to 4 pCi/L1019.2%23.0%25.2%−3.8 points
4 pCi/L and above1223.1%35.7%33.4%−12.6 points
Burnett County ranked among the 69 Wisconsin counties with 30 or more tests, by share at or above 4 pCi/L, 2023
CountyRankTestsAt or above 4 pCi/LMedian
Ashland County51 of 694129.3%2.3 pCi/L
Columbia County52 of 6916328.8%2.0 pCi/L
Waushara County53 of 697125.4%1.9 pCi/L
Clark County54 of 697525.3%2.2 pCi/L
Lincoln County55 of 698123.5%2.1 pCi/L
Burnett County56 of 695223.1%1.6 pCi/L
Brown County57 of 6955123.0%1.4 pCi/L
Monroe County58 of 6921322.5%2.2 pCi/L
Vilas County59 of 6910621.7%2.1 pCi/L
Adams County60 of 694820.8%1.7 pCi/L
Milwaukee County61 of 692,60520.2%1.5 pCi/L
Burnett County radon tests by year, against Wisconsin's pooled share
YearTestsAt or above 4 pCi/LMedianHighestWisconsin, pooledChange from the row before
20235223.1%1.6 pCi/L10.4 pCi/L35.7%−7.5 points
20224930.6%2.4 pCi/L13.0 pCi/L42.9%+5.6 points
20213625.0%2.0 pCi/L11.9 pCi/L39.9%+16.3 points
2020238.7%1.9 pCi/L4.8 pCi/L27.0%−23.4 points
20192832.1%2.7 pCi/L15.0 pCi/L42.9%+8.0 points
20172924.1%2.8 pCi/L9.8 pCi/L44.8%−9.2 points
20163033.3%2.7 pCi/L16.3 pCi/L45.2%−1.5 points
20152334.8%3.3 pCi/L19.1 pCi/L51.6%−5.8 points
20143240.6%3.6 pCi/L14.4 pCi/L51.1%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Burnett County, Geology

The ground under Burnett County

Predicted

Most of the ground under Burnett County is one class on USGS's geologic map: 99.7% of its land is moderate radon potential, with 0.3% high. 99.2% of it lies in the area the map calls Superior Lobe, to which USGS gives a radon index of 10, in the moderate band (9 to 11).

USGS's geologic areas under Burnett County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Superior LobeGlacial deposits derived from sandstone and volcanic rocks.Moderate1099.2%
Superior Upland/Central Lowland-Western Lake SectionGlacial deposits derived primarily from volcanic rock.Moderate100.5%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Burnett County beside the ground around it

Wisconsin as a whole has more high-potential ground than Burnett County: 34.8% of its land, against 0.3% here. Of the 6 counties that border it, 3 have more high-potential ground, Chisago County, MN the most at 100%.

Share of land by USGS radon potential: Burnett County, the 6 counties bordering it and Wisconsin
AreaEPA zoneLow potentialModerate potentialHigh potential
Burnett CountyZone 2None99.7%0.3%
Pine County, MNZone 2None88.3%11.7%
Washburn CountyZone 2None100%None
Polk CountyZone 2None86.6%13.4%
Chisago County, MNZone 2NoneNone100%
Barron CountyZone 2None100%None
Douglas CountyZone 2None99.5%None
Wisconsin72 counties, pooled by land areaVaries1.4%63.5%34.8%

The map rates the ground, not the air in any home.

Local help

Burnett County, Local resources

Radon testing and mitigation in Burnett County

What Wisconsin's program says
Phone
1-888-569-7236
Email
DHSRadon@dhs.wisconsin.gov
Licensing of radon professionals
The State of Wisconsin does not require contractors performing radon measurement or mitigation work to be state licensed or nationally certified.

What it means

Burnett County, Questions

Questions about radon in Burnett County

Are radon levels high in Burnett County?

In 2023, 23.1% of the radon tests reported to CDC for Burnett County, Wisconsin were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.6 pCi/L. Of 69 Wisconsin counties with 30 or more tests for the same period, 55 reported a higher share; pooled, the state comes to 35.7%.

Which counties border Burnett County?

Burnett County borders 6 counties: Pine County, MN, Washburn County, WI, Polk County, WI, Chisago County, MN, Barron County, WI and Douglas County, WI.

Products

Burnett County, Products

Testing a home in Burnett County

In Burnett County, 23.1% of 52 tests reported to CDC in 2023 reached 4 pCi/L, against 35.7% pooled across Wisconsin. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Burnett County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Burnett County homes, compared

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Burnett County, Bordering counties

Counties bordering Burnett County

Calculated by Radon411

Burnett County, Cities and towns

Cities and towns in Burnett County

The Census Bureau estimates 17,223 residents in Burnett County for July 1, 2025, 643 more than in 2020 (+3.9%). That works out to 21 people per square mile of land. No town dominates: Grantsburg, the largest, has 1,374 residents, 8.0% of the total. Together its 3 incorporated places hold 17.5% of those residents; the other 82.5% live outside any of them. CDC's 52 reported tests for 2023 work out to 3.0 per 1,000 residents (2025 estimate), close to Wisconsin's 3.5.

From Grantsburg to Webster, CDC publishes no figure by town: each reads Burnett County's.

The cities and towns in Burnett County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Grantsburg1,374+2.8%8.0%
Siren920+11.0%5.3%
Webster719+3.6%4.2%

3 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).

Burnett County, Homes

Homes in Burnett County

Burnett County is a place of houses on their own lots: 87% of its 15,328 homes are detached single-family houses, against 66% across Wisconsin. Much of Burnett County is recent building: 26% of its homes have gone up since 2000 and the middle year built is 1983, against 1975 for Wisconsin. Owners live in 85% of the occupied homes (Wisconsin: 68%), so for most households a test and a fix are their own to order.

Homes in Burnett County, Wisconsin, 2019 to 2023
HomesBurnett CountyWisconsin
Housing units15,3282,750,750
Detached houses87%66%
In buildings of 5 or more2%17%
Mobile homes9%3%
Built before 196019%34%
Built since 200026%20%
Middle year built19831975
Owner-occupied85%68%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.