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Radon Levels in Taylor County, Wisconsin

EPA puts Taylor County in Zone 2, its middle radon zone, and 18.9% of its 37 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

    18.9%

    16.8 pts below WI

    Taylor
    18.9%
    Wisconsin
    35.7%

    37 tests, 2023

  • Median result

    2.1pCi/L

    Below action level

    Taylor
    2.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    37

    68th of 69 by tests

    Taylor
    37
    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

    63 of 69

    Lowest quarter

    Taylor
    18.9%
    Langlade
    65.8%

    By share, of 69 with 30+ tests

Read a result for Taylor County

Starts at Taylor County's median, 2.1 pCi/L

2.1pCi/L

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

EPA’s reading of 2.1 pCi/L

Between 2 and 4 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 between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Taylor County's median reported result, 2023.

Interpret this readingWhat a fix costs

The data

Taylor County, At a glance

Taylor County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Taylor 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 Taylor County, 2023

Share of reported tests at or above 4 pCi/L, by year, Taylor County
Share of reported tests at or above 4 pCi/L, by year, Taylor County
YearShare of reported tests at or above 4 pCi/L
201418.2%
201539.3%
201627.9%
201720.8%
201933.3%
202016.7%
202141.2%
202227.3%
202318.9%

2023: 18.9%. Across these years the share ran from 16.7% to 41.2%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 37 tests reported to CDC for Taylor 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

Taylor County, Compared

Taylor County radon figures, compared

Calculated by Radon411

Taylor County's 37 reported tests in 2023 had a middle value of 2.1 pCi/L and a maximum of 17.7 pCi/L, and 18.9% reached 4 pCi/L. Wisconsin as a whole (72 Wisconsin counties, pooled) comes to 35.7%: 16.8 points higher than here.

Among its state's counties it ranks 63rd 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, 17 tests (45.9%) came in under 2 pCi/L, against 41.4% statewide, and 13 tests (35.1%) fell between 2 and 4, against 23.0% statewide. The busiest year on file was 2019, with 69 tests reported; the quietest, 2022, had 22.

EPA's 1993 zone map puts Taylor 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 23.5% in Lincoln County to 51.9% in Marathon County. Over 7 years of annual figures the share held within 2 points, from 18.2% in 2014 to 18.9% in 2023; its peak was 41.2% in 2021.

Share of reported tests at or above 4 pCi/L by year, Taylor County against Wisconsin2014 to 2023, years with 30 or more tests: Taylor County 18.2% to 18.9%, the state's pooled share 35.7% in 2023.
Taylor CountyWisconsin, pooled
Share of reported tests at or above 4 pCi/L by year, Taylor County against Wisconsin: data table
YearTestsTaylor County, at or above 4 pCi/LWisconsin, pooled
20143318.2%51.1%
20164327.9%45.2%
20174820.8%44.8%
20196933.3%42.9%
20204816.7%27.0%
20213441.2%39.9%
20233718.9%35.7%
Taylor County against Wisconsin, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Taylor County
Taylor County3718.9%2.1 pCi/LThis county
Wisconsin, pooled72 counties, pooled20,87935.7%Not pooled+16.8 points
United States, pooled642 counties, pooled128,74033.4%Not pooled+14.5 points
Langlade Countyhighest in the state22565.8%6.0 pCi/L+46.9 points
Bayfield Countylowest in the state355.7%1.5 pCi/L−13.2 points
Marathon County, WIborders it34951.9%4.3 pCi/L+33.0 points
Rusk County, WIborders it5738.6%3.2 pCi/L+19.7 points
Price County, WIborders it6036.7%2.8 pCi/L+17.8 points
Chippewa County, WIborders it31135.7%2.5 pCi/L+16.8 points
Clark County, WIborders it7525.3%2.2 pCi/L+6.4 points
Lincoln County, WIborders it8123.5%2.1 pCi/L+4.6 points
Where Taylor County's reported results fell, 2023, beside Wisconsin and the United States
ResultTaylor County testsTaylor County shareWisconsin shareU.S. shareAgainst Wisconsin
Under 2 pCi/L1745.9%41.4%41.4%+4.5 points
2 to 4 pCi/L1335.1%23.0%25.2%+12.1 points
4 pCi/L and above718.9%35.7%33.4%−16.8 points
Taylor 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
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
Fond du Lac County62 of 6998419.6%1.4 pCi/L
Taylor County63 of 693718.9%2.1 pCi/L
Wood County64 of 6920818.3%1.4 pCi/L
Pepin County65 of 696515.4%1.2 pCi/L
Marquette County66 of 694015.0%1.3 pCi/L
Juneau County67 of 695010.0%1.1 pCi/L
Douglas County68 of 69449.1%1.5 pCi/L
Taylor County radon tests by year, against Wisconsin's pooled share
YearTestsAt or above 4 pCi/LMedianHighestWisconsin, pooledChange from the row before
20233718.9%2.1 pCi/L17.7 pCi/L35.7%−8.4 points
20222227.3%2.9 pCi/L12.0 pCi/L42.9%−13.9 points
20213441.2%2.8 pCi/L16.1 pCi/L39.9%+24.5 points
20204816.7%1.8 pCi/L9.9 pCi/L27.0%−16.6 points
20196933.3%2.5 pCi/L29.4 pCi/L42.9%+12.5 points
20174820.8%1.4 pCi/L13.9 pCi/L44.8%−7.1 points
20164327.9%2.6 pCi/L93.9 pCi/L45.2%−11.4 points
20152839.3%3.4 pCi/L21.0 pCi/L51.6%+21.1 points
20143318.2%1.3 pCi/L45.6 pCi/L51.1%First on file

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

Taylor County, Geology

The ground under Taylor County

Predicted

USGS's geologic map puts all of Taylor County's mapped land in one class: moderate radon potential. The map puts 67.6% of Taylor County in the area it calls Chippewa, Wisconsin Valley, and Langlade sublobes of the Superior Lobe and 32.4% in Central Plain/Northern Highland. USGS gives both a radon index of 10, in the moderate band (9 to 11).

USGS's geologic areas under Taylor County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Chippewa, Wisconsin Valley, and Langlade sublobes of the Superior LobeGranite, granite-derived glacial deposits, and mafic volcanic rocks.Moderate1067.6%
Central Plain/Northern HighlandPre-Late Wisconsinan glacial deposits derived from sandstone and carbonate rocks.Moderate1032.4%

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

Taylor County beside the ground around it

Across Wisconsin 34.8% of the land is rated high; none of Taylor County's is. Of the 6 counties that border it, 2 have more high-potential ground, Marathon County the most at 84.0%.

Share of land by USGS radon potential: Taylor County, the 6 counties bordering it and Wisconsin
AreaEPA zoneLow potentialModerate potentialHigh potential
Taylor CountyZone 2None100%None
Clark CountyZone 2None97.5%2.5%
Lincoln CountyZone 2None100%None
Rusk CountyZone 2None100%None
Price CountyZone 2None100%None
Chippewa CountyZone 2None100%None
Marathon CountyZone 1None16.0%84.0%
Wisconsin72 counties, pooled by land areaVaries1.4%63.5%34.8%

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

Local help

Taylor County, Local resources

Radon testing and mitigation in Taylor 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

Taylor County, Questions

Questions about radon in Taylor County

Are radon levels high in Taylor County?

In 2023, 18.9% of the radon tests reported to CDC for Taylor County, Wisconsin were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Of 69 Wisconsin counties with 30 or more tests for the same period, 62 reported a higher share; pooled, the state comes to 35.7%.

Which counties border Taylor County?

Taylor County borders 6 counties: Clark County, Lincoln County, Rusk County, Price County, Chippewa County and Marathon County.

Products

Taylor County, Products

Testing a home in Taylor County

In Taylor County, 18.9% of 37 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 Taylor County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Taylor County homes, compared

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Taylor County, Bordering counties

Counties bordering Taylor County

Calculated by Radon411

Taylor County, Cities and towns

Cities and towns in Taylor County

The Census Bureau estimates 20,118 residents in Taylor County for July 1, 2025, 176 more than in 2020 (+0.9%). That works out to 21 people per square mile of land. Its largest town, Medford, has 4,589 residents, 22.8% of the total. Together its 5 incorporated places hold 32.6% of those residents; the other 67.4% live outside any of them. Reported testing is thin here: 37 tests over 2023, or 1.8 for every 1,000 residents (2025 estimate), where Wisconsin as a whole comes to 3.5.

From Medford to Lublin, CDC publishes no figure by town: each reads Taylor County's.

The cities and towns in Taylor County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Medford4,589+5.4%22.8%
Rib Lake912−1.4%4.5%
Stetsonville556−1.4%2.8%
Gilman380+0.3%1.9%
Lublin113−2.6%0.6%

5 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).

Taylor County, Homes

Homes in Taylor County

Taylor County is a place of houses on their own lots: 78% of its 9,453 homes are detached single-family houses, against 66% across Wisconsin. Half of its homes were built before 1977, close to Wisconsin's 1975: 31% date from before 1960 and 21% from 2000 or later. Owners live in 79% of the occupied homes (Wisconsin: 68%), so for most households a test and a fix are their own to order.

Homes in Taylor County, Wisconsin, 2019 to 2023
HomesTaylor CountyWisconsin
Housing units9,4532,750,750
Detached houses78%66%
In buildings of 5 or more5%17%
Mobile homes8%3%
Built before 196031%34%
Built since 200021%20%
Middle year built19771975
Owner-occupied79%68%

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