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Radon Levels in Switzerland County, Indiana

EPA puts Switzerland County in Zone 2, its middle radon zone, and only 15 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Highest bordering

    45.8%

    Jefferson County

    Jefferson
    45.8%
    Ripley
    35.3%

    3 of 6 neighbours have 30+ tests, 2008 to 2017

  • Nearest county

    45.8%

    Jefferson County, 22 miles

    Jefferson
    45.8%
    Indiana
    38.9%

    Share at 4+ pCi/L, 72 tests, 2008 to 2017

  • Ground above low

    100.0%

    Level with Indiana

    Switzerland
    100.0%
    Indiana
    100.0%

    Share of land USGS rates moderate or high potential

  • Tests reported

    15

    Too few for a share

    Switzerland
    15
    Needed
    30

    2008 to 2017, laboratory

  • 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

Read a result for Switzerland County

Starts at EPA's action level

4.0pCi/L

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

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 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

Switzerland County, At a glance

Switzerland County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Switzerland 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 Switzerland County, 2008 to 2017, laboratory

CDC holds 15 reported tests for Switzerland County over the 2008 to 2017 laboratory totals, with a median of 1.5 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Switzerland County beside the counties around it is how this page reads it.

What these figures count

Only 15 tests were reported to CDC for Switzerland County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Switzerland County, Compared

Switzerland County radon figures, compared

Calculated by Radon411

CDC's largest figure for Switzerland County rests on 15 tests over the 2008 to 2017 laboratory totals, 5 of them at or above 4 pCi/L, so each test moves its share by 6.7 points and no rank or comparison is drawn from it. Results reached as high as 23.9 pCi/L, with a middle value of 1.5 pCi/L.

Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Jefferson County reported the largest share at or above 4 pCi/L, 45.8%, and Ripley County the smallest, 35.3%, with Boone County, KY at 42.9% between. Farther out, Dearborn County (22 miles away) at 30.1%, Jennings County (34 miles away) at 35.1% and Franklin County (41 miles away) at 28.0% have figures too. Pooled across 92 Indiana counties, 38.9% of reported tests reached that level; across every county in the country with a figure, 35.7%.

Statewide for the same period, Miami County reported the highest share (63.3%) and Jasper County the lowest (14.1%). EPA's 1993 map puts Switzerland County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Indiana, the United States and the counties around Switzerland County, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedian
Indiana, pooled92 counties, pooled43,14838.9%Not pooled
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled
Miami Countyhighest in the state3063.3%5.3 pCi/L
Jasper Countylowest in the state7114.1%1.2 pCi/L
Ohio County, INborders it2152.4%4.1 pCi/L
Jefferson County, INborders it7245.8%3.1 pCi/L
Boone County, KYborders it1,43442.9%3.5 pCi/L
Carroll County, KYborders it2638.5%3.5 pCi/L
Ripley County, INborders it6835.3%2.9 pCi/L
Gallatin County, KYborders it2425.0%2.5 pCi/L
The nearest Indiana counties to Switzerland County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Jefferson County22 mi7245.8%3.1 pCi/L
Dearborn County22 mi13630.1%2.6 pCi/L
Ripley County23 mi6835.3%2.9 pCi/L
Jennings County34 mi5735.1%2.8 pCi/L
Franklin County41 mi5028.0%2.1 pCi/L
Decatur County42 mi6333.3%2.8 pCi/L
Clark County44 mi51247.7%3.6 pCi/L
Bartholomew County53 mi1,70748.7%3.9 pCi/L
Switzerland County ten-year laboratory totals, against Indiana's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestIndiana, pooledChange from the row before
2008 to 20171533.3%1.5 pCi/L23.9 pCi/L38.9%−5.2 points
2007 to 20161338.5%1.8 pCi/L23.9 pCi/L39.2%−3.2 points
2006 to 20151241.7%2.1 pCi/L23.9 pCi/L39.6%+8.4 points
2005 to 2014933.3%1.5 pCi/L23.9 pCi/L39.3%First on file

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

Switzerland County, Geology

The ground under Switzerland County

Predicted

USGS's geologic map puts all of Switzerland County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Dearborn Upland, to which USGS gives a radon index of 10, in the moderate band (9 to 11).

USGS's geologic areas under Switzerland County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Dearborn UplandOrdovician through Devonian limestone, dolostone, and gray shale, and pre-Wisconsinan glacial deposits.Moderate1099.7%

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

Switzerland County beside the ground around it

Across Indiana 56.6% of the land is rated high; none of Switzerland County's is. Of the 6 counties that border it, 1 has more high-potential ground, Jefferson County the most at 23.8%.

Share of land by USGS radon potential: Switzerland County, the 6 counties bordering it and Indiana
AreaEPA zoneLow potentialModerate potentialHigh potential
Switzerland CountyZone 2None100%None
Gallatin County, KYZone 2None100%None
Carroll County, KYZone 2None100%None
Ohio CountyZone 2None100%None
Boone County, KYZone 2None100%None
Ripley CountyZone 2None100%None
Jefferson CountyZone 2None76.2%23.8%
Indiana92 counties, pooled by land areaVariesNone43.4%56.6%

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

Local help

Switzerland County, Local resources

Radon testing and mitigation in Switzerland County

What it means

Switzerland County, Questions

Questions about radon in Switzerland County

Are radon levels high in Switzerland County?

Over the 2008 to 2017 laboratory totals, 33.3% of the radon tests reported to CDC for Switzerland County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.5 pCi/L. Of the counties bordering it, 3 have a figure over the 2008 to 2017 laboratory totals: Jefferson County reported the largest share at or above 4 pCi/L, 45.8%, and Ripley County the smallest, 35.3%, with Boone County, KY at 42.9% between.

Which counties border Switzerland County?

Switzerland County borders 6 counties: Gallatin County, KY, Carroll County, KY, Ohio County, IN, Boone County, KY, Ripley County, IN and Jefferson County, IN.

Products

Switzerland County, Products

Testing a home in Switzerland County

No CDC figure names Switzerland County; the nearest county with one, Jefferson County (22 miles away), reported 45.8% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Switzerland County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Switzerland County homes, compared

Explore

Switzerland County, Bordering counties

Counties bordering Switzerland County

Calculated by Radon411

Switzerland County, Cities and towns

Cities and towns in Switzerland County

The Census Bureau estimates 10,037 residents in Switzerland County for July 1, 2025, 297 more than in 2020 (+3.0%). That works out to 45 people per square mile of land. No town dominates: Vevay, the largest, has 1,760 residents, 17.5% of the total. Together its 2 incorporated places hold 19.6% of those residents; the other 80.4% live outside any of them. Reported testing is thin here: 15 tests over 2008 to 2017, or 1.5 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 6.2.

From Vevay to Patriot, CDC publishes no figure by town: each reads Switzerland County's.

The cities and towns in Switzerland County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Vevay1,760+1.6%17.5%
Patriot209+5.0%2.1%

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).

Switzerland County, Homes

Homes in Switzerland County

Switzerland County is a place of houses on their own lots: 75% of its 4,399 homes are detached single-family houses, against 73% across Indiana. Much of Switzerland County is recent building: 24% of its homes have gone up since 2000 and the middle year built is 1988, against 1976 for Indiana. Owners live in 80% of the occupied homes (Indiana: 70%), so for most households a test and a fix are their own to order.

Homes in Switzerland County, Indiana, 2019 to 2023
HomesSwitzerland CountyIndiana
Housing units4,3992,953,344
Detached houses75%73%
In buildings of 5 or more5%13%
Mobile homes16%4%
Built before 196025%32%
Built since 200024%21%
Middle year built19881976
Owner-occupied80%70%

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