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Radon Levels in Wabash County, Indiana

EPA puts Wabash County in Zone 1, its highest radon zone, and high results are common there: 59.3% of the 91 radon tests reported to CDC (2008 to 2017, laboratory totals) came back 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

    59.3%

    20.4 pts above IN

    Wabash
    59.3%
    Indiana
    38.9%

    91 tests, 2008 to 2017

  • Median result

    5.8pCi/L

    Action level reached

    Wabash
    5.8 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    91

    47th of 69 by tests

    Wabash
    91
    St. Joseph
    7,346

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in Indiana

    5 of 69

    Top quarter

    Wabash
    59.3%
    Miami
    63.3%

    By share, of 69 with 30+ tests

Read a result for Wabash County

Starts at Wabash County's median, 5.8 pCi/L

5.8pCi/L

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

EPA’s reading of 5.8 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. Wabash County's median reported result, 2008 to 2017.

The data

Wabash County, At a glance

Wabash County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Wabash County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

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 Wabash County, 2008 to 2017, laboratory

Reported results by concentration band, Wabash County, 2008 to 2017, laboratory
Under 2 pCi/L: 14%2 to 4 pCi/L: 27%4 pCi/L and above: 59%

Of 91 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Wabash County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L1314.3%
2 to 4 pCi/L2426.4%
4 pCi/L and above5459.3%
What these figures count

These are the 91 tests reported to CDC for Wabash County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Wabash County, Compared

Wabash County radon figures, compared

Calculated by Radon411

More than half: 59.3% of the 91 radon tests reported to CDC for Wabash County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 5th of 69 Indiana counties with 30 or more tests for the same period. That is 20.4 points above the 38.9% pooled from 92 Indiana counties.

The median result, 5.8 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 42.5 pCi/L. The rest split 14.3% under 2 pCi/L and 26.4% from 2 to 4 (Indiana: 32.8% and 28.3%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 59.3% share point the same way here.

1 of its 6 bordering counties with figures ran higher, led by Miami County at 63.3%; Huntington County reported 43.8%. Statewide for the same period, Miami County reported the highest share (63.3%) and Jasper County the lowest (14.1%).

CDC's ten-year totals for Wabash County went from 62 tests (2005 to 2014) to 91 (2008 to 2017), the share going from 50.0% to 59.3%.

Nationally, every county with a figure for the same period pools to 35.7%; Wabash County sits 23.6 points above it. CDC also counts 13 tests taken after mitigation in Wabash County for the same period: tests in homes where a fix was already in.

Wabash County against Indiana, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Wabash County
Wabash County9159.3%5.8 pCi/LThis county
Indiana, pooled92 counties, pooled43,14838.9%Not pooled−20.4 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−23.6 points
Harrison Countyhighest in the state22162.4%5.5 pCi/L+3.1 points
Jasper Countylowest in the state7114.1%1.2 pCi/L−45.2 points
Miami County, INborders it3063.3%5.3 pCi/L+4.0 points
Grant County, INborders it7958.2%4.6 pCi/L−1.1 points
Whitley County, INborders it18451.6%4.0 pCi/L−7.7 points
Kosciusko County, INborders it1,24850.6%4.0 pCi/L−8.7 points
Fulton County, INborders it9746.4%3.3 pCi/L−12.9 points
Huntington County, INborders it16943.8%3.5 pCi/L−15.5 points
Where Wabash County's reported results fell, 2008 to 2017, laboratory, beside Indiana and the United States
ResultWabash County testsWabash County shareIndiana shareU.S. shareAgainst Indiana
Under 2 pCi/L1314.3%32.8%39.6%−18.5 points
2 to 4 pCi/L2426.4%28.3%24.7%−1.9 points
4 pCi/L and above5459.3%38.9%35.7%+20.4 points
Wabash County ranked among the 69 Indiana counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Miami County1 of 693063.3%5.3 pCi/L
Harrison County2 of 6922162.4%5.5 pCi/L
Benton County3 of 693461.8%5.7 pCi/L
Carroll County4 of 693860.5%5.8 pCi/L
Wabash County5 of 699159.3%5.8 pCi/L
Grant County6 of 697958.2%4.6 pCi/L
LaPorte County7 of 6979258.2%5.0 pCi/L
DeKalb County8 of 6924256.6%4.4 pCi/L
Wayne County9 of 6914056.4%4.5 pCi/L
Steuben County10 of 6914055.7%4.5 pCi/L
Delaware County11 of 6918755.1%4.2 pCi/L
Wabash County ten-year laboratory totals, against Indiana's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestIndiana, pooledChange from the row before
2008 to 20179159.3%5.8 pCi/L42.5 pCi/L38.9%−2.0 points
2007 to 20168061.3%6.0 pCi/L42.5 pCi/L39.2%+5.7 points
2006 to 20157255.6%5.2 pCi/L42.5 pCi/L39.6%+5.6 points
2005 to 20146250.0%4.1 pCi/L28.6 pCi/L39.3%First on file

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

Wabash County, Geology

The ground under Wabash County

Predicted

USGS's geologic map puts all of Wabash County's mapped land in one class: high radon potential. All of it lies in the area the map calls Huron-Erie Lobe, to which USGS gives a radon index of 13, in the high band (12 to 17).

USGS's geologic areas under Wabash County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Huron-Erie LobeCalcareous clayey and loamy glacial deposits derived from marine carbonate and clastic sedimentary rocks.High13100%

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

Wabash County beside the ground around it

Wabash County has more high-potential ground than Indiana as a whole: 100% of its land against 56.6%. Of the 6 counties that border it, none has as large a share of high-potential ground; Fulton County comes nearest at 100%.

Share of land by USGS radon potential: Wabash County, the 6 counties bordering it and Indiana
AreaEPA zoneLow potentialModerate potentialHigh potential
Wabash CountyZone 1NoneNone100%
Miami CountyZone 1NoneNone100%
Huntington CountyZone 1NoneNone100%
Grant CountyZone 1NoneNone100%
Whitley CountyZone 1NoneNone100%
Fulton CountyZone 1NoneNone100%
Kosciusko CountyZone 1NoneNone100%
Indiana92 counties, pooled by land areaVariesNone43.4%56.6%

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

Local help

Wabash County, Local resources

Radon testing and mitigation in Wabash County

What it means

Wabash County, Questions

Questions about radon in Wabash County

Are radon levels high in Wabash County?

Over the 2008 to 2017 laboratory totals, 59.3% of the radon tests reported to CDC for Wabash County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.8 pCi/L. Of 69 Indiana counties with 30 or more tests for the same period, 4 reported a higher share; pooled, the state comes to 38.9%.

Which counties border Wabash County?

Wabash County borders 6 counties: Miami County, Huntington County, Grant County, Whitley County, Fulton County and Kosciusko County.

Products

Wabash County, Products

Testing a home in Wabash County

In Wabash County, 59.3% of 91 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 38.9% pooled across Indiana. In Zone 1 the year-round level in Wabash 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

Wabash County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Wabash County

Explore

Wabash County, Bordering counties

Counties bordering Wabash County

Calculated by Radon411

Wabash County, Cities and towns

Cities and towns in Wabash County

About 30,713 people live in Wabash County by the Census Bureau's estimate for July 1, 2025, 219 fewer than in 2020 (−0.7%). That works out to 74 people per square mile of land. Its largest town, Wabash, has 10,190 residents, 33.2% of the total. Together its 5 incorporated places hold 55.4% of those residents; the other 44.6% live outside any of them. Reported testing is thin here: 91 tests over 2008 to 2017, or 3.0 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 6.2.

From Wabash to Lagro, CDC publishes no figure by town: each reads Wabash County's.

The cities and towns in Wabash County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Wabash10,190−2.2%33.2%
North Manchester5,230−0.8%17.0%
La Fontaine819+1.5%2.7%
Roann437Level1.4%
Lagro350+0.9%1.1%

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).

Wabash County, Homes

Homes in Wabash County

Wabash County is a place of houses on their own lots: 83% of its 14,053 homes are detached single-family houses, against 73% across Indiana. The homes are older than Indiana's as a whole: half were built before 1959 (1976 for Indiana), and 51% date from before 1960. 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 Wabash County, Indiana, 2019 to 2023
HomesWabash CountyIndiana
Housing units14,0532,953,344
Detached houses83%73%
In buildings of 5 or more5%13%
Mobile homes5%4%
Built before 196051%32%
Built since 200010%21%
Middle year built19591976
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.