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Radon Levels in White County, Indiana

EPA puts White County in Zone 1, its highest radon zone, and 35.7% of its 42 reported radon tests (2008 to 2017, laboratory totals) 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

    35.7%

    3.2 pts below IN

    White
    35.7%
    Indiana
    38.9%

    42 tests, 2008 to 2017

  • Median result

    2.7pCi/L

    Below action level

    White
    2.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    42

    65th of 69 by tests

    White
    42
    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

    49 of 69

    Middle half

    White
    35.7%
    Miami
    63.3%

    By share, of 69 with 30+ tests

Read a result for White County

Starts at White County's median, 2.7 pCi/L

2.7pCi/L

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

EPA’s reading of 2.7 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. White County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

White County, At a glance

White County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of White 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 99% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for White County, 2008 to 2017, laboratory

Reported results by concentration band, White County, 2008 to 2017, laboratory
Under 2 pCi/L: 45%2 to 4 pCi/L: 19%4 pCi/L and above: 36%

Of 42 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, White County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L1945.2%
2 to 4 pCi/L819.0%
4 pCi/L and above1535.7%
What these figures count

These are the 42 tests reported to CDC for White 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

White County, Compared

White County radon figures, compared

Calculated by Radon411

In White County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (15 of 42) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 0.0 points lower. Across 92 Indiana counties pooled together, 38.9% of tests reached that level, so White County runs 3.2 points below its state.

Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 14.1% (Jasper County) to 61.8% (Benton County). By share, White County is 49th of 69 Indiana counties with 30 or more tests for the same period.

Half the tests came in under 2.7 pCi/L and half over it; the single highest reached 13.9 pCi/L. Below the action level, 19 tests (45.2%) came in under 2 pCi/L, against 32.8% statewide, and 8 tests (19.0%) fell between 2 and 4, against 28.3% statewide.

Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 35.7% share point the same way here. USGS geology rates 99% of the county's land high radon potential.

CDC's ten-year totals for White County went from 30 tests (2005 to 2014) to 42 (2008 to 2017), the share going from 50.0% to 35.7%.

White County against Indiana, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from White County
White County4235.7%2.7 pCi/LThis county
Indiana, pooled92 counties, pooled43,14838.9%Not pooled+3.2 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooledLevel
Miami Countyhighest in the state3063.3%5.3 pCi/L+27.6 points
Warrick Countylowest in the state56120.9%1.8 pCi/L−14.8 points
Benton County, INborders it3461.8%5.7 pCi/L+26.1 points
Carroll County, INborders it3860.5%5.8 pCi/L+24.8 points
Tippecanoe County, INborders it1,21836.8%2.7 pCi/L+1.1 points
Cass County, INborders it9134.1%2.6 pCi/L−1.6 points
Pulaski County, INborders it2231.8%2.3 pCi/L−3.9 points
Jasper County, INborders it7114.1%1.2 pCi/L−21.6 points
Where White County's reported results fell, 2008 to 2017, laboratory, beside Indiana and the United States
ResultWhite County testsWhite County shareIndiana shareU.S. shareAgainst Indiana
Under 2 pCi/L1945.2%32.8%39.6%+12.4 points
2 to 4 pCi/L819.0%28.3%24.7%−9.3 points
4 pCi/L and above1535.7%38.9%35.7%−3.2 points
White 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
Marshall County44 of 6938339.7%3.2 pCi/L
Johnson County45 of 6955639.4%2.9 pCi/L
Owen County46 of 6911039.1%2.8 pCi/L
Hamilton County47 of 693,47937.6%2.7 pCi/L
Tippecanoe County48 of 691,21836.8%2.7 pCi/L
White County49 of 694235.7%2.7 pCi/L
Lawrence County50 of 6926735.6%2.7 pCi/L
Posey County51 of 6921535.3%2.8 pCi/L
Ripley County52 of 696835.3%2.9 pCi/L
Jennings County53 of 695735.1%2.8 pCi/L
Daviess County54 of 695834.5%3.1 pCi/L
White County ten-year laboratory totals, against Indiana's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestIndiana, pooledChange from the row before
2008 to 20174235.7%2.7 pCi/L13.9 pCi/L38.9%+3.2 points
2007 to 20164032.5%2.8 pCi/L13.9 pCi/L39.2%+0.1 points
2006 to 20153732.4%2.8 pCi/L13.9 pCi/L39.6%−17.6 points
2005 to 20143050.0%3.9 pCi/L13.9 pCi/L39.3%First on file

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

White County, Geology

The ground under White County

Predicted

Most of the ground under White County is one class on USGS's geologic map: 99.3% of its land is high radon potential, with 0.7% moderate. 99.3% 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 White 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.High1399.3%
Kankakee Outwash and Lacustrine PlainMoraine deposits, outwash and dune sands.Moderate100.7%

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

White County beside the ground around it

White County has more high-potential ground than Indiana as a whole: 99.3% of its land against 56.6%. Of the 6 counties that border it, 4 have more high-potential ground, Benton County the most at 100%.

Share of land by USGS radon potential: White County, the 6 counties bordering it and Indiana
AreaEPA zoneLow potentialModerate potentialHigh potential
White CountyZone 1None0.7%99.3%
Carroll CountyZone 1NoneNone100%
Pulaski CountyZone 2None56.9%43.1%
Jasper CountyZone 2None46.0%54.0%
Cass CountyZone 1NoneNone100%
Benton CountyZone 1NoneNone100%
Tippecanoe CountyZone 1NoneNone100%
Indiana92 counties, pooled by land areaVariesNone43.4%56.6%

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

Local help

White County, Local resources

Radon testing and mitigation in White County

What Indiana's program says
Phone
1-800-272-9723
Licensing of radon professionals
According to the Indiana Radon Rule, 410 IAC 5.1, everyone who is serving Indiana by doing radon testing, analysis and mitigation (radon reduction) in residential structures must be certified by the Indiana State Department of Health.

What it means

White County, Questions

Questions about radon in White County

Are radon levels high in White County?

Over the 2008 to 2017 laboratory totals, 35.7% of the radon tests reported to CDC for White County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 69 Indiana counties with 30 or more tests for the same period, 48 reported a higher share; pooled, the state comes to 38.9%.

Which counties border White County?

White County borders 6 counties: Carroll County, Pulaski County, Jasper County, Cass County, Benton County and Tippecanoe County.

Products

White County, Products

Testing a home in White County

In White County, 35.7% of 42 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 White 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

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

Explore

White County, Bordering counties

Counties bordering White County

Calculated by Radon411

White County, Cities and towns

Cities and towns in White County

The Census Bureau estimates 25,164 residents in White County for July 1, 2025, 490 more than in 2020 (+2.0%). That works out to 50 people per square mile of land. Its largest town, Monticello, has 5,595 residents, 22.2% of the total. Together its 7 incorporated places hold 46.3% of those residents; the other 53.7% live outside any of them. Reported testing is thin here: 42 tests over 2008 to 2017, or 1.7 for every 1,000 residents (2025 estimate), where Indiana as a whole comes to 6.2.

From Monticello to Burnettsville, CDC publishes no figure by town: each reads White County's.

The cities and towns in White County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Monticello5,595+1.5%22.2%
Monon1,957+2.3%7.8%
Brookston1,659+1.7%6.6%
Wolcott963+1.4%3.8%
Reynolds538+1.5%2.1%
Chalmers530+1.5%2.1%
Burnettsville398+1.8%1.6%

7 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).

White County, Homes

Homes in White County

White County is a place of houses on their own lots: 78% of its 12,926 homes are detached single-family houses, against 73% across Indiana. Half of its homes were built before 1971, close to Indiana's 1976: 39% date from before 1960 and 12% from 2000 or later. Owners live in 79% of the occupied homes (Indiana: 70%), so for most households a test and a fix are their own to order.

Homes in White County, Indiana, 2019 to 2023
HomesWhite CountyIndiana
Housing units12,9262,953,344
Detached houses78%73%
In buildings of 5 or more5%13%
Mobile homes12%4%
Built before 196039%32%
Built since 200012%21%
Middle year built19711976
Owner-occupied79%70%

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