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Radon Levels in Fulton County, Indiana

EPA puts Fulton County in Zone 1, its highest radon zone, and high results are common there: 46.4% of the 97 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

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  • Share at 4+ pCi/L

    46.4%

    7.5 pts above IN

    Fulton
    46.4%
    Indiana
    38.9%

    97 tests, 2008 to 2017

  • Median result

    3.3pCi/L

    Below action level

    Fulton
    3.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    97

    45th of 69 by tests

    Fulton
    97
    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

    26 of 69

    Middle half

    Fulton
    46.4%
    Miami
    63.3%

    By share, of 69 with 30+ tests

Read a result for Fulton County

Starts at Fulton County's median, 3.3 pCi/L

3.3pCi/L

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

EPA’s reading of 3.3 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. Fulton County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Fulton County, At a glance

Fulton County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Fulton 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 Fulton County, 2008 to 2017, laboratory

Reported results by concentration band, Fulton County, 2008 to 2017, laboratory
Under 2 pCi/L: 30%2 to 4 pCi/L: 24%4 pCi/L and above: 46%

Of 97 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Fulton County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L2929.9%
2 to 4 pCi/L2323.7%
4 pCi/L and above4546.4%
What these figures count

These are the 97 tests reported to CDC for Fulton 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

Fulton County, Compared

Fulton County radon figures, compared

Calculated by Radon411

In Fulton County, about 5 in 10 reported tests over the 2008 to 2017 laboratory totals (45 of 97) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 10.7 points higher. Across 92 Indiana counties pooled together, 38.9% of tests reached that level, so Fulton County runs 7.5 points above 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 34.1% (Cass County) to 63.3% (Miami County). By share, Fulton County is 26th of 69 Indiana counties with 30 or more tests for the same period.

Half the tests came in under 3.3 pCi/L and half over it; the single highest reached 41.4 pCi/L. Below the action level, 29 tests (29.9%) came in under 2 pCi/L, against 32.8% statewide, and 23 tests (23.7%) fell between 2 and 4, against 28.3% statewide.

Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 46.4% share point the same way here. USGS geology rates 100% of the county's land high radon potential.

CDC's ten-year totals for Fulton County went from 57 tests (2005 to 2014) to 97 (2008 to 2017), the share going from 50.9% to 46.4%.

Fulton County against Indiana, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Fulton County
Fulton County9746.4%3.3 pCi/LThis county
Indiana, pooled92 counties, pooled43,14838.9%Not pooled−7.5 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−10.7 points
Harrison Countyhighest in the state22162.4%5.5 pCi/L+16.0 points
Jasper Countylowest in the state7114.1%1.2 pCi/L−32.3 points
Miami County, INborders it3063.3%5.3 pCi/L+16.9 points
Wabash County, INborders it9159.3%5.8 pCi/L+12.9 points
Kosciusko County, INborders it1,24850.6%4.0 pCi/L+4.2 points
Marshall County, INborders it38339.7%3.2 pCi/L−6.7 points
Cass County, INborders it9134.1%2.6 pCi/L−12.3 points
Pulaski County, INborders it2231.8%2.3 pCi/L−14.6 points
Starke County, INborders it244.2%1.6 pCi/L−42.2 points
Where Fulton County's reported results fell, 2008 to 2017, laboratory, beside Indiana and the United States
ResultFulton County testsFulton County shareIndiana shareU.S. shareAgainst Indiana
Under 2 pCi/L2929.9%32.8%39.6%−2.9 points
2 to 4 pCi/L2323.7%28.3%24.7%−4.6 points
4 pCi/L and above4546.4%38.9%35.7%+7.5 points
Fulton 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
Bartholomew County21 of 691,70748.7%3.9 pCi/L
Adams County22 of 696648.5%3.8 pCi/L
Wells County23 of 6916147.8%3.6 pCi/L
Clark County24 of 6951247.7%3.6 pCi/L
Porter County25 of 691,13646.5%3.5 pCi/L
Fulton County26 of 699746.4%3.3 pCi/L
Elkhart County27 of 692,85646.4%3.7 pCi/L
Clinton County28 of 698545.9%3.5 pCi/L
Jefferson County29 of 697245.8%3.1 pCi/L
Morgan County30 of 6922644.2%3.5 pCi/L
Dubois County31 of 6913644.1%3.7 pCi/L
Fulton County ten-year laboratory totals, against Indiana's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestIndiana, pooledChange from the row before
2008 to 20179746.4%3.3 pCi/L41.4 pCi/L38.9%−3.6 points
2007 to 20167850.0%4.3 pCi/L44.6 pCi/L39.2%−2.2 points
2006 to 20156752.2%4.9 pCi/L44.6 pCi/L39.6%+1.3 points
2005 to 20145750.9%4.8 pCi/L44.6 pCi/L39.3%First on file

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

Fulton County, Geology

The ground under Fulton County

Predicted

USGS's geologic map puts all of Fulton County's mapped land in one class: high radon potential. 97.4% of it lies in the area the map calls Saginaw Lobe, to which USGS gives a radon index of 12, in the high band (12 to 17).

USGS's geologic areas under Fulton County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Saginaw LobeClayey and loamy glacial deposits.High1297.4%
Huron-Erie LobeCalcareous clayey and loamy glacial deposits derived from marine carbonate and clastic sedimentary rocks.High132.6%

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

Fulton County beside the ground around it

Fulton County has more high-potential ground than Indiana as a whole: 100% of its land against 56.6%. Of the 7 counties that border it, none has as large a share of high-potential ground; Kosciusko County comes nearest at 100%.

Share of land by USGS radon potential: Fulton County, the 7 counties bordering it and Indiana
AreaEPA zoneLow potentialModerate potentialHigh potential
Fulton CountyZone 1NoneNone100%
Cass CountyZone 1NoneNone100%
Marshall CountyZone 1None12.3%87.7%
Miami CountyZone 1NoneNone100%
Pulaski CountyZone 2None56.9%43.1%
Kosciusko CountyZone 1NoneNone100%
Starke CountyZone 2None98.5%1.5%
Wabash CountyZone 1NoneNone100%
Indiana92 counties, pooled by land areaVariesNone43.4%56.6%

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

Local help

Fulton County, Local resources

Radon testing and mitigation in Fulton 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

Fulton County, Questions

Questions about radon in Fulton County

Are radon levels high in Fulton County?

Over the 2008 to 2017 laboratory totals, 46.4% of the radon tests reported to CDC for Fulton County, Indiana were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.3 pCi/L. Of 69 Indiana counties with 30 or more tests for the same period, 25 reported a higher share; pooled, the state comes to 38.9%.

Which counties border Fulton County?

Fulton County borders 7 counties: Cass County, Marshall County, Miami County, Pulaski County, Kosciusko County, Starke County and Wabash County.

Products

Fulton County, Products

Testing a home in Fulton County

In Fulton County, 46.4% of 97 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 Fulton 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

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

Explore

Fulton County, Bordering counties

Counties bordering Fulton County

Calculated by Radon411

Fulton County, Cities and towns

Cities and towns in Fulton County

About 20,091 people live in Fulton County by the Census Bureau's estimate for July 1, 2025, 385 fewer than in 2020 (−1.9%). That works out to 55 people per square mile of land. Its largest town, Rochester, has 6,132 residents, 30.5% of the total. Together its 4 incorporated places hold 40.3% of those residents; the other 59.7% live outside any of them. CDC's 97 reported tests for 2008 to 2017 work out to 4.8 per 1,000 residents (2025 estimate), close to Indiana's 6.2.

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

The cities and towns in Fulton County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Rochester6,132−2.2%30.5%
Akron1,102−2.4%5.5%
Kewanna563−2.4%2.8%
Fulton291−2.3%1.4%

4 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).

Fulton County, Homes

Homes in Fulton County

Fulton County is a place of houses on their own lots: 78% of its 9,564 homes are detached single-family houses, against 73% across Indiana. Half of its homes were built before 1970, close to Indiana's 1976: 41% date from before 1960 and 14% from 2000 or later. Owners live in 78% of the occupied homes (Indiana: 70%), so for most households a test and a fix are their own to order.

Homes in Fulton County, Indiana, 2019 to 2023
HomesFulton CountyIndiana
Housing units9,5642,953,344
Detached houses78%73%
In buildings of 5 or more4%13%
Mobile homes12%4%
Built before 196041%32%
Built since 200014%21%
Middle year built19701976
Owner-occupied78%70%

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