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Radon Levels in Camden County, Missouri

EPA puts Camden County in Zone 2, its middle radon zone, and only 8 radon tests from it are on file with CDC (2023). 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

    22.9%

    7.7 pts below MO

    Camden
    22.9%
    Missouri
    30.6%

    763 tests, 2008 to 2017

  • Median result

    2.2pCi/L

    Below action level

    Camden
    2.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    763

    12th of 72 by tests

    Camden
    763
    St. Louis
    17,747

    Reported to CDC before any fix, 2008 to 2017

  • 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 Missouri

    54 of 72

    Middle half

    Camden
    22.9%
    Atchison
    69.9%

    By share, of 72 with 30+ tests

Read a result for Camden County

Starts at Camden County's median, 2.2 pCi/L

2.2pCi/L

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

EPA’s reading of 2.2 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. Camden County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Camden County, At a glance

Camden County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Camden 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 Camden County, 2023

Share of reported tests at or above 4 pCi/L, by year, Camden County
Share of reported tests at or above 4 pCi/L, by year, Camden County
YearShare of reported tests at or above 4 pCi/L
201418.8%
201518.2%
201628.6%
201725.0%
201825.0%
201950.0%
202016.7%
202118.2%
202215.4%
202350.0%

2023: 50.0%. Across these years the share ran from 15.4% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 8 tests were reported to CDC for Camden County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Camden County, Compared

Camden County radon figures, compared

Calculated by Radon411

Camden County's 763 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.2 pCi/L and a maximum of 43.2 pCi/L, and 22.9% reached 4 pCi/L. Missouri as a whole (115 Missouri counties, pooled) comes to 30.6%: 7.7 points higher than here.

The newest figure, in 2023, counts only 8 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 763-test figure.

Among its state's counties it ranks 54th of 72 Missouri counties with 30 or more tests for the same period. Statewide for the same period, Atchison County reported the highest share (69.9%) and Vernon County the lowest (8.8%).

Below the action level, 342 tests (44.8%) came in under 2 pCi/L, against 41.2% statewide, and 246 tests (32.2%) fell between 2 and 4, against 28.1% statewide. The busiest year on file was 2014, with 16 tests reported; the quietest, 2019, had 2.

EPA's 1993 zone map puts Camden 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 16.9% in Miller County to 37.0% in Laclede County, with Morgan County, Pulaski County and Miller County below Camden County.

CDC also counts 41 tests taken after mitigation in Camden County for the same period: tests in homes where a fix was already in.

Camden County against Missouri, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Camden County
Camden County76322.9%2.2 pCi/LThis county
Missouri, pooled115 counties, pooled58,52530.6%Not pooled+7.7 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+12.8 points
Atchison Countyhighest in the state10369.9%5.6 pCi/L+47.0 points
Vernon Countylowest in the state348.8%0.9 pCi/L−14.1 points
Laclede County, MOborders it4637.0%2.3 pCi/L+14.1 points
Benton County, MOborders it4930.6%2.0 pCi/L+7.7 points
Morgan County, MOborders it12321.1%2.2 pCi/L−1.8 points
Pulaski County, MOborders it10718.7%1.3 pCi/L−4.2 points
Miller County, MOborders it15416.9%1.9 pCi/L−6.0 points
Dallas County, MOborders it2714.8%1.4 pCi/L−8.1 points
Hickory County, MOborders it90.0%2.0 pCi/L−22.9 points
Where Camden County's reported results fell, 2008 to 2017, laboratory, beside Missouri and the United States
ResultCamden County testsCamden County shareMissouri shareU.S. shareAgainst Missouri
Under 2 pCi/L34244.8%41.2%39.6%+3.6 points
2 to 4 pCi/L24632.2%28.1%24.7%+4.1 points
4 pCi/L and above17522.9%30.6%35.7%−7.7 points
Camden County ranked among the 72 Missouri counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Johnson County49 of 7226425.8%1.9 pCi/L
Moniteau County50 of 726825.0%2.2 pCi/L
Cole County51 of 7276824.6%2.1 pCi/L
DeKalb County52 of 723324.2%2.3 pCi/L
Monroe County53 of 723023.3%1.5 pCi/L
Camden County54 of 7276322.9%2.2 pCi/L
Livingston County55 of 724922.4%2.1 pCi/L
Boone County56 of 724,76721.7%1.9 pCi/L
Butler County57 of 723321.2%1.9 pCi/L
Morgan County58 of 7212321.1%2.2 pCi/L
Webster County59 of 7210320.4%1.6 pCi/L
Camden County radon tests by year, against Missouri's pooled share
YearTestsAt or above 4 pCi/LMedianHighestMissouri, pooledChange from the row before
2023850.0%3.7 pCi/L7.9 pCi/L35.7%+34.6 points
20221315.4%1.9 pCi/L10.0 pCi/L40.8%−2.8 points
20211118.2%2.6 pCi/L8.8 pCi/L31.8%+1.5 points
20201216.7%1.6 pCi/L23.8 pCi/L33.2%−33.3 points
2019250.0%3.0 pCi/L4.2 pCi/L33.5%+25.0 points
2018425.0%3.2 pCi/L5.0 pCi/L42.1%Level
2017825.0%2.8 pCi/L6.9 pCi/L37.0%−3.6 points
20161428.6%1.6 pCi/L11.2 pCi/L29.8%+10.4 points
20151118.2%2.0 pCi/L5.7 pCi/L27.6%−0.6 points
20141618.8%1.6 pCi/L5.0 pCi/L34.4%First on file

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

Camden County, Geology

The ground under Camden County

Predicted

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

USGS's geologic areas under Camden County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Salem PlateauOrdovician dolomite, sandstone, limestone, and shale.Moderate11100%

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

Camden County beside the ground around it

Across Missouri 8.2% of the land is rated high; none of Camden County's is. Of the 7 counties that border it, none has as large a share of moderate-potential ground; Dallas County comes nearest at 100%.

Share of land by USGS radon potential: Camden County, the 7 counties bordering it and Missouri
AreaEPA zoneLow potentialModerate potentialHigh potential
Camden CountyZone 2None100%None
Miller CountyZone 2None100%None
Hickory CountyZone 2None100%None
Laclede CountyZone 2None100%None
Morgan CountyZone 2None100%None
Dallas CountyZone 2None100%None
Benton CountyZone 2None100%None
Pulaski CountyZone 2None100%None
Missouri115 counties, pooled by land areaVaries5.8%86.0%8.2%

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

Local help

Camden County, Local resources

Radon testing and mitigation in Camden County

What Missouri's program says
Phone
573-751-6102
Email
radon@health.mo.gov

What it means

Camden County, Questions

Questions about radon in Camden County

Are radon levels high in Camden County?

In 2023, 50.0% of the radon tests reported to CDC for Camden County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.7 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 53 reported a higher share; pooled, the state comes to 30.6%.

Which counties border Camden County?

Camden County borders 7 counties: Miller County, Hickory County, Laclede County, Morgan County, Dallas County, Benton County and Pulaski County.

Products

Camden County, Products

Testing a home in Camden County

In Camden County, 22.9% of 763 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.6% pooled across Missouri. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Camden County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Camden County homes, compared

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Camden County, Bordering counties

Counties bordering Camden County

Calculated by Radon411

Camden County, Cities and towns

Cities and towns in Camden County

The Census Bureau estimates 44,047 residents in Camden County for July 1, 2025, 1,243 more than in 2020 (+2.9%). That works out to 67 people per square mile of land. Osage Beach, the largest place on its list (5,079 residents in all), extends beyond Camden County, so no share of the total is worked out for it. Testing is reported here more often than across the state: CDC's 763 reported tests for 2008 to 2017 come to 17.3 for every 1,000 residents (2025 estimate), against 9.3 for Missouri.

From Osage Beach to Friedenswald, CDC publishes no figure by town: each reads Camden County's.

The cities and towns in Camden County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Osage Beachextends beyond Camden County5,079+8.5%Counted whole
Camdenton4,050+1.8%9.2%
Village of Four Seasons2,473+3.8%5.6%
Lake Ozarkextends beyond Camden County2,247+8.1%Counted whole
Richlandextends beyond Camden County1,737+0.1%Counted whole
Laurieextends beyond Camden County1,087+15.9%Counted whole
Sunrise Beachextends beyond Camden County533+26.3%Counted whole
Linn Creek223+1.4%0.5%
Stoutlandextends beyond Camden County207+1.5%Counted whole
Friedenswald3LevelUnder 0.1%

10 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). A place that extends beyond Camden County is counted whole, so it has no share.

Camden County, Homes

Homes in Camden County

Of Camden County's 39,839 homes, 66% are detached houses, against 70% across Missouri; 23% are in buildings of five or more homes. Much of Camden County is recent building: 20% of its homes have gone up since 2000 and the middle year built is 1986, against 1978 for Missouri. Owners live in 83% of the occupied homes (Missouri: 68%), so for most households a test and a fix are their own to order.

Homes in Camden County, Missouri, 2019 to 2023
HomesCamden CountyMissouri
Housing units39,8392,809,501
Detached houses66%70%
In buildings of 5 or more23%13%
Mobile homes6%5%
Built before 19605%28%
Built since 200020%21%
Middle year built19861978
Owner-occupied83%68%

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