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Radon Levels in Morgan County, Missouri

Zone 2Moderate predicted potential618 square miles · 6 bordering counties

What this means for you

  • Your area: EPA rates Morgan County Zone 2, the middle of its three radon zones. That is a prediction for the whole county, and homes with elevated levels occur in all three zones.
  • Local tests: Of 1 buildings with radon tests reported to CDC for Morgan County (2023), 100.0% were at or above 4 pCi/L, EPA's action level.
  • Your home: The only way to know your home’s level is to test it.

pCi/L (picocuries per liter) is the unit radon is measured in. EPA recommends fixing a home at 4 pCi/L or above, its action level.

In 2023, 100.0% of the radon tests reported to CDC for Morgan County, Missouri came back at or above the EPA action level of 4 pCi/L, and the median result was 4.9 pCi/L. EPA's Map of Radon Zones places the county in Zone 2, moderate predicted potential. Radon levels vary from home to home, so only a test measures the level in yours.

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

EPA predicts an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³) across the county as a whole.

This is a county-level geologic prediction. It is not a measurement of any address, and houses with elevated radon are found in all three zones.

USGS geologic potential: Moderate across 100% of the county's land area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Morgan County, 2023

Buildings tested
1
At or above 4 pCi/L
100.0%
Median result
4.9 pCi/L

Distribution of tested buildings, not this house. People testing before a sale, or because they suspect a problem, are over-represented in any reported testing data.

Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

Morgan County, In figures

Morgan County in figures

What the published data says about Morgan County, in words. A zone and a share of tests describe an area, never the level in any one home.

    • Predicted

      Predicted

      EPA places Morgan County in Zone 2, moderate predicted potential, as it does 96 other counties of Missouri's 115.

      Of the 6 bordering counties, EPA places Benton County, Camden County, Cooper County, Miller County, Moniteau County and Pettis County in Zone 2.

  • Reported tests

    Measured

    CDC has annual figures for Morgan County for 9 years, 2014 to 2023. In 2023, 100.0% of reported tests were at or above 4 pCi/L.

    Across those years the share ranged from 0.0% (2020) to 100.0% (2023). Few tests in a year can move it a long way.

  • Local record

    Missouri's radon program is the Missouri Radon Program, run by Missouri Department of Health and Senior Services; its contacts are under Local resources.

    The county's largest incorporated places are Versailles, Laurie and Stover; the figures here cover them as part of the county.

Morgan County, Reported testing

Reported testing over time

Measured
Reported radon test results by year, Morgan County, pCi/LLogarithmic scale: each step up the axis multiplies the level, so the median and the single highest result can share one chart. The darker gridline is EPA's action level, 4 pCi/L.
Median reported resultHighest reported result

No figures are published for 2017. The axis keeps the space for the missing year and the line is not drawn across it.

Reported radon test results by year, Morgan County, pCi/L: data table
YearMedian reported resultHighest reported resultShare of tests at or above 4 pCi/L
20143.0 pCi/L9.4 pCi/L33.3%
20151.1 pCi/L1.6 pCi/L0.0%
20163.4 pCi/L9.2 pCi/L40.0%
20180.9 pCi/L0.9 pCi/L0.0%
20193.6 pCi/L3.6 pCi/L0.0%
20202.3 pCi/L2.3 pCi/L0.0%
20216.7 pCi/L19.9 pCi/L66.7%
20223.5 pCi/L5.8 pCi/L50.0%
20234.9 pCi/L4.9 pCi/L100.0%

What these figures count

Every percentage here is a share of radon tests reported to CDC for Morgan County in 2023. It is not a share of homes in Morgan County, and it is not a random sample: it counts only the tests people chose to run and that were reported.

The shares and the median are calculated from pre-mitigation tests. CDC also reports the number of buildings tested (1), a different count, so the two totals are not interchangeable.

Morgan County, Comparison

How Morgan County compares

Measured

Morgan County's own published CDC figures beside those of the counties that border it, for the same period.

Share of reported tests at or above 4 pCi/L

Measured

2023, highest first. Each county’s own published CDC figure.

  1. Morgan CountyThis pageTest count not published100.0%
  2. Moniteau CountyMOTest count not published75.0%
  3. Camden CountyMO8 tests50.0%
  4. Cooper CountyMOTest count not published33.3%

Published for 2023 without this measure: Pettis County, MO; Miller County, MO.

Median reported result

Measured

2023, highest first. Each county’s own published CDC figure.

  1. Moniteau CountyMOTest count not published6.8 pCi/L
  2. Morgan CountyThis pageTest count not published4.9 pCi/L
  3. Camden CountyMO8 tests3.7 pCi/L
  4. Cooper CountyMOTest count not published3.6 pCi/L
  5. Pettis CountyMOTest count not published2.4 pCi/L
  6. Miller CountyMOTest count not published0.1 pCi/L

Each figure is that county’s own published CDC figure for 2023, counting radon tests reported to CDC, not homes. Morgan County is this page. Nothing is averaged or combined across counties. The test count beside each county is CDC’s published number of pre-mitigation tests behind its figures. Figures from few tests can swing widely from year to year. No published CDC figure for 2023: Benton County, MO. Every Missouri county’s own figure is in the Missouri county table.

CDC publishes this figure only for counties here, so there is no state or national number to compare Morgan County, Missouri with.

Morgan County, Bordering counties

Counties bordering Morgan County

Calculated by Radon411

6 counties share a boundary with Morgan County, computed from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county’s report can be worth reading alongside this one.

Morgan County, Local resources

Local resources in Missouri

Who to ask in Missouri: the state's radon program, test kits and professionals.

Missouri Radon Program

Missouri Department of Health and Senior Services

Missouri’s radon program answers questions about testing, mitigation and the rules where you live.

Phone
573-751-6102
Email
radon@health.mo.gov
Visit the program's page(opens in a new tab)

Test kits

The program says: Free radon test kits are available for Missouri residents (limit one per household).

Radon professionals

6 professionals are listed in Missouri.

Professionals in Missouri

Morgan County, Cities and towns

Cities and towns in Morgan County

The radon figures on this page are for Morgan County as a whole. They do not differ by city or town.

  • Versailles
  • Laurie (part)
  • Stover
  • Sunrise Beach (part)
  • Barnett
  • Syracuse
  • Gravois Mills

7 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county.

Morgan County, Questions

Questions about radon in Morgan County

Common questions8 questions, answered from the figures above

Are radon levels high in Morgan County?

In 2023, 100.0% of the radon tests reported to CDC for Morgan County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.9 pCi/L. That is a share of reported tests, not of homes. EPA places Morgan County in Zone 2, moderate predicted potential, a predicted average indoor screening level 2 to 4 pCi/L. Homes with elevated levels occur in all three zones, so the figures describe the area, not your house. Testing is the only way to know the radon level in a specific building.

What a radon level meansRadon in Missouri

How do I get a radon test in Morgan County?

EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. No certified tester listed on Radon411 names Morgan County as a service area yet. The Missouri radon program is the place to ask about certified testers and any test kit offer it runs.

How to test a homeTest kits comparedFree and low-cost kits by stateMissouri radon program

Who does radon mitigation in Morgan County?

No listed mitigator names Morgan County as a service area yet; the Missouri directory lists 6 companies. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional. Your state radon program is the place to check whether Missouri requires one.

How radon mitigation worksWhat mitigation costsMitigators in Missouri

What EPA radon zone is Morgan County in?

EPA places Morgan County, Missouri in Zone 2, which EPA describes as moderate predicted potential for the area. A zone is a prediction for the whole county and never determines whether a particular home should be tested. EPA recommends testing every home regardless of zone.

Should I test my home in Morgan County?

Yes. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. How to test a home.

When is the best time of year to test?

EPA says short-term tests stay in the home from 2 to 90 days and that all radon tests should run a minimum of 48 hours; long-term tests stay more than 90 days. EPA's guides do not name a best season: they say radon levels tend to vary from day to day and season to season, so a long-term test is more likely than a short-term test to tell you the year-round average.

What does it cost to test?

EPA's Citizen's Guide calls testing easy and inexpensive, and EPA's Home Buyer's and Seller's Guide says passive short-term and long-term devices are generally inexpensive, while active devices may cost more. No national average price is published for this, so Radon411 does not give one. What testing costs.

Which counties border Morgan County?

Morgan County borders 6 counties, derived from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.

What these figures mean if you own, buy, sell or rent

The reported-test figures on this page describe Morgan County, Missouri in 2023. They describe tests other people carried out in other buildings, and none of them measures yours.

  • If you own your home

    Test the lowest lived-in level; a short-term kit screens in days, a long-term kit reflects the year.

    How to test a home
  • If you are buying

    Ask for past results and any system's post-mitigation test, and test during the sale.

    Buying a house: radon guide
  • If you are selling

    Testing before you list puts the timing in your hands; disclosure rules differ by state.

    Selling a house: radon guide
  • If you rent, or rent out a home

    A tenant can test; a fix is the owner's to make, and duties differ by state.

    Radon in rental homes

How long a test has to run, under what conditions, and what EPA says a result means: the testing standard, in full.

Morgan County, Products

Testing and mitigation products

Whatever the figures for Morgan County show, only a test tells you about one home.

Morgan County / Next steps

What to do next

Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.