Skip to content
RADON411

Locations and reports

Radon Levels in Marshall County, Oklahoma

EPA puts Marshall County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

Predicted
Zone 3Lower predicted potential
Measured
No CDC figureCDC has published no radon test figures for Marshall County.
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

The data

Marshall County, At a glance

Marshall County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

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.

What EPA predicts hereScreening level, geology

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

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

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

No CDC test figures here

CDC has published no radon test figures for Marshall County. Only a test tells you the level in a home.

Local help

Marshall County, Local resources

Radon testing and mitigation in Marshall County

Who tests and fixes radon in Marshall County: listed businesses, Oklahoma's radon program and test kits.

Radon Action Brief

National Radon Action MonthPre-sale

Marshall County's radon brief, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get the Marshall County BriefSee a free sample

Area data, not a test of the building.

What it means

Marshall County, Questions

Questions about radon in Marshall County

Common questions

8 questions, answered from the figures above

Are radon levels high in Marshall County?

No CDC testing statistics are published here for Marshall County, Oklahoma yet. EPA places Marshall County in Zone 3, lower predicted potential, a predicted average indoor screening level less than 2 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.

Radon levels: what a result meansWhat is radon?Radon levels in Oklahoma

How do I get a radon test in Marshall 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 radon testing business listed on Radon411 has an address in Marshall County or names it as a service area yet. The Oklahoma radon program is the place to ask about certified testers and any test kit offer it runs.

Radon testing: how to test a homeRadon test kits comparedFree and low-cost kits by stateRadon Action Month checklistOklahoma radon program

Who does radon mitigation in Marshall County?

Radon411 has no radon business listed for Oklahoma yet. 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 Oklahoma requires one.

Radon mitigation: how it worksRadon mitigation costRadon mitigation systemsOklahoma radon program

What EPA radon zone is Marshall County in?

EPA places Marshall County, Oklahoma in Zone 3, which EPA describes as lower 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 Marshall 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 Marshall County?

Marshall County borders 5 counties, derived from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.

If you own, buy, sell or rent

What these figures mean for each reader, with the guide that covers it

The EPA zone on this page describes Marshall County as a whole. It is a prediction for an area, and it does not measure your building.

Marshall County in figures

The figures above, said in words

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

    • Predicted

      Predicted

      EPA places Marshall County in Zone 3, lower predicted potential, as it does 67 other counties of Oklahoma's 77.

      Of the 5 bordering counties, EPA places Bryan County, Carter County, Grayson County, TX, Johnston County and Love County in Zone 3.

  • Reported tests

    Measured

    CDC has no annual testing figure for Marshall County on file here.

  • Local record

    Oklahoma's radon program and its page are under Local resources.

    The county's largest incorporated places are Madill, Kingston and Oakland; the figures here cover them as part of the county.

Products

Marshall County, Products

Testing and mitigation products

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

Test kits and monitors42

See all products

As an Amazon Associate, Radon411 earns from qualifying purchases.

Best radon monitors for Marshall County homes, compared

Testing

5

Mitigation

3

Explore

Marshall County, Bordering counties

Counties bordering Marshall County

Calculated by Radon411
Why bordering counties matter

5 counties share a boundary with Marshall 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.

Marshall County, Cities and towns

Cities and towns in Marshall County

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

  • Madill
  • Kingston
  • Oakland

3 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files.

Marshall County, Next steps

What to do next

  1. LearnKnow what radon isWhat radon is, how it gets indoors, and why a county zone is not a reading for your home.Learn about radon
  2. TestTest the building you live inShort-term or long-term, where the device goes, and closed-house conditions.How to test
  3. FixBring a high level downHow a mitigation system works, and the retest that confirms it.How mitigation works
  4. Find a proHire a certified professionalMeasurement and mitigation professionals by state, with their certifications.Find a professional

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.