Locations and reports
Radon Levels in Louisiana
What this means for you
- Your area: None of Louisiana's 64 classified counties is in EPA Zone 1, the highest of its three radon zones. Zones are predictions for whole counties, and homes with elevated levels occur in all three zones.
- Local tests: CDC publishes Louisiana's radon test results by county. Open your county below to see its figures.
- 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.
For Louisiana, EPA's Map of Radon Zones places 0 of its 64 classified counties in Zone 1, highest predicted potential, a prediction for each county as a whole. Radon levels vary from home to home, so only a test measures the level in yours.
Predicted: EPA radon zone
64 of 64 counties classified
EPA classifies counties, not states. Of the 64 counties in Louisiana with a zone, 64 are in Zone 3.
- Zone 3: Lower predicted potentialless than 2 pCi/L64 of 64 counties · 100.0%
An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.
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.
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
CDC publishes Louisiana's radon test figures by county: 54 of its 64 counties have one. Each county's share is in the county list.
Louisiana, In figures
Louisiana in figures
What the published data says about Louisiana, in words. A zone and a share of tests describe an area, never the level in any one home.
Predicted
PredictedEPA places 64 of Louisiana's 64 counties in Zone 3.
No Louisiana county is in Zone 1.
Compared
Calculated by Radon4110% of Louisiana's counties with a zone on file are in Zone 1, a smaller share than across all U.S. counties (34%). It is a share of counties, not of land, people or homes.
Reported tests
MeasuredCDC has no statewide testing figure for Louisiana on file here.
54 of the 64 counties have a published county figure; the most tests in each one's latest year were reported for Livingston Parish (11 in 2020), St. Tammany Parish (9 in 2021) and Caddo Parish (6 in 2022).
Louisiana's radon program and its page are under Local resources.
Louisiana, Counties
Louisiana counties by EPA zone
PredictedAll 64 counties, by the zone EPA predicts for each. Every county has its own report.
Zone 3: lower predicted potential64
- Acadia Parish0.0% of reported tests at or above 4 pCi/L, 2018
- Allen ParishReported testing not yet available
- Ascension Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Assumption Parish0.0% of reported tests at or above 4 pCi/L, 2022
- Avoyelles Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Beauregard Parish0.0% of reported tests at or above 4 pCi/L, 2019
- Bienville Parish0.0% of reported tests at or above 4 pCi/L, 2016
- Bossier Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Caddo Parish1.9% of reported tests at or above 4 pCi/L, 2022
- Calcasieu Parish0.0% of reported tests at or above 4 pCi/L, 2022
- Caldwell Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Cameron Parish0.0% of reported tests at or above 4 pCi/L, 2017
- Catahoula Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Claiborne ParishReported testing not yet available
- Concordia Parish0.0% of reported tests at or above 4 pCi/L, 2015
- De Soto Parish0.0% of reported tests at or above 4 pCi/L, 2019
- East Baton Rouge Parish0.0% of reported tests at or above 4 pCi/L, 2022
- East Carroll ParishReported testing not yet available
- East Feliciana Parish0.0% of reported tests at or above 4 pCi/L, 2014
- Evangeline Parish0.0% of reported tests at or above 4 pCi/L, 2017
- Franklin Parish100.0% of reported tests at or above 4 pCi/L, 2017
- Grant Parish0.0% of reported tests at or above 4 pCi/L, 2015
- Iberia Parish0.0% of reported tests at or above 4 pCi/L, 2017
- Iberville Parish0.0% of reported tests at or above 4 pCi/L, 2019
- Jackson ParishReported testing not yet available
- Jefferson Davis Parish100.0% of reported tests at or above 4 pCi/L, 2018
- Jefferson Parish0.0% of reported tests at or above 4 pCi/L, 2022
- Lafayette Parish0.0% of reported tests at or above 4 pCi/L, 2022
- Lafourche Parish0.0% of reported tests at or above 4 pCi/L, 2020
- LaSalle ParishReported testing not yet available
- Lincoln Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Livingston Parish0.0% of reported tests at or above 4 pCi/L, 2020
- Madison ParishReported testing not yet available
- Morehouse Parish0.0% of reported tests at or above 4 pCi/L, 2017
- Natchitoches Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Orleans Parish0.0% of reported tests at or above 4 pCi/L, 2022
- Ouachita Parish0.0% of reported tests at or above 4 pCi/L, 2022
- Plaquemines Parish0.0% of reported tests at or above 4 pCi/L, 2020
- Pointe Coupee ParishReported testing not yet available
- Rapides Parish0.0% of reported tests at or above 4 pCi/L, 2022
- Red River Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Richland Parish0.0% of reported tests at or above 4 pCi/L, 2017
- Sabine Parish0.0% of reported tests at or above 4 pCi/L, 2017
- St. Bernard Parish0.0% of reported tests at or above 4 pCi/L, 2018
- St. Charles Parish0.0% of reported tests at or above 4 pCi/L, 2021
- St. Helena ParishReported testing not yet available
- St. James Parish0.0% of reported tests at or above 4 pCi/L, 2016
- St. John the Baptist Parish0.0% of reported tests at or above 4 pCi/L, 2019
- St. Landry Parish100.0% of reported tests at or above 4 pCi/L, 2019
- St. Martin Parish0.0% of reported tests at or above 4 pCi/L, 2017
- St. Mary Parish0.0% of reported tests at or above 4 pCi/L, 2018
- St. Tammany Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Tangipahoa Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Tensas ParishReported testing not yet available
- Terrebonne Parish0.0% of reported tests at or above 4 pCi/L, 2020
- Union Parish0.0% of reported tests at or above 4 pCi/L, 2022
- Vermilion Parish0.0% of reported tests at or above 4 pCi/L, 2020
- Vernon Parish0.0% of reported tests at or above 4 pCi/L, 2021
- Washington Parish0.0% of reported tests at or above 4 pCi/L, 2017
- Webster Parish0.0% of reported tests at or above 4 pCi/L, 2022
- West Baton Rouge Parish0.0% of reported tests at or above 4 pCi/L, 2022
- West Carroll Parish0.0% of reported tests at or above 4 pCi/L, 2014
- West Feliciana ParishReported testing not yet available
- Winn Parish0.0% of reported tests at or above 4 pCi/L, 2020
Louisiana, Local resources
Local resources in Louisiana
Who to ask in Louisiana: the state's radon program, test kits and professionals.
Louisiana's radon program
Louisiana Department of Environmental Quality
Louisiana’s radon program answers questions about testing, mitigation and the rules where you live.
Visit the program's page(opens in a new tab)Test kits
Ask the program whether it has free or discounted kits, or compare kits you can buy.
Radon professionals
1 professional is listed in Louisiana.
Professionals in LouisianaLouisiana, Questions
Questions about radon in Louisiana
Common questions8 questions, answered from the figures above
Is radon a problem in Louisiana?
EPA's Map of Radon Zones places 0 of the 64 Louisiana counties it classifies in Zone 1, the highest predicted potential, 0 in Zone 2 and 64 in Zone 3. An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.
How do I get a radon test in Louisiana?
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. The Louisiana radon program is the place to ask about certified testers and any test kit offer it runs.
How to test a homeFree and low-cost kits by stateLouisiana radon program
Who does radon mitigation in Louisiana?
Radon411's Louisiana directory lists 1 certified radon company. 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.
How radon mitigation worksWhat mitigation costsRadon professionals in Louisiana
Which Louisiana counties have the highest radon?
64 of Louisiana's 64 counties have an EPA radon zone published here. Radon411 will not rank counties on data it does not hold, and a zone is a prediction for an area rather than a measurement of any building.
What share of radon tests in Louisiana are high?
CDC has published no statewide radon testing statistics for Louisiana, so we cannot give a figure. Where CDC does publish one, the percentage describes radon tests reported to CDC, not homes.
Which EPA region is Louisiana in?
Louisiana is in EPA Region 6: South Central.
Do I need to test my home in Louisiana?
Yes, wherever you live in the state. 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.
Why does this page show coverage rather than one radon level for Louisiana?
A statewide figure averages counties with very different geology and very different numbers of reported tests, so it hides more than it shows. The county report is the level at which the EPA zone, the geologic potential and the reported testing statistics are actually published, which is why the county table above links to every one of them.
What these figures mean if you own, buy, sell or rent
The zone counts on this page describe counties across Louisiana. They are predictions for areas, and none of them measures your building.
- How to test a home
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.
- Buying a house: radon guide
If you are buying
Ask for past results and any system's post-mitigation test, and test during the sale.
- Selling a house: radon guide
If you are selling
Testing before you list puts the timing in your hands; disclosure rules differ by state.
- Radon in rental homes
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.
How long a test has to run, under what conditions, and what EPA says a result means: the testing standard, in full.
Louisiana, Products
Testing and mitigation products
Whatever the figures for Louisiana show, only a test tells you about one home.
Testing
- Short-term test kitsPassive detectors exposed for a few days under closed-building conditions, then analyzed by a lab.
- Long-term test kitsDetectors exposed for more than 90 days, for a closer picture of the annual average.
- Continuous monitorsPowered devices that log radon on a repeating cycle, often used for transaction tests.
- Digital detectorsConsumer devices that display a running radon reading without a lab.
- Water radon testsKits for radon dissolved in well water, analyzed by a lab.
Mitigation
- Mitigation fansThe inline fan that keeps a soil depressurization system running, sized by the installer.
- System indicatorsU-tube manometers and fan alarms that show whether a mitigation system is still working.
- Sealing materialsCrack, joint and sump sealing used alongside a mitigation system, not instead of one.
Louisiana / Next steps
What to do next
Learn
Know what radon is
What radon is, how it gets indoors, and why a county zone is not a reading for your home.
Learn about radonTest
Test the building you live in
Short-term or long-term, where the device goes, and closed-house conditions.
How to testFix
Bring a high level down
How a mitigation system works, and the retest that confirms it.
How mitigation worksFind a pro
Hire a certified professional
Measurement 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.