Does radon mitigation work?

Yes. Properly installed systems typically reduce radon levels significantly. Post-mitigation testing confirms performance.

Radon Levels, Testing and Mitigation in Louisiana

Q: What radon level is considered high?

The EPA action level is 4.0 pCi/L. Many homeowners also choose to fix levels between 2.0 and 4.0 pCi/L.

Q: How much does radon mitigation cost in Louisiana?

Radon mitigation typically costs between $800 and $2,500 depending on foundation type and severity.

Louisiana has 61 counties, with 0 classified as EPA Zone 1 (highest risk). With an average radon level of 6 pCi/L, Louisiana state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.

Louisiana is the 31st most expansive state and the 25th most populous. The state does not have an active radon program. You can, however find more information about Radon, testing and mitigation at the Department of Environmental Quality page.

Avg. pCi/L

Counties

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Zone 1 Counties

Louisiana Radon Map

Zone 1 — High

Zone 2 — Moderate

Zone 3 — Low

Louisiana Metro Areas

Explore radon data organized by metro region, including average levels, hotspot cities, and local mitigation professionals.

Most Active Radon Markets in Louisiana

Cities with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
New Orleans	8.00 pCi/L	1

Louisiana Counties by EPA Radon Zone

All 61 Louisiana counties with their EPA radon zone classification and user-submitted average radon levels.

Zone 3 — Low Risk

Predicted avg. indoor levels < 2 pCi/L

Zone 3 61 counties

Acadia Parish Zone 3

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Allen Parish Zone 3

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Ascension Parish Zone 3

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Assumption Parish Zone 3

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Avoyelles Parish Zone 3

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Beauregard Parish Zone 3

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Bienville Parish Zone 3

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Bossier Parish Zone 3

Avg: 10.0 pCi/L

Caddo Parish Zone 3

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Calcasieu Parish Zone 3

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Caldwell Parish Zone 3

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Cameron Parish Zone 3

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Catahoula Parish Zone 3

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Claiborne Parish Zone 3

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Concordia Parish Zone 3

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De Soto Parish Zone 3

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East Baton Rouge Parish Zone 3

Avg: 4.0 pCi/L

East Carroll Parish Zone 3

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East Feliciana Parish Zone 3

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Evangeline Parish Zone 3

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Franklin Parish Zone 3

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Grant Parish Zone 3

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Iberia Parish Zone 3

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Iberville Parish Zone 3

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Jackson Parish Zone 3

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Jefferson Davis Parish Zone 3

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Jefferson Parish Zone 3

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La Salle Parish Zone 3

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Lafayette Parish Zone 3

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Lafourche Parish Zone 3

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Lincoln Parish Zone 3

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Livingston Parish Zone 3

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Madison Parish Zone 3

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Morehouse Parish Zone 3

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Natchitoches Parish Zone 3

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Orleans Parish Zone 3

Avg: 8.0 pCi/L

Ouachita Parish Zone 3

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Plaquemines Parish Zone 3

Avg: 2.0 pCi/L

Pointe Coupee Parish Zone 3

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Rapides Parish Zone 3

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Red River Parish Zone 3

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Richland Parish Zone 3

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Sabine Parish Zone 3

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St. Charles Parish Zone 3

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St. James Parish Zone 3

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St. John the Baptist Parish Zone 3

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St. Landry Parish Zone 3

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St. Mary Parish Zone 3

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St. Tammany Parish Zone 3

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Tangipahoa Parish Zone 3

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Tensas Parish Zone 3

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Terrebonne Parish Zone 3

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Union Parish Zone 3

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Vermilion Parish Zone 3

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Vernon Parish Zone 3

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Washington Parish Zone 3

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Webster Parish Zone 3

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West Baton Rouge Parish Zone 3

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West Carroll Parish Zone 3

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West Feliciana Parish Zone 3

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Winn Parish Zone 3

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Louisiana Cities & Towns

Browse radon data for individual cities across Louisiana. Each city page includes user-submitted radon levels, local contractors, and mitigation resources.

Abbeville Abita Springs Acme Addis Aimwell Akers Albany Alexandria Ama Amite Anacoco Angie Arabi Arcadia Arnaudville Ashland Athens Atlanta Baker Baldwin Ball Barataria Barksdale Afb Basile Baskin Bastrop Batchelor Baton Rouge Belcher Bell City Belle Chasse Belle Rose Belmont Bentley Benton Bernice Berwick Bethany Bienville Bogalusa Bonita Bossier City Bourg Boutte Boyce Braithwaite Branch Breaux Bridge Broussard Brusly Bunkie Buras Bush Calhoun Cameron Campti Carencro Carville Castor Center Point Chalmette Chatham Chauvin Cheneyville Choudrant Church Point Clayton Clinton Cloutierville Colfax Collinston Columbia Convent Converse Cotton Valley Cottonport Coushatta Covington Creole Crowley Cut Off Darrow Delcambre Delhi Denham Springs Dequincy Deridder Des Allemands Destrehan Deville Dodson Donaldsonville Donner Downsville Doyline Dry Creek Dry Prong Dubach Dubberly Dulac Duson Edgard Effie Egan Elm Grove Elmer Elton Enterprise Epps Erath Eros Erwinville Ethel Eunice Evangeline Evans Evergreen Farmerville Ferriday Flatwoods Florien Fluker Folsom Fordoche Forest Hill Fort Necessity Fort Polk Franklin Franklinton French Settlement Frierson Galliano Garyville Geismar Georgetown Gheens Gibsland Gibson Gilbert Gilliam Glenmora Gloster Glynn Golden Meadow Goldonna Gonzales Grambling Gramercy Grand Cane Grand Chenier Grand Isle Gray Grayson Greensburg Greenwell Springs Greenwood Gretna Grosse Tete Gueydan Hackberry Hahnville Hall Summit Hammond Harrisonburg Harvey Haughton Haynesville Heflin Hessmer Hineston Holden Homer Hornbeck Hosston Houma Husser Ida Independence Iota Iowa Jackson Jamestown Jarreau Jeanerette Jena Jennings Jones Jonesboro Jonesville Kaplan Keatchie Keithville Kelly Kenner Kentwood Kinder Krotz Springs Kurthwood La Place Labadieville Lacombe Lafayette Lafitte Lake Arthur Lake Charles Lake Providence Lakeland Larose Lecompte Leesville Lena Lettsworth Lillie Lisbon Livingston Livonia Lockport Logansport Longville Loranger Loreauville Lottie Luling Lutcher Madisonville Mamou Mandeville Mangham Mansfield Mansura Many Maringouin Marion Marksville Marrero Marthaville Mathews Maurepas Maurice Melrose Melville Mer Rouge Meraux Merryville Metairie Minden Mittie Monroe Montegut Monterey Montgomery Mooringsport Mora Moreauville Morgan City Morganza Morrow Morse Mount Airy Mount Hermon Napoleonville Natchez Natchitoches New Iberia New Llano New Orleans New Roads Newellton Noble Norco Norwood Oak Grove Oak Ridge Oakdale Oberlin Oil City Olla Opelousas Oscar Otis Palmetto Paradis Patterson Paulina Pearl River Pelican Pierre Part Pine Grove Pineville Pioneer Pitkin Plain Dealing Plaquemine Plattenville Plaucheville Pleasant Hill Pollock Ponchatoula Port Allen Port Barre Port Sulphur Prairieville Pride Princeton Provencal Quitman Raceland Ragley Rayne Rayville Reeves Reserve Ringgold Roanoke Robeline Robert Rodessa Rosedale Roseland Rougon Ruston Saint Amant Saint Bernard Saint Francisville Saint Gabriel Saint James Saint Joseph Saint Landry Saint Martinville Saint Rose Saline Sarepta Schriever Scott Shongaloo Shreveport Sibley Sicily Island Sieper Sikes Simmesport Simsboro Singer Slaughter Slidell Sondheimer Sorrento Spearsville Springfield Springhill Starks Sterlington Stonewall Sugartown Sulphur Summerfield Sunset Sunshine Tallulah Theriot Thibodaux Tickfaw Transylvania Trout Tullos Vacherie Venice Ventress Vidalia Ville Platte Vinton Violet Vivian Walker Washington Waterproof Welsh West Monroe Westlake Westwego White Castle Wilson Winnfield Winnsboro Wisner Woodworth Youngsville Zachary Zwolle

Frequently Asked Questions About Radon in Louisiana

What radon level is considered "high"?

The EPA action level is 4.0 pCi/L — many homeowners also choose to fix levels between 2.0 and 4.0 pCi/L. Any home with levels at or above 4.0 pCi/L should be mitigated.

How much does radon mitigation cost in Louisiana?

Radon mitigation typically costs between $800 and $2,500, depending on foundation type and radon severity. A standard sub-slab depressurization system usually falls in the $1,000–$1,500 range.

Does mitigation actually work?

Yes — properly installed systems typically reduce radon levels by up to 99%. A post-mitigation test confirms the system is working correctly, and many homeowners re-test periodically.

Should I test again after mitigation?

Yes. A post-mitigation test is the proof your system is working. The EPA recommends testing within 30 days of installation and retesting every two years.

What EPA Radon Zone is my Louisiana county in?

Louisiana counties are classified into three EPA Radon Zones. Zone 1 (highest risk, >4 pCi/L) indicates the most concern. Zone 2 (moderate, 2–4 pCi/L) and Zone 3 (lowest, <2 pCi/L) round out the classification. Use the county directory above to find your specific county's zone and data.

Radon Levels, Testing and Mitigation in Louisiana

Louisiana Radon Map

Louisiana Metro Areas

Most Active Radon Markets in Louisiana

Louisiana Counties by EPA Radon Zone

Louisiana Cities & Towns

Frequently Asked Questions About Radon in Louisiana

Get a Free Radon Quote for Your Louisiana Home

Free Radon Mitigation Quote

Free Radon Mitigation Quote