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Radon Levels, Testing and Mitigation in Alabama

Alabama has 67 counties, with 13 classified as EPA Zone 1 (highest risk). With an average radon level of 6.79 pCi/L, Alabama state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.

Alabama is the 30th most expansive state and the 23rd most populous. From December 1986 through May 1987, the State Department of Public Health and the EPA conducted studies to determine the probability of elevated radon levels in Alabama homes. These studies consisted of 789 tests that were carried out in residences of volunteers throughout the State. Additionally, a random sampling of residences resulted in an additional 1326 tests. Nearly 2500 of those tests have been 4.0 pCi/l or higher. Of those, 245 have been between 20 and 100 pCi/l, and 9 have exceeded 100 pCi/l. As more test results surface, it has become apparent that radon is a significant problem everywhere in Alabama.

The state also has a very commendable Radon program, with a wide variety of resources and information available on the official site.

6.79
Avg. pCi/L
67
Counties
13
Zone 1 Counties

Alabama Radon Map

Alabama radon levels by county
Zone 1 — High
Zone 2 — Moderate
Zone 3 — Low

Alabama Metro Areas

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

Auburn Metro
5 cities
Birmingham Metro
5 cities
Columbus Metro
5 cities
Daphne Metro
5 cities
Decatur Metro
5 cities
Dothan Metro
5 cities
Florence Metro
5 cities
Huntsville Metro
5 cities
Mobile Metro
5 cities
Montgomery Metro
5 cities
Tuscaloosa Metro
5 cities

Most Active Radon Markets in Alabama

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

CityAvg User Radon LevelSubmissions
Huntsville 9.00 pCi/L 2
Birmingham 7.00 pCi/L 2
Madison 4.00 pCi/L 1

Alabama Counties by EPA Radon Zone

All 67 Alabama counties with their EPA radon zone classification and user-submitted average radon levels.

Zone 1 — High Risk
Predicted avg. indoor levels > 4.0 pCi/L
Zone 1 13 counties
Calhoun County Zone 1
Avg: 6.0 pCi/L
Clay County Zone 1
Avg:
Cleburne County Zone 1
Avg: 10.0 pCi/L
Colbert County Zone 1
Avg: 11.0 pCi/L
Coosa County Zone 1
Avg:
Franklin County Zone 1
Avg:
Jackson County Zone 1
Avg:
Lauderdale County Zone 1
Avg: 6.0 pCi/L
Lawrence County Zone 1
Avg:
Limestone County Zone 1
Avg:
Madison County Zone 1
Avg: 7.4 pCi/L
Morgan County Zone 1
Avg: 6.0 pCi/L
Talladega County Zone 1
Avg:
Zone 2 — Moderate Risk
Predicted avg. indoor levels 2–4 pCi/L
Zone 2 33 counties
Autauga County Zone 2
Avg: 5.0 pCi/L
Barbour County Zone 2
Avg:
Bibb County Zone 2
Avg:
Blount County Zone 2
Avg:
Bullock County Zone 2
Avg:
Cherokee County Zone 2
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Chilton County Zone 2
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Cullman County Zone 2
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Dallas County Zone 2
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DeKalb County Zone 2
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Elmore County Zone 2
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Etowah County Zone 2
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Fayette County Zone 2
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Greene County Zone 2
Avg:
Hale County Zone 2
Avg:
Jefferson County Zone 2
Avg: 7.0 pCi/L
Lamar County Zone 2
Avg:
Lee County Zone 2
Avg: 9.5 pCi/L
Lowndes County Zone 2
Avg:
Macon County Zone 2
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Marion County Zone 2
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Marshall County Zone 2
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Montgomery County Zone 2
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Perry County Zone 2
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Pickens County Zone 2
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Randolph County Zone 2
Avg: 8.0 pCi/L
Russell County Zone 2
Avg:
Shelby County Zone 2
Avg: 4.0 pCi/L
St. Clair County Zone 2
Avg:
Sumter County Zone 2
Avg:
Tuscaloosa County Zone 2
Avg:
Walker County Zone 2
Avg:
Winston County Zone 2
Avg: 5.0 pCi/L
Zone 3 — Low Risk
Predicted avg. indoor levels < 2 pCi/L
Zone 3 21 counties
Baldwin County Zone 3
Avg:
Butler County Zone 3
Avg:
Chambers County Zone 3
Avg: 4.0 pCi/L
Choctaw County Zone 3
Avg:
Clarke County Zone 3
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Coffee County Zone 3
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Conecuh County Zone 3
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Covington County Zone 3
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Crenshaw County Zone 3
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Dale County Zone 3
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Escambia County Zone 3
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Geneva County Zone 3
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Henry County Zone 3
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Houston County Zone 3
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Marengo County Zone 3
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Mobile County Zone 3
Avg: 4.0 pCi/L
Monroe County Zone 3
Avg:
Pike County Zone 3
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Tallapoosa County Zone 3
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Washington County Zone 3
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Wilcox County Zone 3
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Alabama Cities & Towns

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

Abbeville Adamsville Addison Adger Akron Alabaster Alberta Albertville Alexander City Alexandria Aliceville Alpine Altoona Andalusia Anderson Annemanie Anniston Arab Ardmore Ariton Arley Arlington Ashford Ashland Ashville Athens Atmore Attalla Auburn Autaugaville Axis Baileyton Banks Bankston Bay Minette Bayou La Batre Bear Creek Beatrice Beaverton Berry Bessemer Billingsley Birmingham Black Blountsville Boaz Boligee Bon Secour Brantley Bremen Brent Brewton Bridgeport Brierfield Brilliant Brookwood Brownsboro Brundidge Bryant Buhl Butler Calera Camden Camp Hill Campbell Carbon Hill Carlton Carrollton Castleberry Catherine Cecil Cedar Bluff Centre Centreville Chancellor Chatom Chelsea Cherokee Childersburg Chunchula Citronelle Clanton Clayton Cleveland Clio Clopton Coden Coffee Springs Coffeeville Coker Collinsville Columbia Columbiana Coosada Cordova Cottondale Cottonwood Courtland Cowarts Coy Cragford Crane Hill Creola Cropwell Crossville Cuba Cullman Cusseta Dadeville Daleville Danville Daphne Dauphin Island Daviston Dawson Deatsville Decatur Deer Park Delta Demopolis Detroit Dickinson Dixons Mills Dolomite Dora Dothan Double Springs Dozier Duncanville Dutton Eastaboga Echola Eclectic Eight Mile Elba Elberta Eldridge Elkmont Elmore Elrod Emelle Empire Enterprise Epes Equality Estillfork Ethelsville Eufaula Eutaw Eva Evergreen Fackler Fairfield Fairhope Falkville Faunsdale Fayette Fitzpatrick Five Points Flat Rock Flomaton Florala Florence Foley Forest Home Forkland Fort Deposit Fort Mitchell Fort Payne Fort Rucker Fosters Franklin Frankville Frisco City Fruitdale Fruithurst Fultondale Fyffe Gadsden Gainestown Gainesville Gallant Gallion Gardendale Gaylesville Geneva Georgiana Geraldine Gilbertown Glenwood Goodwater Gordo Gordon Goshen Grady Graham Grand Bay Grant Graysville Greensboro Greenville Grove Hill Groveoak Guin Gulf Shores Guntersville Gurley Hackleburg Haleyville Hamilton Hanceville Hardaway Harpersville Hartford Hartselle Harvest Hatchechubbee Hayden Hayneville Hazel Green Headland Heflin Helena Henagar Higdon Highland Home Hillsboro Hodges Holly Pond Hollytree Hollywood Honoraville Hope Hull Horton Houston Huntsville Hurtsboro Ider Irvington Jachin Jack Jackson Jacksons Gap Jacksonville Jasper Jemison Jones Joppa Kellyton Kennedy Killen Kimberly Kinston Knoxville Laceys Spring Lafayette Lanett Langston Lapine Lawley Leeds Leesburg Leighton Lenox Leroy Lester Letohatchee Lexington Lillian Lincoln Linden Lineville Lisman Little River Livingston Locust Fork Logan Louisville Lower Peach Tree Lowndesboro Loxley Luverne Lynn Madison Magnolia Magnolia Springs Maplesville Marbury Marion Marion Junction Mathews Maylene Mc Calla Mc Intosh Mc Kenzie Melvin Mentone Meridianville Midland City Midway Millbrook Millport Millry Minter Mobile Monroeville Montevallo Montgomery Moody Morris Morvin Moulton Moundville Mount Hope Mount Olive Mount Vernon Mulga Munford Muscadine Muscle Shoals Nauvoo Needham New Brockton New Hope New Market Newbern Newton Newville Northport Notasulga Oakman Odenville Ohatchee Oneonta Opelika Opp Orange Beach Orrville Owens Cross Roads Oxford Ozark Paint Rock Pansey Parrish Pelham Pell City Pennington Perdido Peterman Phenix City Phil Campbell Piedmont Pike Road Pine Apple Pine Hill Pinson Pisgah Pittsview Plantersville Pleasant Grove Prattville Princeton Quinton Ragland Rainbow City Rainsville Ralph Ramer Ranburne Randolph Range Red Bay Red Level Reform Remlap Repton Riverside Roanoke Robertsdale Rockford Rogersville Russellville Rutledge Safford Saint Stephens Salem Samson Saraland Sardis Satsuma Sawyerville Scottsboro Seale Section Selma Seminole Semmes Sheffield Shelby Shorter Shorterville Silas Silverhill Skipperville Slocomb Smiths Station Somerville Spanish Fort Springville Spruce Pine Stanton Stapleton Steele Sterrett Stevenson Stockton Sulligent Sumiton Summerdale Sweet Water Sylacauga Sylvania Talladega Tallassee Tanner Theodore Thomaston Thomasville Thorsby Tibbie Titus Toney Town Creek Townley Toxey Trafford Trenton Trinity Troy Trussville Tuscaloosa Tuscumbia Tuskegee Tuskegee Institute Tyler Union Grove Union Springs Uniontown Uriah Valhermoso Springs Valley Valley Head Vance Vandiver Verbena Vernon Vina Vincent Vinegar Bend Vinemont Vredenburgh Wadley Wagarville Ward Warrior Waterloo Waverly Weaver Webb Wedowee Wellington Weogufka West Blocton Wetumpka Whatley Wilmer Wilsonville Winfield Wing Woodland Woodstock Woodville York

Frequently Asked Questions About Radon in Alabama

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 Alabama?
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 Alabama county in?
Alabama 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.

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