Call For A Free Quote: 1-800-299-3578 (toll free)

Radon Levels, Testing and Mitigation in Mississippi

Mississippi has 82 counties, with 0 classified as EPA Zone 1 (highest risk). With an average radon level of 9 pCi/L, Mississippi state testing data reveals significantly elevated risks across multiple counties. Testing is highly recommended.

Mississippi is the 32nd most expansive state in terms of size and the 31st most populous in the entire US.

Mississippi does have an active radon program, dedicated to educating citizens about the risks associated with the deadly gas. You can find more information on Radon, testing and mitigation at the official page.

9
Avg. pCi/L
82
Counties
Zone 1 Counties

Mississippi Radon Map

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

Mississippi Metro Areas

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

Gulfport Metro
5 cities
Hattiesburg Metro
5 cities
Jackson Metro
5 cities
Memphis Metro
5 cities

Mississippi Counties by EPA Radon Zone

All 82 Mississippi counties with their EPA radon zone classification and user-submitted average radon levels.

Zone 2 — Moderate Risk
Predicted avg. indoor levels 2–4 pCi/L
Zone 2 10 counties
Alcorn County Zone 2
Avg:
Chickasaw County Zone 2
Avg:
Clay County Zone 2
Avg:
Lee County Zone 2
Avg: 4.0 pCi/L
Lowndes County Zone 2
Avg:
Noxubee County Zone 2
Avg:
Pontotoc County Zone 2
Avg:
Rankin County Zone 2
Avg:
Union County Zone 2
Avg:
Washington County Zone 2
Avg:
Zone 3 — Low Risk
Predicted avg. indoor levels < 2 pCi/L
Zone 3 72 counties
Adams County Zone 3
Avg:
Amite County Zone 3
Avg:
Attala County Zone 3
Avg:
Benton County Zone 3
Avg:
Bolivar County Zone 3
Avg:
Calhoun County Zone 3
Avg:
Carroll County Zone 3
Avg:
Choctaw County Zone 3
Avg:
Claiborne County Zone 3
Avg:
Clarke County Zone 3
Avg:
Coahoma County Zone 3
Avg: 20.0 pCi/L
Copiah County Zone 3
Avg:
Covington County Zone 3
Avg:
DeSoto County Zone 3
Avg: 5.0 pCi/L
Forrest County Zone 3
Avg:
Franklin County Zone 3
Avg:
George County Zone 3
Avg:
Greene County Zone 3
Avg:
Grenada County Zone 3
Avg:
Hancock County Zone 3
Avg:
Harrison County Zone 3
Avg:
Hinds County Zone 3
Avg:
Holmes County Zone 3
Avg:
Humphreys County Zone 3
Avg:
Issaquena County Zone 3
Avg:
Itawamba County Zone 3
Avg:
Jackson County Zone 3
Avg:
Jasper County Zone 3
Avg:
Jefferson County Zone 3
Avg:
Jefferson Davis County Zone 3
Avg:
Jones County Zone 3
Avg:
Kemper County Zone 3
Avg:
Lafayette County Zone 3
Avg:
Lamar County Zone 3
Avg:
Lauderdale County Zone 3
Avg:
Lawrence County Zone 3
Avg:
Leake County Zone 3
Avg:
Leflore County Zone 3
Avg:
Lincoln County Zone 3
Avg:
Madison County Zone 3
Avg:
Marion County Zone 3
Avg:
Marshall County Zone 3
Avg:
Monroe County Zone 3
Avg:
Montgomery County Zone 3
Avg:
Neshoba County Zone 3
Avg:
Newton County Zone 3
Avg:
Oktibbeha County Zone 3
Avg: 11.0 pCi/L
Panola County Zone 3
Avg:
Pearl River County Zone 3
Avg:
Perry County Zone 3
Avg:
Pike County Zone 3
Avg:
Prentiss County Zone 3
Avg:
Quitman County Zone 3
Avg:
Scott County Zone 3
Avg:
Sharkey County Zone 3
Avg:
Simpson County Zone 3
Avg:
Smith County Zone 3
Avg:
Stone County Zone 3
Avg:
Sunflower County Zone 3
Avg:
Tallahatchie County Zone 3
Avg:
Tate County Zone 3
Avg:
Tippah County Zone 3
Avg:
Tishomingo County Zone 3
Avg:
Tunica County Zone 3
Avg:
Walthall County Zone 3
Avg:
Warren County Zone 3
Avg: 5.0 pCi/L
Wayne County Zone 3
Avg:
Webster County Zone 3
Avg:
Wilkinson County Zone 3
Avg:
Winston County Zone 3
Avg:
Yalobusha County Zone 3
Avg:
Yazoo County Zone 3
Avg:

Mississippi Cities & Towns

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

Abbeville Aberdeen Ackerman Alligator Amory Anguilla Ashland Bailey Baldwyn Banner Bassfield Batesville Bay Saint Louis Bay Springs Beaumont Belden Belen Bellefontaine Belmont Belzoni Benoit Benton Bentonia Beulah Big Creek Biloxi Blue Mountain Blue Springs Bogue Chitto Bolton Booneville Boyle Brandon Braxton Brookhaven Brooklyn Brooksville Bruce Buckatunna Bude Burnsville Byhalia Byram Caledonia Calhoun City Camden Canton Carriere Carrollton Carson Carthage Cary Cascilla Cedarbluff Centreville Charleston Chatham Chunky Clarksdale Cleveland Clinton Coahoma Coffeeville Coila Coldwater Collins Collinsville Columbia Columbus Como Conehatta Corinth Courtland Crawford Crenshaw Crosby Cruger Crystal Springs Daleville De Kalb Decatur Dennis Diamondhead Diberville Doddsville Drew Duck Hill Dumas Duncan Dundee Durant Ecru Edwards Ellisville Enid Enterprise Ethel Etta Eupora Falcon Falkner Fayette Flora Florence Flowood Forest Foxworth French Camp Fulton Gattman Gautier Georgetown Glen Glen Allan Glendora Gloster Golden Goodman Gore Springs Greenville Greenwood Greenwood Springs Grenada Gulfport Gunnison Guntown Hamilton Harrisville Hattiesburg Hazlehurst Heidelberg Hermanville Hernando Hickory Hickory Flat Holcomb Hollandale Holly Bluff Holly Springs Horn Lake Houlka Houston Indianola Inverness Isola Itta Bena Iuka Jackson Jayess Kilmichael Kiln Kokomo Kosciusko Lake Lake Cormorant Lamar Lambert Lauderdale Laurel Lawrence Leakesville Leland Lena Lexington Liberty Little Rock Long Beach Lorman Louin Louise Louisville Lucedale Lumberton Lyon Maben Macon Madison Magee Magnolia Mantachie Mantee Marietta Marion Marks Mathiston Mc Call Creek Mc Carley Mc Cool Mc Henry Mc Lain Mccomb Meadville Mendenhall Meridian Merigold Michigan City Minter City Mize Monticello Mooreville Moorhead Morton Moselle Moss Point Mound Bayou Mount Olive Myrtle Natchez Neely Nesbit Nettleton New Albany New Augusta New Site Newhebron Newton Noxapater Oak Vale Oakland Ocean Springs Okolona Olive Branch Osyka Ovett Oxford Pachuta Paris Pascagoula Pass Christian Pattison Paulding Pearl Pearlington Pelahatchie Perkinston Petal Pheba Philadelphia Philipp Picayune Pickens Pinola Pittsboro Plantersville Pontotoc Pope Poplarville Port Gibson Porterville Potts Camp Prairie Prentiss Preston Pulaski Purvis Quitman Raleigh Randolph Raymond Red Banks Redwood Richland Richton Ridgeland Rienzi Ripley Robinsonville Rolling Fork Rose Hill Rosedale Roxie Ruleville Ruth Sallis Saltillo Sandy Hook Sarah Sardis Satartia Saucier Schlater Scobey Scooba Seminary Senatobia Shannon Shaw Shelby Shubuta Shuqualak Sidon Silver City Silver Creek Sledge Smithdale Smithville Sontag Soso Southaven Starkville State Line Steens Stewart Stonewall Stringer Sturgis Summit Sumrall Sunflower Taylor Taylorsville Tchula Terry Thaxton Tillatoba Tinsley Tiplersville Tishomingo Toomsuba Tremont Tula Tunica Tupelo Tutwiler Tylertown Union Union Church Utica Vaiden Vance Vancleave Vardaman Vaughan Vicksburg Vossburg Walls Walnut Walnut Grove Walthall Water Valley Waterford Waveland Waynesboro Webb Weir Wesson West West Point Wiggins Winona Woodland Woodville Yazoo City

Frequently Asked Questions About Radon in Mississippi

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 Mississippi?
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 Mississippi county in?
Mississippi 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.

Get a Free Radon Quote for Your Mississippi Home

Connect with certified radon testing and mitigation professionals in your area.