Radon by ZIP

Radon zones in Mississippi

Last updated

EPA’s Map of Radon Zones places 82 Mississippi counties in its three radon potential zones: 0 in Zone 1 (highest), 8 in Zone 2 (moderate), and 74 in Zone 3 (low).

0Zone 1 · Highest potential
8Zone 2 · Moderate potential
74Zone 3 · Low potential

What this means for Mississippi homes

Most Mississippi counties fall in Zone 3. EPA predicts lower average indoor levels (below 2 pCi/L) across much of Mississippi. That does not mean your home is low: EPA notes that elevated levels are found in Zone 3 counties too.

EPA’s guidance is the same everywhere: test your home, fix it if the level is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L. The zone map is from 1993 and should not be used to decide whether a single home needs testing.

Mississippi radon program

EPA lists the following state contact for Mississippi: the state radon program. Website: msdh.ms.gov/page/44,0,100.html. State programs can tell you about local testing data, free or discounted test kits, disclosure rules for home sales, and credentialed radon professionals.

Mississippi counties and their EPA radon zones

CountyEPA radon zone
Adams CountyZone 3
Alcorn CountyZone 2
Amite CountyZone 3
Attala CountyZone 3
Benton CountyZone 3
Bolivar CountyZone 3
Calhoun CountyZone 3
Carroll CountyZone 3
Chickasaw CountyZone 2
Choctaw CountyZone 3
Claiborne CountyZone 3
Clarke CountyZone 3
Clay CountyZone 2
Coahoma CountyZone 3
Copiah CountyZone 3
Covington CountyZone 3
DeSoto CountyZone 3
Forrest CountyZone 3
Franklin CountyZone 3
George CountyZone 3
Greene CountyZone 3
Grenada CountyZone 3
Hancock CountyZone 3
Harrison CountyZone 3
Hinds CountyZone 3
Holmes CountyZone 3
Humphreys CountyZone 3
Issaquena CountyZone 3
Itawamba CountyZone 3
Jackson CountyZone 3
Jasper CountyZone 3
Jefferson CountyZone 3
Jefferson Davis CountyZone 3
Jones CountyZone 3
Kemper CountyZone 3
Lafayette CountyZone 3
Lamar CountyZone 3
Lauderdale CountyZone 3
Lawrence CountyZone 3
Leake CountyZone 3
Lee CountyZone 2
Leflore CountyZone 3
Lincoln CountyZone 3
Lowndes CountyZone 2
Madison CountyZone 3
Marion CountyZone 3
Marshall CountyZone 3
Monroe CountyZone 3
Montgomery CountyZone 3
Neshoba CountyZone 3
Newton CountyZone 3
Noxubee CountyZone 2
Oktibbeha CountyZone 3
Panola CountyZone 3
Pearl River CountyZone 3
Perry CountyZone 3
Pike CountyZone 3
Pontotoc CountyZone 2
Prentiss CountyZone 3
Quitman CountyZone 3
Rankin CountyZone 3
Scott CountyZone 3
Sharkey CountyZone 3
Simpson CountyZone 3
Smith CountyZone 3
Stone CountyZone 3
Sunflower CountyZone 3
Tallahatchie CountyZone 3
Tate CountyZone 3
Tippah CountyZone 3
Tishomingo CountyZone 3
Tunica CountyZone 3
Union CountyZone 2
Walthall CountyZone 3
Warren CountyZone 3
Washington CountyZone 3
Wayne CountyZone 3
Webster CountyZone 3
Wilkinson CountyZone 3
Winston CountyZone 3
Yalobusha CountyZone 3
Yazoo CountyZone 3

County names follow the 2020 Census. Zones from the EPA Map of Radon Zones (text version). Rows marked “zone of” use the zone EPA gave the predecessor or surrounding county.

Next steps: read how to test your home, check a result with the level calculator, or look up a single address by ZIP code.

Sources

  1. U.S. EPA, EPA Map of Radon Zones (text version)
  2. U.S. EPA, EPA Map of Radon Zones and Supplemental Information (state radon contacts)
  3. U.S. EPA, EPA Maps of Radon Zones and Supporting Documents by State