EPA radon zones
Mississippi radon map: every county's zone
0 of Mississippi's 82 counties are EPA radon zone 1 (predicted average above 4 pCi/L), 8 are zone 2 and 74 are zone 3. High readings occur in every zone, so EPA recommends testing every home.
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
How much does radon mitigation cost?
Most single-family systems cost $800 to $2,500 installed, depending on foundation type and how many suction points are needed. A follow-up test confirms the system works.
What do the zones mean?
EPA radon zones describe counties, not houses. Zone 1 counties have a predicted average indoor level above 4 picocuries per liter (pCi/L), Zone 2 between 2 and 4, Zone 3 below 2. Homes with high levels are found in every zone, which is why EPA recommends that every home be tested, and fixed at 4 pCi/L or above.
Mississippi cities: water and radon
Source: EPA Map of Radon Zones.