EPA radon zones
Louisiana radon map: every county's zone
0 of Louisiana's 64 counties are EPA radon zone 1 (predicted average above 4 pCi/L), 0 are zone 2 and 64 are zone 3. High readings occur in every zone, so EPA recommends testing every home.
Acadia ParishZone 3
Allen ParishZone 3
Ascension ParishZone 3
Assumption ParishZone 3
Avoyelles ParishZone 3
Beauregard ParishZone 3
Bienville ParishZone 3
Bossier ParishZone 3
Caddo ParishZone 3
Calcasieu ParishZone 3
Caldwell ParishZone 3
Cameron ParishZone 3
Catahoula ParishZone 3
Claiborne ParishZone 3
Concordia ParishZone 3
De Soto ParishZone 3
East Baton Rouge ParishZone 3
East Carroll ParishZone 3
East Feliciana ParishZone 3
Evangeline ParishZone 3
Franklin ParishZone 3
Grant ParishZone 3
Iberia ParishZone 3
Iberville ParishZone 3
Jackson ParishZone 3
Jefferson Davis ParishZone 3
Jefferson ParishZone 3
La Salle ParishZone 3
Lafayette ParishZone 3
Lafourche ParishZone 3
Lincoln ParishZone 3
Livingston ParishZone 3
Madison ParishZone 3
Morehouse ParishZone 3
Natchitoches ParishZone 3
Orleans ParishZone 3
Ouachita ParishZone 3
Plaquemines ParishZone 3
Pointe Coupee ParishZone 3
Rapides ParishZone 3
Red River ParishZone 3
Richland ParishZone 3
Sabine ParishZone 3
St. Bernard ParishZone 3
St. Charles ParishZone 3
St. Helena ParishZone 3
St. James ParishZone 3
St. John the Baptist ParishZone 3
St. Landry ParishZone 3
St. Martin ParishZone 3
St. Mary ParishZone 3
St. Tammany ParishZone 3
Tangipahoa ParishZone 3
Tensas ParishZone 3
Terrebonne ParishZone 3
Union ParishZone 3
Vermilion ParishZone 3
Vernon ParishZone 3
Washington ParishZone 3
Webster ParishZone 3
West Baton Rouge ParishZone 3
West Carroll ParishZone 3
West Feliciana ParishZone 3
Winn ParishZone 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.
Louisiana cities: water and radon
Source: EPA Map of Radon Zones.