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Map of Radon Zones in Connecticut based on Environmental Protection Agency (EPA) data

Back to Radon Zones in the United States




Radon zones
 Zone 3 (1 county)
 Zone 2 (3 counties)
 Zone 1 (4 counties)
  Highest Potential: counties have a predicted average indoor radon screening level greater than 4 pCi/L (pico curies per liter) (red zones)
  Moderate Potential: counties have a predicted average indoor radon screening level between 2 and 4 pCi/L (orange zones)
  Low Potential: counties have a predicted average indoor radon screening level less than 2 pCi/L (yellow zones)
Fairfield County
Radon zone : 1

Hartford County
Radon zone : 3

Litchfield County
Radon zone : 2

Middlesex County
Radon zone : 1

New Haven County
Radon zone : 1

New London County
Radon zone : 1

Tolland County
Radon zone : 2

Windham County
Radon zone : 2


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