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

Back to Radon Zones in the United States




Radon zones
 Zone 3 (1 county)
 Zone 2 (14 counties)
 Zone 1 (3 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)
Barnstable County
Radon zone : 2

Berkshire County
Radon zone : 2

Bristol County
Radon zone : 2

Dukes County
Radon zone : 2

Essex County
Radon zone : 1

Franklin County
Radon zone : 2

Hampden County
Radon zone : 2

Hampshire County
Radon zone : 2

Middlesex County
Radon zone : 1

Nantucket County
Radon zone : 2

Norfolk County
Radon zone : 2

Plymouth County
Radon zone : 2

Suffolk County
Radon zone : 3

Worcester County
Radon zone : 1


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