Radon zones in Massachusetts
Zone 1: 3, Zone 2: 10, Zone 3: 1. A zone is an area estimate; EPA says all homes should be tested.
- Barnstable County Zone 2
- Berkshire County Zone 2
- Bristol County Zone 2
- Dukes County Zone 2
- Essex County Zone 1
- Franklin County Zone 2
- Hampden County Zone 2
- Hampshire County Zone 2
- Middlesex County Zone 1
- Nantucket County Zone 2
- Norfolk County Zone 2
- Plymouth County Zone 2
- Suffolk County Zone 3
- Worcester County Zone 1
County not listed? See what we left out and why. Leave your email to hear if this data changes.