Radon zones in Connecticut
Zone 1: 4, Zone 2: 3, Zone 3: 1. A zone is an area estimate; EPA says all homes should be tested.
- Fairfield County Zone 1
- Hartford County Zone 3
- Litchfield County Zone 2
- Middlesex County Zone 1
- New Haven County Zone 1
- New London County Zone 1
- Tolland County Zone 2
- Windham County Zone 2
County not listed? See what we left out and why. Leave your email to hear if this data changes.