Radon zones in Maine
Zone 1: 12, Zone 2: 4, Zone 3: 0. A zone is an area estimate; EPA says all homes should be tested.
- Androscoggin County Zone 1
- Aroostook County Zone 1
- Cumberland County Zone 1
- Franklin County Zone 1
- Hancock County Zone 1
- Kennebec County Zone 1
- Knox County Zone 2
- Lincoln County Zone 1
- Oxford County Zone 1
- Penobscot County Zone 1
- Piscataquis County Zone 1
- Sagadahoc County Zone 2
- Somerset County Zone 1
- Waldo County Zone 2
- Washington County Zone 2
- York County Zone 1
County not listed? See what we left out and why. Leave your email to hear if this data changes.