Charleston, ME Radon Mitigation and Testing

Q: What EPA Radon Zone is Charleston in?

Charleston is in Penobscot County, EPA Zone 1.

Q: How much does radon mitigation cost in Charleston?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Penobscot County

EPA Zone 1

Situated in Penobscot County near Bangor, Charleston features Maine's typical crystalline bedrock geology with granite formations that can contain naturally occurring radioactive minerals. The area's rural character includes many older homes with stone foundations and newer properties with various basement configurations. While specific radon data for this community isn't currently available, Maine's geological diversity makes individual testing important for all residents.

Charleston, ME Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Charleston, ME Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Charleston Radon Facts

Key details about the radon risk profile for Charleston and the 04422 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Penobscot County, ME

Zip Code

04422

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Charleston and the 04422 zip code are located in Penobscot County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Charleston, ME

What EPA Radon Zone is Charleston in?

Charleston and the 04422 zip code are in Penobscot County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Charleston?

Radon mitigation in Charleston typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Charleston?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Maine

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Rumford	5.67 pCi/L	3
York	8.50 pCi/L	2
Saco	7.50 pCi/L	2
Hampden	4.50 pCi/L	2
Scarborough	14.00 pCi/L	1
Kittery	12.00 pCi/L	1
South Portland	10.00 pCi/L	1
Portland	4.00 pCi/L	1