Falmouth, ME Radon Mitigation and Testing

Q: What EPA Radon Zone is Falmouth in?

Falmouth is in Cumberland County, EPA Zone 1.

Q: How much does radon mitigation cost in Falmouth?

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

Cumberland County

EPA Zone 1

Situated in Cumberland County within the Portland Metro area, Falmouth rests on Maine's complex geology of granite bedrock and glacial deposits that often contribute to elevated radon levels across the region. The community features a mix of historic New England homes and modern suburban development, with many properties having full basements where radon accumulates most readily. With testing data for Falmouth (ZIP 04105) currently limited, residents are strongly encouraged to test their homes given Maine's well-documented radon concerns.

Falmouth, ME Radon Mitigation

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

Falmouth, ME Radon Testing

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

Falmouth Radon Facts

Key details about the radon risk profile for Falmouth and the 04105 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Cumberland County, ME

Zip Code

04105

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Falmouth and the 04105 zip code are located in Cumberland 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 Falmouth, ME

What EPA Radon Zone is Falmouth in?

Falmouth and the 04105 zip code are in Cumberland 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 Falmouth?

Radon mitigation in Falmouth 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 Falmouth?

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