Falmouth, MA Radon Mitigation and Testing

Q: What is the average radon level in Falmouth, MA?

Based on 1 user-submitted tests, the average radon level is 7.00 pCi/L.

Q: What EPA Radon Zone is Falmouth in?

Falmouth is in Barnstable County, EPA Zone 2.

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.

Avg: 7.00 pCi/L

Barnstable County

EPA Zone 2

1 user test

Perched along Cape Cod's sandy shores in Barnstable County, Falmouth recorded an average radon level of 7.0 pCi/L from initial testing—well above the EPA's 4.0 pCi/L action threshold. The area's glacial deposits and proximity to granite bedrock contribute to elevated radon potential throughout the Cape Cod Metro region. Given this concerning preliminary reading in ZIP 02540, homeowners should prioritize radon testing, particularly in finished basements and lower-level living spaces common in coastal Massachusetts homes.

7.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Falmouth, MA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Falmouth, MA Radon Mitigation

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

Falmouth, MA Radon Testing

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

Falmouth, Massachusetts Radon Levels

User-submitted radon test readings from homes in the Falmouth area.

Radon Level	City	Home Age	Foundation	Submitted
7 pCi/L	Falmouth, MA	21-50 Years	Full Basement	Aug 2021

Have a radon test result for Falmouth? Submit your reading to help other homeowners.

Falmouth Radon Facts

Key details about the radon risk profile for Falmouth and the 02540 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Barnstable County, MA

Zip Code

02540

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

7.00 pCi/L

User Tests Submitted

Falmouth and the 02540 zip code are located in Barnstable County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Falmouth, MA

What is the average radon level in Falmouth, MA?

Based on 1 user-submitted test, the average radon level in Falmouth is 7.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Falmouth in?

Falmouth and the 02540 zip code are in Barnstable County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 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 Massachusetts

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

City	Avg User Radon Level	Submissions
Littleton	9.40 pCi/L	5
Gloucester	8.40 pCi/L	5
Florence	7.40 pCi/L	5
Douglas	12.00 pCi/L	4
Weymouth	8.50 pCi/L	4
Mashpee	5.00 pCi/L	4
Natick	5.00 pCi/L	4
Worcester	17.67 pCi/L	3
Attleboro	10.00 pCi/L	3
Stoneham	9.67 pCi/L	3
Hopkinton	9.33 pCi/L	3
Medford	8.00 pCi/L	3
Boxford	6.67 pCi/L	3
Reading	5.67 pCi/L	3
Haverhill	5.00 pCi/L	3
Melrose	5.00 pCi/L	3
Somerville	4.33 pCi/L	3
Woburn	19.00 pCi/L	2
Marlborough	13.50 pCi/L	2
Cohasset	11.50 pCi/L	2