Southwest Harbor, ME Radon Mitigation and Testing

Q: What is the average radon level in Southwest Harbor, ME?

Based on 1 user-submitted tests, the average radon level is 13.00 pCi/L.

Q: What EPA Radon Zone is Southwest Harbor in?

Southwest Harbor is in Hancock County, EPA Zone 1.

Q: How much does radon mitigation cost in Southwest Harbor?

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

Avg: 13.00 pCi/L

Hancock County

EPA Zone 1

1 user test

Located on Mount Desert Island in Hancock County, Southwest Harbor recorded a concerning radon level of 13.0 pCi/L from recent testing. This reading significantly exceeds the EPA action level, indicating that homes in zip code 04679 should be tested promptly and mitigated if similar elevated levels are confirmed.

13.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Southwest Harbor, ME Radon Mitigation

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

Southwest Harbor, ME Radon Testing

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

Southwest Harbor, Maine Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
13 pCi/L	Southwest Harbor, ME	21-50 Years	Full Basement	Dec 2020

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

Southwest Harbor Radon Facts

Key details about the radon risk profile for Southwest Harbor and the 04679 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Hancock County, ME

Zip Code

04679

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

13.00 pCi/L

User Tests Submitted

Southwest Harbor and the 04679 zip code are located in Hancock 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 Southwest Harbor, ME

What is the average radon level in Southwest Harbor, ME?

Based on 1 user-submitted test, the average radon level in Southwest Harbor is 13.00 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 Southwest Harbor in?

Southwest Harbor and the 04679 zip code are in Hancock 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 Southwest Harbor?

Radon mitigation in Southwest Harbor 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 Southwest Harbor?

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