South Portland, ME Radon Levels

Q: What is the average radon level in South Portland, ME?

Based on 1 user-submitted tests, the average radon level is 10.00 pCi/L.

Q: What EPA Radon Zone is South Portland in?

South Portland is in Cumberland County, EPA Zone 1.

Q: How much does radon mitigation cost in South Portland?

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

Check local South Portland radon levels and find certified testing and mitigation professionals to keep your home safe

South Portland, ME Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Cumberland County, ME

Zip Code 04106

Avg. User Level 10.00 pCi/L

User Tests 1

Located in Cumberland County within the Portland Metro area, South Portland recorded a concerning average radon level of 10.0 pCi/L in available testing data. This reading significantly exceeds the EPA action level, indicating that homes in the 04106 zip code area should prioritize radon testing and mitigation. The city's coastal location on marine clay deposits overlying granite bedrock creates geological conditions that can trap and concentrate radon gas.

10.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

South Portland, ME Radon Mitigation

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South Portland, ME Radon Levels

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

Radon Level	City	Home Age	Foundation
10 pCi/L	South Portland, ME	51-99 Years	Full Basement

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

Radon FAQ for South Portland, ME

What is the average radon level in South Portland, ME?

Based on 1 user-submitted test, the average radon level in South Portland is 10.00 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 South Portland in?

South Portland and the 04106 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 South Portland?

Radon mitigation in South Portland 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 South Portland?

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 in Maine with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Rumford	6.00 pCi/L	4
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

South Portland, ME Radon Levels

Check local South Portland radon levels and find certified testing and mitigation professionals to keep your home safe

South Portland, ME Radon Facts

South Portland, ME Radon Mitigation

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South Portland, ME Radon Levels

Radon FAQ for South Portland, ME

Most Active Radon Markets in Maine

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