South Portland, ME Radon Mitigation and Testing

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.

Avg: 10.00 pCi/L

Cumberland County

EPA Zone 1

1 user test

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

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

South Portland, ME Radon Testing

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

South Portland, Maine Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
10 pCi/L	South Portland, ME	51-99 Years	Full Basement	Mar 2020

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

South Portland Radon Facts

Key details about the radon risk profile for South Portland and the 04106 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Cumberland County, ME

Zip Code

04106

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

10.00 pCi/L

User Tests Submitted

South Portland and the 04106 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 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 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