Long Island, ME Radon Mitigation and Testing

Q: What EPA Radon Zone is Long Island in?

Long Island is in Cumberland County, EPA Zone 1.

Q: How much does radon mitigation cost in Long Island?

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

Positioned in Cumberland County within the Portland metropolitan area, Long Island rests on glacial marine sediments in Casco Bay where radon testing data remains scarce. This island community in zip code 04050 features seasonal cottages and year-round homes, many built on granite foundations or concrete slabs suited to coastal conditions. While specific radon readings aren't available, testing is advisable given Maine's glacial geology and the potential for radon concentration in closed residential spaces.

Long Island, ME Radon Mitigation

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

Long Island, ME Radon Testing

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

Long Island Radon Facts

Key details about the radon risk profile for Long Island and the 04050 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Cumberland County, ME

Zip Code

04050

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Long Island and the 04050 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 Long Island, ME

What EPA Radon Zone is Long Island in?

Long Island and the 04050 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 Long Island?

Radon mitigation in Long Island 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 Long Island?

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