Winthrop, ME Radon Mitigation and Testing

Q: What EPA Radon Zone is Winthrop in?

Winthrop is in Kennebec County, EPA Zone 1.

Q: How much does radon mitigation cost in Winthrop?

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

Kennebec County

EPA Zone 1

Set among Maine's lakes region in Kennebec County, Winthrop sits on glacial outwash deposits over granite bedrock typical of central Maine's geological formation. The community's housing includes lakefront cottages, year-round homes, and historic properties, many with full basements extending into the rocky terrain. Given limited radon testing data for zip code 04364, homeowners should pursue individual testing considering Maine's granite geology and the potential for radon accumulation in below-grade spaces.

Winthrop, ME Radon Mitigation

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

Winthrop, ME Radon Testing

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

Winthrop Radon Facts

Key details about the radon risk profile for Winthrop and the 04364 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Kennebec County, ME

Zip Code

04364

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Winthrop and the 04364 zip code are located in Kennebec 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 Winthrop, ME

What EPA Radon Zone is Winthrop in?

Winthrop and the 04364 zip code are in Kennebec 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 Winthrop?

Radon mitigation in Winthrop 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 Winthrop?

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