Eliot radon mitigation — local context
Eliot sits in York County, Maine, an EPA Radon Zone 1 county. That's the highest of the EPA's three tiers, where predicted average indoor radon runs above the 4 pCi/L action level (EPA Map of Radon Zones). One thing to correct: the older version of this page called Eliot "granite-heavy." It isn't. Eliot's bedrock is the metasedimentary Eliot and Kittery Formation phyllite, and USGS research (Yang et al., Maine Geological Survey) ties Maine's radon to granitic intrusions, with wells nearest them most at risk. The real driver here is the Zone 1 rating plus private bedrock wells. That same USGS study found 29% of sampled Maine wells over the 4,000 pCi/L water limit, concentrated in southern and coastal Maine where Eliot drains to the Piscataqua River, so any home on a well should test both air and water. We're radon-certified (RMS-113966). Radon mitigation runs $900 to $6,000, most jobs $1,950 to $2,250; the radon test is $50, credited toward the job if you proceed.
What a recent customer said
603 Basement Solutions has a great team to work with. All involved are professional and courteous. The Radon Mitigation quote I received was the final price. I understand unseen problems occur, but I was fortunate. They estimated my radon levels would drop to around 2 but my monitor is reading a 7 day average of .4, WELL below what I was promised and even expected. Highly recommend 603 Basement Solutions
Frequently asked questions
Is Eliot, Maine a high-radon area?
Yes. Eliot is in York County, which the EPA Map of Radon Zones classifies as Zone 1, the agency's highest tier, where the predicted average indoor radon runs above the 4 pCi/L action level. Statewide, roughly 1 in 3 Maine homes test above 4 pCi/L (Maine CDC, via the Maine Indoor Air Quality Council), well above the U.S. average of about 1.3 pCi/L. Any Eliot home should test.
Is Eliot's radon really caused by granite under the town?
No, and that's a common error. Eliot's bedrock is the metasedimentary Eliot and Kittery Formation phyllite, not granite. USGS research (Yang et al., Maine Geological Survey) found Maine's radon tracks granitic intrusions, with wells nearest them most at risk. For an Eliot home, the drivers are the county's EPA Zone 1 rating and private bedrock wells, not granite directly beneath the town.
If my Eliot home is on a private well, do I need to test the water for radon too?
Yes. A USGS study (Yang et al.) found 29% of sampled Maine private bedrock wells exceeded the 4,000 pCi/L radon-in-water limit, concentrated in southern and coastal Maine where Eliot sits. Radon escapes from well water into your indoor air, so test both. Our radon test is $50, credited toward the job if you proceed; mitigation runs $900 to $6,000, most jobs $1,950 to $2,250.