Berwick radon mitigation — local context
In Berwick, high radon is the expected default, not the exception. The EPA puts York County, Maine in Radon Zone 1 — its highest tier, for counties where the predicted average indoor level runs over the 4 pCi/L action level (EPA Map of Radon Zones, Maine). The USGS report behind that map says it plainly: York is one of the Maine counties with an average indoor radon value above 4 pCi/L, and in its survey, 25% to 50% of York County homes tested over the action level (USGS Open-File Report 93-292-A). Statewide it is about 1 in 3 homes, and Maine's average reading is 5.9 pCi/L — close to four and a half times the national average of 1.3 (Maine CDC). The reason is the bedrock under southern Maine: the USGS ties Maine's high readings to two-mica and alkaline granite, pegmatites, and faults, not just "granite" in general. That is why radon shows up on the older, fieldstone-foundation homes common around Berwick. So a radon test is standard at the closing table here, and Maine law (14 M.R.S. §6030-D) requires testing and disclosure for rentals. We are a state-certified radon mitigation company. A radon test is $50, the inspection and estimate are free, and most mitigation runs $900 to $6,000.
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"
— Jeff Eddy, 5 stars (Google)
Frequently asked questions
Is radon a problem in Berwick, ME?
Yes. Berwick sits in York County, which the EPA classifies as Radon Zone 1 — its highest-risk tier, where the predicted average indoor level is over the 4 pCi/L action level (EPA Map of Radon Zones, Maine). In the USGS survey for York County, 25% to 50% of homes tested came in above 4 pCi/L (USGS Open-File Report 93-292-A). Statewide it is about 1 in 3 homes, and Maine's average reading is 5.9 pCi/L (Maine CDC). The only way to know your number is to test; a radon test from 603 is $50, and the inspection and estimate are free.
Why is radon so high in this part of Maine?
It is the geology. The USGS links Maine's high radon to specific bedrock — two-mica and alkaline granite, pegmatites, and faults — not just any granite (USGS Open-File Report 93-292-A). That radon-bearing rock under southern Maine pushes gas up through the soil and into the basement, which is why older Berwick homes with fieldstone foundations so often test high.
Do I need to test for radon when I sell or rent a home in Berwick?
For rentals, yes — Maine law (14 M.R.S. §6030-D) requires landlords to test the unit and disclose the result in writing, and a tenant can end the lease if the reading is 4.0 pCi/L or higher. For a home sale, there is no Maine statute we publish here, but a radon test is a near-universal contingency in Maine purchase contracts, so plan on one at the closing table. If your test comes back high, we install a state-certified mitigation system, usually $900 to $6,000.