Kittery radon mitigation — local context
Kittery sits in York County, Maine's southwesternmost county (Britannica), at the mouth of the Piscataqua River opposite Portsmouth, NH — and the EPA maps York County as Radon Zone 1, its highest tier, where the predicted average indoor screening level is above 4 pCi/L (U.S. EPA, Map of Radon Zones). The Maine CDC reports that "at least 25% of the homes tested in any part of the state have radon problems," with an action level of 4 pCi/L. The reason runs deep: a 2014 study in Environmental Science & Technology (Yang et al.) found radon exceedances higher in southern and coastal Maine near granitic plutons, while the town-named Kittery Formation bedrock (USGS, unit MESZk) underlies the area. That's why we start with a radon test — $50, credited toward the job if you proceed — then mitigate. Radon mitigation runs $900–$6,000 (most jobs $1,950–$2,250). We're radon-certified (RMS-113966) and install sub-membrane depressurization for dirt and fieldstone crawl spaces. Start with a radon test.
What a recent customer said
Radon assessment went easy, install went easy, experienced and knowledgeable experts, radon levels dropped by next morning to well below EPA action levels. Great work!
Frequently asked questions
Is Kittery, Maine a high-radon area?
Yes. The EPA classifies York County — where Kittery sits — as Radon Zone 1, its highest-potential category, meaning the predicted average indoor radon screening level is above the 4 pCi/L action level (U.S. EPA, Map of Radon Zones). Statewide, the Maine CDC reports at least 25% of homes tested in any part of the state have a radon problem. Coastal southern Maine, where Kittery lies near granitic bedrock, sees elevated levels driven by uranium decay (Yang et al., Environmental Science & Technology, 2014).
How much does radon mitigation cost in Kittery?
603 Basement Solutions prices radon mitigation at $900–$6,000, with most jobs landing between $1,950 and $2,250. We start with a radon test for $50, which is credited toward the job if you decide to proceed — so the test cost comes off the mitigation price. Maine's action level is 4 pCi/L (Maine CDC), so testing first tells us exactly what your home needs.
Can you mitigate radon in a fieldstone or dirt crawl space in an old Kittery home?
Yes. For dirt-floor and fieldstone crawl spaces common in older New England homes, we install sub-membrane depressurization — a sealed vapor barrier over the soil with a fan that draws radon-laden air from beneath it and vents it safely outside. 603 is radon-certified (RMS-113966) and specializes in old and historic homes, so we're set up for the kind of foundations Kittery's housing stock includes.