Why Hallowell, Maine Has Elevated Radon Levels
Hallowell sits squarely in EPA Radon Zone 1 — the highest-risk designation in the country. The geology beneath Kennebec County is dominated by granite and uranium-bearing bedrock, the primary source of radon gas. As uranium naturally decays, it produces radon that migrates upward through soil and enters homes through foundation cracks, sump pits, floor drains, and gaps around pipes.
- Average indoor radon: ~4.2 pCi/L (above the EPA action level of 4.0 pCi/L)
- Approximately 1 in 3 Kennebec County homes tests above 4 pCi/L
- EPA Zone 1 designation — highest radon potential in the country
- Radon is the #2 cause of lung cancer in the U.S. after smoking
- The EPA estimates 21,000 lung cancer deaths per year are attributable to radon exposure
Hallowell's compact geography and varied terrain — from the Kennebec River waterfront up to the hilltop neighborhoods — means radon levels can vary significantly from street to street and even home to home. The only way to know your home's radon level is to test it.
Radon in Hallowell's Historic Homes
Hallowell is famous for its stunning historic architecture. Water Street, Second Street, and the renowned row houses represent some of Maine's finest 19th-century residential construction. But older construction also means older foundations — and older foundations are often more susceptible to radon entry.
Most Hallowell homes were built between 1850 and 1980. Older construction often features stone or brick foundations, crawlspaces, and basement floor drains that can be radon entry points. Kennebec County granite bedrock sits close to the surface throughout Hallowell, making radon a consistent concern regardless of home age.
Our technicians have extensive experience working with historic Hallowell properties. We design mitigation systems that are fully effective while minimizing visible disruption to historic facades, architectural details, and interior finishes. We understand how much these homes mean to their owners and to the community — and we treat every installation with that in mind.
Hallowell Neighborhoods We Serve
We provide radon testing and mitigation services throughout every part of Hallowell, including:
- Water Street — Historic commercial and residential corridor
- Second Street — Stately period homes and residential blocks
- Winthrop Street — Hilltop neighborhood overlooking downtown
- Lincoln Street — Mid-city residential neighborhood
- Green Street — Upper residential area
- Middle Street — Central city blocks
- Route 201 Corridor — South Hallowell and transition to Farmingdale
- Hilltop neighborhoods — Properties climbing above downtown Hallowell
Radon can be high anywhere in Hallowell. Distance from the river, elevation, or neighborhood age does not guarantee lower or higher levels — only a proper test will tell you where your home stands.
Our Radon Mitigation Services in Hallowell, ME
At Central Maine Radon & Water Mitigation, we offer a full range of radon mitigation services tailored to Hallowell homes:
- Sub-slab depressurization — the gold-standard fix for slab and basement homes, reducing radon by 85–95%
- Crawlspace vapor barriers & sub-membrane depressurization — for homes with dirt or partial crawlspaces common in Hallowell's older housing stock
- Water radon treatment — aeration systems for Hallowell homes on private wells with radon in their water supply
- Foundation crack sealing — epoxy injection to seal radon entry points in Hallowell's stone and poured concrete foundations
- System maintenance & fan replacement — ongoing service for existing mitigation systems throughout Hallowell
- Pre-sale radon mitigation — fast turnaround for Hallowell homeowners preparing to list their property
Radon Mitigation Cost in Hallowell, Maine
Most Hallowell homes can be mitigated for $900–$1,400, depending on foundation type, home size, and system complexity. Historic homes with stone or brick foundations, or properties with multiple foundation types (e.g., part basement, part crawlspace), may require additional work. We provide honest, itemized quotes with no hidden fees.
- Professional assessment of your Hallowell home's foundation and radon entry points
- Installation of a sub-slab or sub-membrane depressurization system
- Interior or exterior pipe routing (your preference)
- Radon fan installation with electrical connection
- Post-mitigation radon test to verify results below 4 pCi/L
- Written documentation for home sales and records
Learn more: What does radon mitigation cost in Maine?
Our Process for Hallowell Homeowners
Contact & Consultation
Call us or request a quote online. We'll discuss your situation and schedule a convenient time for assessment.
Home Assessment
Our certified technician evaluates your home, testing radon levels and determining the best mitigation approach.
System Design
We design a custom mitigation system based on your home's construction, layout, and specific radon challenges.
Professional Installation
Our experienced team installs your system, typically completing the work in a single day.
Verification & Support
We verify system performance and provide ongoing support to ensure continued protection for your family.