Why Harrison, Maine Has Elevated Radon Risk
Harrison has a significant seasonal and vacation property component, with hundreds of lakefront camps and converted seasonal homes on Long Lake and Crystal Lake. These properties often have crawlspaces, minimal foundations, or were built before modern air-sealing standards. Year-round residents with full basements on the town's inland roads also face radon exposure potential. Properties outside Harrison village center are typically on private wells.
- EPA Zone 2 — elevated radon potential throughout the county
- County average radon level: 2.7 pCi/L (EPA action level is 4.0 pCi/L)
- Approximately 1 in 5 homes in this zone test above the EPA action level
- Radon is the #2 cause of lung cancer in the U.S. — responsible for ~21,000 deaths per year
- Most homes can be effectively mitigated for $900–$1,500 with a professionally installed system
Housing and Foundation Types in Harrison
Harrison housing is a mix of year-round residential homes (capes, ranches, colonials) on inland roads, lakefront camps and cottages — many converted to year-round use — and a modest number of newer homes near Route 35. Crawlspaces and earthen-floor construction are common in older lakefront properties. The town's well water supply is standard for most properties outside the small village center.
Radon in Harrison Well Water
Many Harrison homes are on private wells. Radon dissolved in well water is released into indoor air when water is used — in showers, dishwashers, washing machines, and faucets. This contributes directly to indoor air radon levels and is an exposure pathway that many homeowners overlook entirely.
We recommend that any Harrison home on a private well be tested for water radon alongside air radon. If water levels are elevated, we install aeration treatment systems that remove radon before it enters your home's plumbing. Learn more: Radon in Well Water — How It Works and How to Fix It
Areas We Serve in Harrison, Maine
We serve all neighborhoods and roads throughout Harrison, including:
- Long Lake waterfront
- Crystal Lake area
- Harrison Village
- Route 35 corridor
- Route 117 corridor
- Bear Pond area
- North Harrison
- South Harrison / Norway line
Radon Mitigation Services in Harrison
- Sub-slab depressurization — gold-standard fix for basement and slab homes; effective for nearly all foundation types
- Crawlspace vapor barriers & sub-membrane depressurization — for homes with earthen or gravel crawlspace floors
- Well water radon treatment — aeration systems to remove radon before it enters your home's plumbing
- Foundation crack sealing — epoxy injection for block, poured concrete, and stone foundations
- Radon system maintenance & fan replacement — service for existing systems throughout the Cumberland County area
Radon Mitigation Cost in Harrison, Maine
Most Harrison homes can be mitigated for $900–$1,400 for air radon. Homes with crawlspaces, mixed foundation types, or older stone foundations may fall toward the higher end. Water radon treatment, if needed, is a separate system with its own quote. We provide itemized, no-surprise pricing before any work begins.
Learn more: Full radon mitigation cost guide for Maine homeowners
Our Process for Harrison 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.