Why Casco, Maine Has Elevated Radon Risk
Casco's housing stock is heavily weighted toward lakefront properties — some year-round, many converted from seasonal use. There are also rural residential neighborhoods inland on Route 302 and back roads toward Poland and Otisfield. Homes on private wells should test for water radon in addition to air. Older homes with stone or block foundations are the most common radon entry challenge in Casco.
- EPA Zone 1 — highest radon potential in the country
- County average radon level: 2.8 pCi/L (EPA action level is 4.0 pCi/L)
- Approximately 1 in 4 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 Casco
Casco homes range from lakefront camps and cottages on Sebago Lake and Panther Pond, to mid-century ranches and capes on inland roads, to newer construction in the Route 302 corridor. Many lakefront properties were seasonally used and have minimal foundation sealing. Private wells are nearly universal outside the immediate lake-shore zones. Sub-slab depressurization is effective for the vast majority of Casco foundation types.
Radon in Casco Well Water
Many Casco 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 Casco 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 Casco, Maine
We serve all neighborhoods and roads throughout Casco, including:
- Sebago Lake shoreline
- Panther Pond area
- Pleasant Lake area
- Thomas Pond neighborhood
- Route 302 corridor
- North Casco
- Quaker Ridge Road area
- South Casco
Radon Services Across the Cumberland Region
We serve Casco as part of a concentrated service cluster throughout western Maine. If you have neighbors, family, or a second property in the area, we cover the surrounding towns with the same NRPP-certified technicians and same-week scheduling:
Radon Mitigation Services in Casco
- 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 Casco, Maine
Most Casco 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 Casco 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.