Pennsylvania Radon Levels by County
Pennsylvania has one of the most serious radon problems in the United States. According to the Pennsylvania Department of Environmental Protection, approximately 40% of homes in Pennsylvania have radon levels above the EPA's action guideline of 4 pCi/L.
The EPA recommends homes and properties be mitigated if the level of radon is above 4 pCi/L. All six counties we serve are classified as EPA Zone 1 - the highest potential for elevated radon levels.
⚠️ Pennsylvania State Average: 8.6 pCi/L
Pennsylvania's average radon level of 8.6 pCi/L is more than double the EPA's action level of 4.0 pCi/L, and significantly exceeds the World Health Organization's recommended threshold of 2.7 pCi/L.
Armstrong County
Armstrong County consistently shows radon levels nearly double the EPA action level, with an average of 7.8 pCi/L in residential properties.
Butler County
Butler County has some of the highest radon levels in Pennsylvania, with an average of 8.5 pCi/L in residential properties.
Cambria County
Cambria County faces severe radon challenges with an average of 9.1 pCi/L—more than double the EPA threshold.
Fayette County
Fayette County shows consistently high radon concentrations averaging 8.2 pCi/L in residential properties.
Somerset County
Somerset County has some of the most elevated radon levels in Western Pennsylvania, with averages reaching 10.3 pCi/L—nearly triple the EPA's recommended action level.
Westmoreland County
Westmoreland County demonstrates significant radon exposure risk with an average of 7.6 pCi/L in residential properties.
Understanding EPA Radon Zones
Zone 1 (Highest Potential): Counties with predicted average indoor radon screening levels greater than 4 pCi/L
Zone 2 (Moderate Potential): Counties with predicted average indoor radon screening levels between 2 and 4 pCi/L
Zone 3 (Low Potential): Counties with predicted average indoor radon screening levels less than 2 pCi/L
Important: The EPA Map of Radon Zones are general guidelines. Radon levels can vary dramatically from home to home, even within the same neighborhood.
Our Radon Mitigation Techniques
Proven, EPA-approved methods to protect your home and family from radon exposure. Every installation is customized to your property's unique characteristics.
Sub-Slab Depressurization
85-99% reductionThe most effective and common method for reducing radon levels in homes with basements or slab-on-grade foundations.
This system creates negative pressure beneath the foundation, drawing radon gas from the soil before it enters your home. A PVC pipe is inserted through the foundation slab into the soil, connected to a specialized fan that vents the radon safely above the roofline.
Radon Mitigation Fan Systems
Critical componentSpecialized, quiet fans designed specifically for continuous radon mitigation with minimal energy consumption.
We install high-quality, locally manufactured radon fans that are built to run 24/7. These fans are mounted on exterior walls or in attics and are designed for durability and long-term performance. Each system includes a manometer to monitor proper operation.
Crawlspace Vapor Barriers
Up to 90% reductionHeavy-duty polyethylene sheeting that prevents radon gas from entering through exposed soil in crawlspaces.
Professional-grade 6-mil or thicker polyethylene sheeting is laid over exposed soil and sealed at all seams and penetrations. Combined with proper ventilation or depressurization, this prevents radon entry through the crawlspace floor.
Foundation Sealing & Crack Repair
Supplementary measureProfessional sealing of cracks, joints, and openings in the foundation to reduce radon entry points.
While sealing alone is not sufficient to solve radon problems, it's an important supplementary technique. We use professional-grade sealants to close foundation cracks, gaps around utility penetrations, and construction joints, enhancing the effectiveness of active mitigation systems.
Custom Solutions for Western Pennsylvania Homes
Every home is different, and there's no one-size-fits-all solution for radon mitigation. We design custom systems based on your foundation type, soil conditions, and specific property characteristics. Our installations use locally manufactured fans, ensuring long-lasting performance and reliability.
All our systems meet or exceed EPA and ANSI/AARST standards. We provide complete documentation to ensure your system's effectiveness and your family's safety.
Protect your family with a professional radon mitigation system.
Get Your Free Estimate