Radon Mitigation in Johnstown
High radon risk driven by the Pennsylvanian Coal Measures of the Appalachian Plateau. Johnstown's valley-floor neighborhoods sit above shale, sandstone, and coal seams with trace uranium enrichment typical of the Allegheny Group, while hillside homes above former mines contend with abandoned-mine soil gas migration. The city's older housing stock, steep topography, and pronounced wintertime stack effect combine to produce consistently elevated basement radon readings across Cambria County.
Moderate Radon Risk Area
Johnstown is in EPA Zone 2 — High radon risk driven by the Pennsylvanian Coal Measures of the Appalachian Plateau. Johnstown's valley-floor neighborhoods sit above shale, sandstone, and coal seams with trace uranium enrichment typical of the Allegheny Group, while hillside homes above former mines contend with abandoned-mine soil gas migration. The city's older housing stock, steep topography, and pronounced wintertime stack effect combine to produce consistently elevated basement radon readings across Cambria County.
Local Geology & Risk Factors
Johnstown is located in an area with Appalachian Plateau / Pennsylvanian Coal Measures geology, which contributes to elevated radon levels. The Pennsylvania DEP identifies this region as having significant radon potential due to uranium-bearing rock formations.
Testing is essential because radon levels can vary significantly between neighboring homes based on construction, soil permeability, and ventilation.
See Pennsylvania radon levels and EPA radon zone classifications →
Quick Facts
Basement, Slab, Crawlspace installations available
Most systems installed in 1-2 days
5-10 year warranties on parts and labor
99% effectiveness in reducing radon
Why Choose Certified Pros?
- DEP-certified and insured
- Proper system design and installation
- Post-installation testing included
- Meet all DEP requirements
Verify Contractor Certification — PA DEP Official Directory for Johnstown, Cambria County
View PA DEP Certified Contractor DirectoryThe PA Department of Environmental Protection maintains the official list of certified radon testers and mitigators, sorted by county and updated monthly. Always verify certification before hiring any contractor.
Directory resource provided by PA DEP Bureau of Radiation Protection, Radon Division.
Request Radon Information for Johnstown
Submit your request and we will connect you with a DEP-certified professional serving Cambria County.
DEP-Certified Pros in Johnstown
Find a DEP-Certified Contractor in Johnstown
PA DEP maintains the official directory of certified radon testers and mitigators, updated monthly. Always verify certification before hiring.
Search the PA DEP Directory →PA Radon Testing Requirements
Under PA Code § 240, all radon testing and mitigation professionals operating in Pennsylvania must hold active DEP certification. Request your contractor's certification number and verify it independently before work begins.
PA DEP Radon Division →EPA Action Level: 4 pCi/L
The EPA recommends mitigation for any home testing at or above 4 pCi/L. Johnstown area homes with Appalachian Plateau / Pennsylvanian Coal Measures geology are at elevated risk. Short-term tests take 48–96 hours; long-term tests run 90 days for greater accuracy.
Pennsylvania Radon Risk Guide →Pennsylvania Radon Guides
Share Your Radon Test Result
Help other Johnstown homeowners understand local radon risk. Your anonymous reading contributes to our community dataset.
Readings are anonymous and used for informational purposes only. We do not store personal information from this form.
Not ready to submit? You can also go directly to the PA DEP directory.
Search the PA DEP Certified Contractor Directory →