Harrisburg, PA
Radon Testing & Mitigation
Radon testing and mitigation for homes throughout Harrisburg and Dauphin County. Pennsylvania has one of the highest concentrations of elevated- radon-potential counties in the country, and Dauphin County's mix of limestone and dolomite bedrock beneath the Susquehanna Valley floor, shale and sandstone ridges, and older basement-heavy housing stock means radon is a real, testable concern here — not a hypothetical one. We connect you with a sub-slab depressurization system sized correctly for your home's foundation, installed to bring radon below the EPA's 4.0 pCi/L action level.
Most Dauphin County radon mitigation systems run $900–$2,300, with a standard single-family basement home typically landing around $1,000–$1,500.
Why It's Worth Doing
Peace of mind
Know your home's actual radon level instead of guessing based on age or location alone.
Reduce long-term health risk
The EPA and Surgeon General identify radon as the second leading cause of lung cancer in the U.S., after smoking.
Protect a home sale
Pennsylvania sellers must disclose prior test results — testing ahead of listing avoids surprises during the inspection period.
Confirmed results
Post-installation testing confirms your system actually brought levels below the EPA action level, in writing.
How We Do It
- 1
Test
Short-term (48–96 hour) or long-term (90+ day) testing to establish your home's actual radon level against the EPA's 4.0 pCi/L action level.
- 2
Design
If mitigation is needed, a system is designed around your specific foundation type, slab layout, and basement configuration.
- 3
Install
Sub-slab depressurization system installed — sealed piping and a fan draw radon from beneath the slab and vent it safely above the roofline.
- 4
Confirm
Post-installation testing verifies the system brought levels below the EPA action level, with retesting recommended every two years.
Common Questions
How much does radon mitigation cost in Harrisburg, PA?
Most Dauphin County radon mitigation systems cost $900–$2,300, with a standard single-family home with a basement typically running $1,000–$1,500 for a sub-slab depressurization system. More complex foundations, multiple systems, or difficult access can increase cost.
Does Dauphin County actually have a radon problem?
Dauphin County is rated EPA Zone 1 — the highest radon potential rating on the EPA's official Map of Radon Zones — driven by limestone, dolomite, and shale bedrock beneath the Susquehanna Valley. That doesn't mean every home has high levels — it means testing is genuinely worthwhile here rather than a formality, since results vary significantly from house to house even nearby.
What EPA radon zone is Dauphin County in?
Dauphin County is rated EPA Zone 1 on the agency's official Map of Radon Zones — the highest of the EPA's three radon potential zones, meaning the county's predicted average indoor screening level is above 4 pCi/L, the same level the EPA recommends fixing a home at. A Zone 1 rating reflects a county-wide prediction based on geology, soil, and existing test data, not a guarantee about any specific house — testing your own home is still the only way to know its actual radon level.
Get a free radon testing quote for your Dauphin County home
Fast scheduling, clear pricing, and results measured against the EPA action level.