Harrisburg, PA
Sub-Slab Depressurization (ASD) System Installation
Active sub-slab depressurization is the standard, most effective radon reduction method for the basement-heavy housing stock common across Harrisburg and Dauphin County. A sealed pipe and fan system draws radon gas from beneath the foundation slab and vents it safely above the roofline before it can enter your living space — addressing the source rather than just the symptom.
What's Included
- The EPA-recommended standard for active radon reduction
- Designed around your home's specific foundation and slab layout
- Quiet, continuous operation with a visible pressure gauge to confirm it's working
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.