Independent Pennsylvania radon resource

High Radon Test Result in Pennsylvania?

Understand what your result means, compare mitigation options and planning costs, review Pennsylvania requirements, and request quotes from radon professionals.

Understand My Radon Result Request Mitigation Quotes

We publish guidance and route quote requests. We do not test or install systems.

Radon gas forms in soil and can move into a building through slab cracks, control joints, utility penetrations, sump openings and exposed crawl space soil. Pressure differences between the building and the soil draw soil gas indoors.

What was your radon result?

These ranges are interface groupings used to point you to the right guidance. They are not official EPA or Pennsylvania risk categories.

Radon Result Interpreter

Enter the number from your radon test report. This tool explains how that number relates to published EPA action guidance. It does not estimate personal health risk and does not replace an assessment of your specific building.

What an elevated radon result means

Radon is a naturally occurring gas produced by the decay of uranium in soil and rock. It moves with soil gas and can accumulate indoors. A single number from a test is a measurement of one building over one period — not a statement about your street, your ZIP code or your health.

Federal guidance frames the decision in two steps: fix the home at 4 pCi/L or higher, and consider fixing it between 2 and 4 pCi/L. Those numbers describe when action is recommended for the building. They are not thresholds where something happens suddenly, and they are not a personal diagnosis.

Radon levels in one home can differ substantially from the home next door, because the result depends on the specific foundation, soil beneath it, construction details and how the building is operated.

Source: US EPA — A Citizen's Guide to Radon · United States · guidance · Last verified: verification date not recorded

What happens after a high result

Most homeowners follow a recognizable sequence rather than jumping straight to installation.

The decision path most homeowners follow: test, interpret the result against published guidance, evaluate mitigation with a certified professional where appropriate, then test again after the system is installed.

Confirm what kind of test produced the number, and where it was placed.
Decide with a certified professional whether a follow-up test is appropriate before mitigation, based on the result and how the test was conducted.
Have the building evaluated — foundation type largely determines system design.
Compare quotes from professionals certified in Pennsylvania.
Test again after installation to document the outcome.

See the full next-step guide.

How radon mitigation works

Most residential systems use active soil depressurization: a fan creates lower pressure beneath the foundation than inside the home, so soil gas is collected and vented outside instead of being drawn indoors.

An active sub-slab depressurization system uses a fan to draw soil gas from beneath the slab and route it through sealed piping to an exhaust point outside, above the roofline, before it can enter the building.

A system is a set of connected parts — suction point, sealed piping, fan, a monitoring device, and an exhaust point. Suitability and placement depend on the building, which is why sealing alone is treated as a supporting measure rather than a solution.

How radon mitigation works · Compare system types

Basement, crawl space and sump systems

Basement systems

Slab suction points, interior or exterior routing, and how finished space affects the install.

Crawl space systems

Sub-membrane depressurization over exposed soil — a materially different scope from a slab.

Sump pit systems

When a sump connected to drain tile can serve as a suction point, and what a sealed cover must not compromise.

Passive system activation

Homes built with radon-resistant piping may be candidates for conversion to an active system.

Existing system not working

Elevated post-mitigation readings, a stopped fan or a changed gauge reading.

Commercial and multifamily

Apartment buildings and commercial properties fall under different standards than single-family homes.

What mitigation costs

There is no single Pennsylvania price. Cost tracks scope: foundation type, number of suction zones, home size, routing, electrical work and whether piping already exists.

Cost driver	Why it moves the quote
Foundation type	Crawl space membrane work and mixed foundations add material and labor.
Number of suction zones	Separate foundation areas can require separate suction points.
Existing piping	Passive piping may reduce scope if a professional confirms it is usable.
Routing and access	Interior routing through finished space differs from an exterior run.
Electrical	A fan needs a suitable circuit, installed to code.

Full cost breakdown and planning calculator

Source: US EPA — Consumer's Guide to Radon Reduction · United States · cost-reference · Last verified: verification date not recorded

Pennsylvania certification

Pennsylvania runs a certification program for radon services. Before hiring, check the person or firm against the official DEP listing rather than a badge on a website.

Certification is generally required for persons and firms performing radon testing, mitigation or laboratory services for others, subject to the exemptions in Pennsylvania's Act and regulations. Verify the current requirements and the current certification status directly with DEP.

How to verify a Pennsylvania radon professional

Source: Pennsylvania DEP — Certified Radon Service Providers · Pennsylvania · directory · Last verified: verification date not recorded

Pennsylvania radon data

Pennsylvania DEP publishes summaries of radon test results reported by certified testers. That data describes reported tests — it cannot predict the level in any individual home.

Explore the Pennsylvania radon data hub

Buying or selling a home

Radon shows up in transactions on a clock. Knowing the sequence — test, evaluate, quote, negotiate, retest — keeps the decision from being made under time pressure.

Radon in a real-estate transaction

South Central Pennsylvania coverage

Our current launch area is South Central Pennsylvania. Each county page collects local context, testing guidance and the workflow after an elevated result.

Dauphin County

Harrisburg and surrounding communities.

Cumberland County

Mechanicsburg, Camp Hill and Carlisle areas.

York County

York and the surrounding southern tier.

Lebanon County

Lebanon and the surrounding valley.

How quote matching works

You describe the property and the result; we pass the request to independent radon professionals. We are not a contractor and we do not mark up their work.

Step	What happens
1. You submit details	Result, foundation, existing system, project type and ZIP code.
2. Request is recorded	Your details form a structured project record.
3. Routing	Contractor routing must be connected before live lead distribution.
4. You verify	Check any professional against the official Pennsylvania DEP list before hiring.

Frequently asked questions

Is 4 pCi/L a safety line?

It is the level at which EPA guidance recommends fixing the home. EPA also notes there is no level of radon considered risk-free, which is why the 2–4 range carries a 'consider fixing' recommendation.

Should I retest before mitigating?

It depends on the result, the test type and the circumstances. A short-term test in particular is a snapshot. See testing guidance and confirm the appropriate follow-up with a certified professional.

Do you install radon systems?

No. This is an independent information and quote-request platform. Installation is performed by certified professionals you choose and hire directly.

Can I use my ZIP code's data to predict my home's level?

No. Historical radon test data for a ZIP code or county cannot predict the radon level in an individual home. Testing the property is the only way to know.

Does a system guarantee a specific final number?

No responsible professional guarantees an exact final reading. A post-mitigation test is what documents the actual outcome in your home.

Request radon mitigation quotes

Share your test result, foundation type and project details. We pass your request to independent radon professionals — we do not perform the work ourselves.

Request Quotes