What is Radon?
Radon is an odorless, invisible radioactive gas that can enter homes from the soil. Pennsylvania has one of the most serious radon problems in the U.S.—about 40% of tested homes exceed the EPA action level. Testing is the only way to know your level. This service is included in our Property Health Inspection package.
High Radon Risk in Pennsylvania
Radon forms naturally from uranium in rock and soil and can accumulate indoors. In Pennsylvania, geology and housing characteristics make elevated levels common; ~40% of homes tested are above 4.0 pCi/L (the EPA’s action level).
How Our Testing Works:
48-Hour Continuous Monitor
We use Continuous Radon Monitors (CRMs) for short-term testing, following NRPP/AARST measurement practices.
Schedule
Schedule your test with Keystone Castle Inspections.
Setup
Device placement in the lowest livable area per protocol.
Analysis
Pickup & analysis with quality controls and calibration schedule.
Prep
Closed-house conditions 12 hours before and during test​.
Monitoring
48-hour monitoring with hourly readings.
Results
After 48-hour test, same/next-day results with clear guidance.
Pittsburgh & Western PA Radon Testing
Ready to test? Schedule now to pick a time that works for you. Serving Greater Pittsburgh and Western PA, including Allegheny, Butler, Beaver, Westmoreland, Washington, Armstrong, and Indiana counties (and nearby communities such as Pittsburgh, Cranberry Township, Wexford).
How long does the test take?
Most tests run about 48 hours using a continuous radon monitor.
Do I need to leave the home?
No. Just maintain closed-house conditions (windows closed; normal entry/exit).
Is radon only a basement issue?
No. Radon can accumulate on any level; we test the lowest livable area first.
What if my result is high?
At ≥ 4.0 pCi/L, EPA recommends mitigation. We’ll explain next steps and retesting.
How often should I retest?
Every 2 years, after major renovations, or after installing a mitigation system.