What Is Radon?
Radon is a naturally occurring radioactive gas that comes from the soil. It is colorless, odorless, and tasteless, meaning you cannot detect it without proper equipment.
- Outdoors, radon is usually harmless.
- Indoors, it can accumulate to levels that increase long-term health risks.
The only way to know your home’s radon level is to test.
Why Radon Matters
- Radon exposure is the second leading cause of lung cancer in the U.S.
- It is the leading cause of lung cancer among non-smokers.
- Radon does not cause immediate symptoms, which is why routine testing is essential.
Any home can have elevated radon, new or old, big or small, with or without a basement.
Where Radon Comes From
Radon is produced naturally as uranium in the soil breaks down. It moves upward and can enter a home through openings in the foundation.
Common entry points include:
- Cracks in the foundation
- Gaps around plumbing and utility penetrations
- Sump pumps and drain systems
- Crawlspaces
- Construction joints
How Radon Testing Works
There is no way to sense radon with your body. Testing is the only reliable method. On Par Inspections uses professional-grade continuous radon monitors for accurate measurements.
Types of testing:
- Short-term testing (2–7 days) – Quick screenings and real estate transactions
- Long-term testing (90+ days) – Provides a better picture of year-round exposure
- Professional testing – Calibrated equipment with clear written reports
What Is a “High” Radon Level?
Radon is measured in picocuries per liter (pCi/L):
- 4.0 pCi/L or higher → Mitigation is strongly recommended
- 2.0–4.0 pCi/L → Consider lowering radon levels for better long-term safety
- Below 2.0 pCi/L → Typically considered low risk
Mitigation: What If Your Radon Levels Are High?
Radon issues are fixable. A licensed radon mitigation contractor can design and install a system to lower radon levels in your home.
Most systems include:
- Sealing major radon entry points where practical
- Installing a vent pipe from beneath the slab or crawlspace to above the roofline
- Adding a continuously running fan to pull radon from under the home and exhaust it outside
Follow-up testing ensures the system is working properly.
Radon in Southeast Michigan
Many areas in Southeast Michigan have elevated radon potential due to local soil conditions. Radon levels can vary widely from one home to the next, even between neighbors.
The safest approach: Every home should be tested, whether you are buying, selling, or have lived there for years.
Why Test with On Par Inspections?
We provide radon testing that is:
- Performed with professional-grade, calibrated equipment
- Delivered with clear, easy-to-read reports
- Completed with fast turnaround times
- Backed by local Southeast Michigan experience