Certified Radon Testing • Portland Metro
Know Your Home's Radon Level Before You Buy.
MCC Inspections provides professional 48-hour continuous electronic radon testing throughout Portland, Beaverton, Hillsboro, Tigard, Lake Oswego and surrounding Oregon communities. Fast, accurate EPA-protocol testing with easy-to-understand reports.
Understanding Radon
What Is Radon Gas?
Radon is a naturally occurring radioactive gas created as uranium breaks down in soil and rock. It has no color, smell, or taste, making professional testing the only reliable way to determine whether elevated levels exist inside your home.
Invisible but Measurable
Because radon cannot be seen or smelled, electronic monitoring is the only dependable way to determine indoor concentrations.
How It Enters Homes
Radon moves through cracks in foundations, crawl spaces, construction joints, sump pits and utility penetrations before becoming trapped inside the home.
EPA Action Level
The EPA recommends considering radon mitigation when average levels measure 4.0 pCi/L or higher.
Why Test?
Every Home Should Be Tested.
High radon levels have been found in both old and new homes, homes with basements, crawl spaces, and slab foundations. The only way to know your home's radon level is through professional testing.
Buying a Home
Avoid unexpected environmental concerns before closing by testing during your inspection contingency.
Selling a Home
Testing before listing can eliminate surprises during buyer negotiations and speed up the transaction.
Current Homeowners
Radon levels can change over time due to weather, foundation movement and remodeling projects.
Peace of Mind
Receive an accurate electronic report with hourly readings, tamper detection and an easy-to-understand summary.
Our Process
Professional 48-Hour Continuous Monitoring
We use professional Continuous Radon Monitors (CRM) that comply with EPA testing protocols. The monitor records hourly radon levels, detects tampering, and produces a detailed electronic report at the conclusion of the test.
How Your Test Works
The monitor is placed in the lowest livable area of the home where it continuously measures radon concentrations for a minimum of 48 hours. During the testing period, closed-house conditions are maintained to ensure accurate results.
✔ Hourly Readings✔ Tamper Detection
✔ Electronic Report
✔ EPA Protocol
Why Electronic Monitoring?
Continuous Radon Monitoring Is More Accurate Than Charcoal Test Kits.
Professional electronic monitors record hourly fluctuations, identify environmental changes, and include tamper detection. This provides significantly more information than passive charcoal kits commonly purchased online.
Sample Report
Easy-to-Understand Results.
Every radon inspection includes a detailed electronic report with hourly measurements, average radon concentration, testing conditions, and EPA recommendations.
Hourly Readings
View every hourly measurement collected during the test.
Average Results
See the overall radon concentration expressed in pCi/L.
EPA Guidance
Understand whether mitigation should be considered based on EPA action levels.
Frequently Asked Questions
Radon Testing Questions
How long does the test take?
Professional radon testing requires a minimum of 48 hours using a continuous electronic monitor.
Is radon common in Oregon?
Yes. Elevated radon levels are found throughout Portland and many communities across the Willamette Valley.
What level is considered high?
The EPA recommends considering mitigation when average radon levels reach 4.0 pCi/L or higher.
Can every home have radon?
Yes. New homes, older homes, homes with basements, crawl spaces, and slab foundations can all have elevated radon levels.
Google Reviews
Trusted by Home Buyers Throughout Portland.
Clear communication, detailed reports, and professional service have made MCC Inspections one of the highest-rated inspection companies in the Portland metro area.
Service Areas
Serving Portland and surrounding communities.
Professional home inspection, sewer scope, and radon testing services are available throughout the region.
Schedule Your Test
Protect Your Family With Professional Radon Testing.
Whether you're buying, selling, or simply want peace of mind, MCC Inspections provides certified 48-hour electronic radon testing throughout the Portland metro area.