Professional Radon Testing for Ohio Homes
Accurate, EPA-approved radon testing using certified continuous radon monitors. Know your home’s radon level in as little as 48 hours — and get a clear, actionable report from a licensed Ohio professional.
Radon Testing in Ohio
The only way to know your home’s radon level is to measure it. Radon has no color, odor, or taste — completely undetectable without equipment. Carl uses professional continuous radon monitors (CRM), not charcoal kits, for precise, tamper-resistant results that meet all EPA and NRPP protocols.
Ohio is EPA Zone 1 — the highest risk classification — and roughly 1 in 3 homes tests at or above 4.0 pCi/L. Testing an apartment community for a HUD, Fannie Mae, or Freddie Mac loan? See multifamily radon testing. Carl provides testing for homeowners, buyers, sellers, and post-mitigation verification across Central and Southwest Ohio.
WHAT’S INCLUDED
- Licensed & NRPP-certified technician on-site
- Professional CRM placement in lowest livable area
- Minimum 48-hour continuous monitoring
- Tamper-resistant, EPA-compliant testing
- Detailed written results report
- Clear risk interpretation & next-step guidance
- Post-mitigation verification testing
- Real estate transaction testing with expedited results
Related reading
- How Radon Mitigation WorksUnderstand your options if your test comes back elevated.
- Real Estate Radon TestingExpedited testing for buyers, sellers, and agents.
- New Construction RadonWhy new Ohio homes still need post-construction testing.
- Commercial Radon TestingMulti-point testing protocols for businesses and buildings.
- Continuous Radon Monitors — How They WorkWhy CRM testing is more accurate than charcoal kits.
- Understanding Your ResultsWhat pCi/L levels mean and what to do next.
- About Carl Woolwine — ODH #RS579Carl’s credentials and three decades inside Ohio homes.
Our Radon Testing Process
Transparent, professional, and designed around your family — not around our schedule.
Schedule
Call or fill out our online form. We confirm your appointment — often within 24 hours, including real estate timelines.
Deploy Monitor
Carl places a calibrated CRM in the lowest livable area of your home. The monitor records radon levels hourly for a minimum of 48 hours.
Closed Building
Keep exterior windows and doors closed during testing (normal entry and exit is fine). HVAC can run normally on recirculating mode.
Results & Report
You receive a written report with your average radon level, EPA risk context, and clear next steps. If mitigation is needed, Carl walks you through options at no charge.
Questions we hear from Ohio homeowners every day
We believe informed homeowners make better decisions. Here are honest, plain-English answers to the most common radon questions.
Still have questions?
We love talking to homeowners. No scripts, no sales pressure.
Read the full Ohio Radon Guide →
Sources: U.S. EPA — Radon · Ohio Dept. of Health Radon Program
What is a continuous radon monitor (CRM) and why is it better than a kit?
A CRM records radon concentrations hourly, producing a complete tamper-evident data log. Charcoal kits give only a single average with no transparency into test conditions. CRM testing is the professional standard and required for most Ohio real estate transactions.
How do I prepare my home for a radon test?
Keep all exterior windows and doors closed for 12 hours before and throughout the test. Normal HVAC operation on recirculating mode is fine. Don’t run exhaust fans to the outside. We’ll provide a full checklist when you schedule.
What does my radon test result mean?
Results are in picocuries per liter (pCi/L). The EPA recommends action at 4.0 pCi/L or above. Levels from 2.0–4.0 pCi/L are moderate risk — worth considering mitigation. Below 2.0 pCi/L is generally acceptable, though no radon level is completely without risk.
Should I test my home even if it’s a newer build?
Yes. Radon levels are determined by geology beneath the home, not its age. Many Ohio new builds with code-required RRNC features still test above 4.0 pCi/L. Zone 1 geology produces enough pressure to overcome passive construction measures in many cases.
How often should I test for radon?
The EPA recommends testing every two years, or after any major renovation affecting the foundation. Always retest after mitigation is installed. Annual system checks are recommended for homes with existing mitigation fans.
What if I already have a radon system installed in my home?
A mitigation system reduces radon but must be verified through post-mitigation testing. Fans wear out over time. If you’re buying a home with an existing system, always test before closing — don’t assume it’s still working.
Is radon testing required when selling a home in Ohio?
Ohio law doesn’t require it, but testing has become the standard expectation in Central and Southwest Ohio transactions. Sellers who proactively test and mitigate avoid delays at closing and often command stronger offers.
Explore more
Every service we offer, and every community we serve, is connected to one mission: protecting Ohio families from radon.
RELATED SERVICES
Radon Mitigation
If your test reveals elevated levels, Carl designs and installs a custom mitigation system — guaranteed to reduce levels below 4.0 pCi/L.
Real Estate Radon Testing
Expedited 48-hour testing for buyers, sellers, and agents. Results within your inspection window, documentation that satisfies lenders.
New Construction Radon
Building or buying new? Post-construction baseline testing is the only way to confirm passive RRNC features are actually working.
SERVICE NEAR YOU
Radon Testing in Columbus, OH
~40% of Franklin County homes test above the EPA limit. Fast scheduling across the Columbus metro.
Radon Testing in Dayton, OH
The Miami Valley has some of Ohio’s highest radon readings — ~45% of Montgomery County homes exceed 4.0 pCi/L.
Radon Testing in Cincinnati, OH
Hamilton, Warren, and Butler counties sit on ancient radon-producing limestone. ~35% of Cincinnati-area homes test high.
Ready to get started?
We respond within 24 hours. No pressure, no jargon — just honest guidance from Ohio’s radon experts.
Mon–Fri 8am–6pm · Sat 9am–2pm