Radon Gas Testing Services in Columbus, OH

Why Columbus and Franklin County Homes Face Elevated Radon Risk

Franklin County sits in EPA Radon Zone 1, the highest-risk designation for predicted indoor radon levels. The average recorded indoor radon level in Franklin County is approximately 7.47 pCi/L, well above the EPA action level of 4.0 pCi/L. Ohio's glacial deposits and underlying shale formations are naturally rich in uranium, which breaks down into radium and then into radon gas. That gas migrates upward through soil and enters homes through foundation cracks, gaps around utility pipes, sump basins, and crawl spaces.

Columbus neighborhoods built on glacially derived soils, including those in Clintonville, Gahanna, Whitehall, and Grove City, can carry heightened exposure risk. Homes with finished basements, older concrete-block foundations, or below-grade living spaces may allow more radon to accumulate. Because radon levels can vary significantly from one ZIP code to the next, individual testing remains the only dependable measure.

What Do Radon Gas Testing Services in Columbus, OH Involve?

Professional radon gas testing services involve placing a calibrated detection device inside the lowest livable area of your home, typically a basement or first floor. ProCheck Engineering uses continuous electronic monitors that record radon concentrations throughout the test period and provide tamper-resistant data. Two primary test types are available.

Short-Term Testing runs 48 hours to 90 days and is well suited for real estate transactions where results are needed quickly. The device is placed under closed-house conditions, meaning windows and doors remain shut during the measurement period.

Long-Term Testing runs more than 90 days and measures average radon exposure across seasonal changes, offering a more complete picture of year-round conditions.

Both test types follow Ohio Department of Health protocols. Results are reviewed against the EPA action level of 4.0 pCi/L. If levels meet or exceed that threshold, a mitigation system may be warranted.

How the Testing Process Works

1. Contact the team at (614) 841-0217 or use the contact form to schedule your appointment.
2. An inspector places a continuous electronic radon monitor in the lowest livable area under closed-house conditions.
3. The monitor records concentration data for the agreed duration, typically 48 hours for a short-term test.
4. Data are analyzed using professional-grade software against Ohio Department of Health standards.
5. You receive a written report with your results and, if levels are elevated, a recommended path forward.

Radon Testing for Real Estate Transactions

Radon gas testing services are a standard part of many Columbus-area home purchases. Buyers frequently schedule a radon test alongside a general home inspection to confirm safe indoor air quality before closing. Sellers who test proactively may find the process helps move a transaction forward with fewer delays. Ohio does not mandate radon testing for real estate sales, but lenders, buyers' agents, and real estate attorneys across Franklin County commonly recommend it. ProCheck Engineering can coordinate radon gas testing with a full property inspection to keep the due-diligence timeline on track.

Certified Professionals Serving Central Ohio Since 1997

ProCheck Engineering is an owner-operated company with inspectors licensed in the State of Ohio. The team adheres to Ohio Department of Health requirements for radon measurement protocols and uses continuous electronic monitors that deliver tamper-resistant results. Since 1997, the company has completed tens of thousands of inspections across Central Ohio. You can review individual inspector qualifications on the Our Team page before you book.

ProCheck Engineering, Inc. serves Columbus and surrounding communities including Westerville, Bexley, Gahanna, Worthington, Pickerington, Grove City, Dublin, Pataskala, and Groveport.