Closing on a home comes with a long checklist, and it’s easy to focus on what you can see.
Radon usually isn’t on that list, mainly because there are no obvious signs to point you toward it.
In Ohio, though, it’s something buyers shouldn’t skip. The EPA has identified much of the state, including central Ohio, as a higher-risk area for elevated radon levels.
That’s why testing is often recommended before closing.
In this blog, we’ll go over why radon testing matters in Columbus, when to schedule it, and what your results actually mean for your purchase.
What Is Radon
Radon is a naturally occurring radioactive gas that comes from the breakdown of uranium in the ground. It’s colorless, odorless, and tasteless, which is why it’s often called a “silent” intruder
Outside, radon dissipates into the air and isn’t much of a concern. However, when it seeps through cracks in your foundation or gaps around pipes, it gets trapped inside your home.
According to the Environmental Protection Agency (EPA), radon is the second leading cause of lung cancer in the U.S. In Ohio, the risk is particularly high because our state’s average radon levels are often well above the national average.
Why Columbus is a Hot Spot
If you look at an EPA radon map, you’ll see that much of Ohio is shaded in dark red. This indicates “Zone 1,” which means there is a high potential for elevated radon levels. Columbus and the surrounding Franklin County areas are right in the heart of this zone.
- Geology matters: The soil in Central Ohio contains high concentrations of radium, which decays into radon gas.
- Home construction: Whether you have a basement, a crawlspace, or a slab-on-grade foundation, radon can find a way in.
- Tight seals: Modern, energy-efficient homes in Columbus are great for your utility bills, but they can also trap radon gas more effectively than drafty older homes.
How the Radon Testing Process Works
When you order a radon test, a licensed professional will place a continuous monitor or a charcoal canister in the lowest livable level of the home. This is usually the basement, even if it’s unfinished.
The test must run for at least 48 hours to get an accurate reading. All windows and exterior doors must remain closed for 12 hours before and during the test.
Reading Your Radon Test Report
Once the 48 hours are up, you’ll receive a report. This is the moment most buyers get a little nervous, but understanding the numbers makes it much less intimidating.
Radon is measured in picocuries per liter (pCi/L). Here is the breakdown of what those radon test results mean:
- 0 to 2 pCi/L: This is considered a low level. While no level of radiation is “safe,” this is generally acceptable.
- 2 to 3.9 pCi/L: The EPA suggests you consider mitigation at this level.
- 4.0 pCi/L and above: This is the official “Action Level.” The EPA and the State of Ohio strongly recommend installing a mitigation system to remove the gas from the home.
New Construction Isn’t Immune
I often hear people say, “The house is brand new, so I don’t need to test for radon.” Unfortunately, that’s a myth.
In fact, new homes are often built so tightly that radon has nowhere to go but up into your living space. While some builders install “passive” pipes, these don’t always work unless a fan is added.
Always test a new home before you move in. It’s much easier to have the builder or a contractor add a fan to an existing pipe than to start from scratch later.
Key Takeaways for Buyers
Item | Recommendation |
When to test | During your general home inspection period. |
Who should test | Always use an Ohio-licensed radon professional. |
The Action Level | Anything 4.0 pCi/L or higher needs a fix. |
Negotiation | Ask the seller to mitigate if levels are high. |
Retesting | Even with a system, retest every two years. |
Book Professional Radon Testing in Columbus, OH
Buying a home is a huge investment, and it’s easy to get overwhelmed by the paperwork and the inspections. But in a high-risk area like Columbus, radon testing is one of those small steps that makes a massive difference for your long-term health.
Schedule your radon test today with Linkhorn Inspection Group. It’s a simple test that provides a clear answer. If the levels are low, you can move in with confidence. If they’re high, you can get them fixed before moving.
