There is an invisible threat that may be present in your home right now, and most homeowners have no idea it is there. Radon is a naturally occurring radioactive gas that seeps up from the ground and can accumulate to dangerous levels inside homes. For homeowners and buyers in the Asheville area and across Western North Carolina, radon testing is not just a good idea, it is an urgent one. The mountain geology that makes this region so strikingly beautiful also makes it one of the higher-risk areas for radon exposure in the entire state.
Why Western North Carolina Has Elevated Radon Risk
Radon forms from the natural breakdown of uranium in soil and rock. The granite and metamorphic rock that underlie much of the WNC mountains contain higher concentrations of uranium and radium than the soils found in flatter parts of the state. As that rock breaks down over time, radon gas is released and migrates upward through the soil, finding its way into homes through foundation cracks, gaps around pipes, crawlspace openings, and other entry points.
The North Carolina Department of Health and Human Services has identified several WNC counties as having elevated radon potential, and data from the EPA consistently places North Carolina among the states where homeowners should be testing. Homes with basements or crawlspaces, which are extremely common in mountain construction, face the greatest exposure risk because those lower-level spaces act as collection points for the gas before it moves into living areas.
What Radon Does to Your Health
Radon is the second leading cause of lung cancer in the United States, responsible for an estimated 21,000 deaths each year according to the EPA. It is colorless, odorless, and tasteless, so there is absolutely no way to detect it without testing. Long-term exposure to elevated radon levels, even without ever smoking a cigarette, dramatically increases a person’s risk of developing lung cancer. The combination of radon exposure and smoking raises the risk even further.
The EPA action level is 4 picocuries per liter (pCi/L) of air. At or above that concentration, mitigation is strongly recommended. Many homes in high-risk regions like WNC are found to exceed that threshold, and some test significantly higher.
What Radon Testing in Western North Carolina Involves
The good news is that radon testing is straightforward, non-invasive, and affordable. There are two primary types of tests: short-term and long-term. Short-term tests, which typically run between two and seven days, are the most common option during a real estate transaction because results are available quickly. Long-term tests run for 90 days or more and provide a more accurate picture of a home’s average radon level over time.
Professional radon testing in Western North Carolina involves placing a testing device in the lowest livable level of the home, typically a basement or ground-floor room. The home is kept in closed-house conditions during the test, meaning windows and doors remain shut except for normal coming and going. Once the test is complete, results are analyzed and provided in a clear report.
At ProGuard Property Services, radon testing can be added to a standard home inspection or scheduled as a standalone service, making it easy to get answers without extra hassle.
What Happens if Radon Levels Are High
Finding elevated radon in a home does not mean the deal falls apart or that the home is unlivable. It simply means mitigation is needed. Radon mitigation systems are well-established and highly effective. The most common type is a sub-slab depressurization system, which involves installing a pipe through the foundation and using a fan to draw radon from beneath the home and vent it safely outdoors. These systems typically reduce radon levels by up to 99 percent and require very little ongoing maintenance.
In a real estate transaction, elevated radon test results can be used as part of the negotiation process, with the seller agreeing to install a mitigation system prior to closing or offering a credit toward the cost.
When to Test for Radon
Any time is a good time to test, but radon testing is especially important during a home purchase. Buyers who skip radon testing are taking an unnecessary risk with their long-term health. Current homeowners who have never tested their homes should also consider scheduling a test, even if they have lived there for years. Radon levels can change over time as soil conditions shift and as homes settle and develop new entry points for the gas.
Homes with basements, crawlspaces, slab foundations in high-risk zones, and any home located in WNC’s mountain counties should be considered a priority for radon testing.
Frequently Asked Questions About Radon Testing
What is radon and why is it dangerous? Radon is a naturally occurring radioactive gas produced by the decay of uranium in soil and rock. It is dangerous because it can accumulate inside homes and, with long-term exposure, significantly increases the risk of lung cancer. It has no smell, color, or taste, so testing is the only way to know if it is present.
How common is radon in Western North Carolina homes? Western North Carolina sits on granite and metamorphic rock that naturally produces more radon than much of the rest of the state. Several WNC counties have elevated radon potential, and testing data shows a meaningful percentage of homes exceeding the EPA action level of 4 pCi/L.
Should radon testing be part of a home inspection? Yes, adding radon testing to your home inspection is one of the smartest decisions a buyer in WNC can make. It is an affordable add-on that can reveal a serious health concern before you close on a home. ProGuard Property Services offers radon testing alongside standard home inspection services.
How long does radon testing take? Short-term radon tests run between two and seven days and are the standard choice during a real estate transaction. Long-term tests take 90 days or more and give a more accurate average reading over time. Results from a short-term test are typically available shortly after the testing device is retrieved.
If my home tests high for radon, does that mean I should not buy it? Not at all. Elevated radon levels are very fixable. A professional mitigation system can reduce radon levels by up to 99 percent and is a one-time installation. Knowing about high radon before purchasing gives buyers the opportunity to negotiate for mitigation as part of the transaction.
Can a new home have a radon problem? Yes. New construction is not immune to radon. Even newly built homes can have elevated levels depending on the soil and rock beneath them and how the foundation is sealed. Testing is recommended regardless of the age of the home.
Protecting your family starts with knowing what is in the air you breathe every day. ProGuard Property Services offers professional radon testing in Western North Carolina as part of a comprehensive approach to home safety. Schedule your inspection today and get the peace of mind you deserve.