What To Do If Your Radon Test Shows High Levels

Receiving a radon test report with elevated results can be unsettling. If your home tests above the recommended level, it's natural to wonder what happens next. The good news is that high radon levels are a common problem in Ohio, and they can be addressed with proven mitigation solutions.
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At Cincinnati Radon, we help homeowners understand their test results and take the right steps to protect their families.

Step 1: Don't Panic—Understand Your Results

The U.S. Environmental Protection Agency (EPA) recommends taking action if your home's radon level is 4.0 pCi/L or higher. Even levels between 2.0 and 4.0 pCi/L may warrant mitigation, especially if you spend significant time in the basement or lower levels of your home.

A high test result doesn't mean your family is in immediate danger, but it does mean long-term exposure should be reduced as soon as practical.

Step 2: Confirm the Reading If Needed

If you used a short-term radon test and the results are close to the EPA action level, a follow-up test may be recommended to verify the average radon concentration. Radon levels naturally fluctuate from day to day due to weather, ventilation, and seasonal changes.
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If your initial result is significantly above 4.0 pCi/L, however, it's generally best to begin planning for mitigation rather than delaying action.

Step 3: Schedule a Professional Radon Evaluation

Every home is different. Foundation type, basement design, crawl spaces, sump pits, and soil conditions all affect how radon enters the home.
A qualified radon professional can inspect your property, explain where the gas is likely entering, and recommend the most effective mitigation system for your specific home.
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In Cincinnati and throughout southwest Ohio, elevated radon levels are relatively common because much of the region falls within the EPA's highest radon potential zone.

Step 4: Install a Radon Mitigation System

The most effective solution for high radon is a professionally installed radon mitigation system.
Most residential systems use active sub-slab depressurization, which safely draws radon gas from beneath the home's foundation and vents it above the roofline before it can enter the living space.
A properly designed system can often reduce indoor radon levels by up to 99%, depending on the home's construction and existing conditions.

Related Articles: How to Choose the Right Radon Mitigation Company

Step 5: Retest After Installation

Installing a mitigation system isn't the final step.

After installation, your home should be retested to verify that radon levels have been successfully reduced. Most professionals recommend testing within a few days after the system is operating and continuing to test every couple of years or after major renovations.
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Routine testing provides peace of mind that your system continues to perform properly.

Can You Lower Radon Yourself?

While sealing visible foundation cracks may help reduce small entry points, it should never be relied on as the primary solution.
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Because radon travels through the soil beneath your home, professional mitigation systems are designed to control the pressure beneath the foundation rather than simply block individual openings. This approach consistently delivers far better long-term results.

Why Acting Quickly Matters

Radon is the second leading cause of lung cancer in the United States after smoking. Since it is colorless, odorless, and invisible, testing is the only way to know whether your home has elevated levels.
Fortunately, high radon is one of the easiest indoor air quality issues to correct. Once a mitigation system is installed, most homeowners gain long-term protection with minimal maintenance.

Cincinnati Radon Can Help

If your radon test shows elevated levels, you don't have to navigate the process alone.
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At Cincinnati Radon, we provide professional radon testing, customized mitigation system design, expert installation, and post-installation testing. Our goal is simple: reduce your home's radon levels efficiently while giving you confidence that your indoor air is safer for your family.

If you've recently received a high radon test result, contact Cincinnati Radon today to schedule a professional evaluation and learn about the best mitigation solution for your home.