You know how a surprise home inspection issue can ruin a real estate deal or cause panic at home.
We see this worry every week when a test comes back high. The good news is that this invisible issue is easy to measure and completely fixable.
We at Iowa Radon Systems want you to understand the real risk rather than worry about a vague one. Let’s look at the specific data on radon exposure and radon lung cancer risk, what it actually means for your health, and the exact steps to resolve it quickly.
Is Radon Dangerous?
Is radon dangerous? Yes, it is the second leading cause of lung cancer in the United States, right behind smoking. Current 2026 data from the EPA and the Surgeon General confirm that this radioactive gas causes about 21,000 lung cancer deaths in the US every year. We often remind homeowners that it is also the number one cause of lung cancer among people who have never smoked.
Radon comes from the natural breakdown of uranium in soil. When you breathe it in, tiny radioactive particles lodge in the lining of your lungs. Over time, the radiation from these particles damages lung cells. Our team points out that this cumulative cellular damage is exactly what can lead to lung cancer years later.
The short version
Radon does not cause sudden illness or immediate symptoms. The concern is long-term exposure to elevated levels in the place you spend the most time, like your home or office. We recommend that you test the property, and install a mitigation system if the level is high.
Long-Term vs. Short-Term Exposure
Long-term radon exposure risk builds with time and concentration. Living, sleeping, or working for years in a space above the action level is the real concern, not a short visit to a high-radon basement. We focus our testing on the areas where your family spends the most time.
A higher radon level over more years means a higher risk of health effects.
This is why where you test matters. Radon is usually highest on the lowest livable level of a home, especially in basements or slab-on-grade foundations.
If your kids have a playroom downstairs, or someone works from a basement office, that is the level that matters most. The EPA action level is 4.0 pCi/L, and the agency suggests considering a fix between 2.0 and 3.9 pCi/L. We always note that the World Health Organization (WHO) recommends taking action at an even lower threshold of 2.7 pCi/L. There is no known safe level, so lower is always better.
Smoker vs. Non-Smoker Risk
Smoking and radon work together to multiply your lung cancer risk. For a smoker, radon exposure raises the danger up to 10 times higher than it does for someone who has never smoked. We see the EPA data confirming that the combined risk is much worse than either factor alone.
That does not mean non-smokers are safe. Because so many non-smokers live with elevated radon, it is the top cause of lung cancer in that specific group. Our experience shows that many people are shocked by this statistic.
| Group | How radon affects risk | What to do |
|---|---|---|
| Never smoked | Radon is the leading cause of lung cancer in this group | Test and fix levels at or above 4.0 pCi/L |
| Former smokers | Risk from past smoking plus radon exposure | Test and keep levels as low as you can |
| Current smokers | Combined risk is 10 times higher than for non-smokers | Test, fix radon, and talk to your doctor about quitting |
| Children | Spend many hours at home, often on lower levels | Test the lowest livable level where they sleep or play |
If you have questions about your personal health risk, your doctor is the right person to ask. We measure your home accurately and fix it if needed.
Why You Can’t Tell Without Testing
You cannot tell if a home has radon because the gas is completely undetectable to human senses. You will not experience any immediate symptoms from radon health effects. We often find high levels in properties of all types, including the following:
- Brand-new construction homes
- 100-year-old farmhouses
- Homes situated right next door to one that tested low
In Iowa, the chances of a high result are higher than almost anywhere in the country. We know the glaciers left uranium-bearing soil across the entire state.
In fact, the Iowa Department of Health and Human Services (HHS) reports a statewide average indoor radon level of 8.5 pCi/L. This is significantly higher than the national average of just 1.3 pCi/L. Our guide on why radon levels in Iowa are so high explains the geology behind this. Every single one of Iowa’s 99 counties is in EPA Radon Zone 1. Recent studies show about 71.6% of homes in the state have elevated levels.
The Fix: Test, Then Mitigate If Needed
The best fix for radon is to test your home first and then install an active soil depressurization system if levels are high. Radon is one of the most fixable home health risks you will face. We want to bring some relief to this process.
Step 1: Test your home
A professional test uses a continuous radon monitor placed on the lowest livable level for at least 48 hours. It records an hourly reading so you can see your average and exactly how the levels fluctuate. We can easily schedule a radon test with our Iowa HHS-credentialed technicians.
Step 2: Read your result
If your result is at or above 4.0 pCi/L, the EPA officially recommends fixing the home. Between 2.0 and 3.9 pCi/L, you should seriously consider it. Our guide on what radon level is safe walks through each specific range.
Step 3: Install a mitigation system
Radon mitigation pulls soil gas from under your foundation before it gets inside and vents it safely above the roofline. A well-designed active soil depressurization (ASD) system routinely brings Iowa homes from above 4.0 pCi/L to below 1.0 pCi/L. We have achieved up to a 98.9% reduction in many local houses. A post-mitigation test always confirms the final result.
The whole process is simpler and more affordable than most people expect.
- You can send photos for a free virtual estimate.
- Get a flat-rate price before anyone visits the property.
- Secure a 5-year warranty on every installed system.
If you have been putting off testing because you are worried about what you will find, know that a high result has a clear, proven fix. We are ready to help you secure a safer home today. Reach out to schedule your professional measurement and take control of your indoor air quality.