Understanding what radon testing is is essential for safeguarding your home and loved ones. Radon is a radioactive gas you can’t see, smell, or taste, yet long-term exposure can lead to serious health risks—including lung cancer. Because this gas can be present in nearly every home across the United States, testing isn’t just recommended—it’s critical.
What Is Radon and Why Should You Care?
Radon is a naturally occurring gas produced by the breakdown of uranium found in soil and rock. As it rises through the ground, it can enter your home through cracks in floors, walls, and even water sources like wells. Poorly ventilated spaces allow it to accumulate to dangerous levels.
The Environmental Protection Agency (EPA) warns that radon is poisonous and the leading cause of lung cancer in non-smokers, second only to smoking overall. While exposure doesn’t cause immediate symptoms, its radioactive particles can damage lung tissue over time and lead to life-threatening conditions.
How Does Radon Testing Work?
To understand what radon testing is, it’s important to know how it’s measured. Radon levels are expressed in picocuries per liter (pCi/L), and according to the EPA, action should be taken when levels reach 4.0 pCi/L or higher. However, lower levels can still pose health risks if exposure continues for long periods.
There are two main types of tests:
- Short-Term Testing:
Measures radon levels over a few days to a couple of months—perfect for initial checks or during home transactions.
- Long-Term Testing:
Runs for more than 90 days, providing a better understanding of year-round exposure.
Hiring a certified radon testing professional ensures the most accurate and reliable results.
When Should You Test Your Home?
Every homeowner should schedule radon testing under these circumstances:
- Before buying or selling a house
- After significant renovations, especially in the foundation
- At least every two years, as recommended by the EPA
- When moving to a known high-risk radon area
- If anyone at home develops unexplained respiratory symptoms
Even modern, newly constructed homes can have unsafe radon levels, so regular testing is always a wise decision.
Warning Signs That Indicate the Need for Radon Testing
Because radon has no smell or color, you won’t notice it without testing. However, these situations might indicate a higher risk:
- Cracks or gaps in the flooring or walls
- Limited airflow in the lower levels of your home
- Use of groundwater or private wells
- Basements or crawl spaces beneath living areas
- Increased coughing or breathing problems at home
Taking a proactive approach with routine testing is the best way to catch elevated levels early.
DIY vs. Professional Radon Testing: Which Is Better?
You can purchase DIY radon kits from local stores, but they have some limitations:
- Results may be unreliable if the kit isn’t used properly
- No expert to interpret results or guide you through the next steps
- Improper placement can lead to incorrect readings.
In contrast, professional radon testing offers:
- Equipment calibrated to EPA standards
- Accurate device placement for precise readings
- Expert advice on interpreting results and possible mitigation
What If Your Home Tests High for Radon?
If your radon test shows levels of 4.0 pCi/L or higher:
- Perform a second test to confirm the results
- Hire a professional to install a reduction system.
- Seal visible cracks and gaps in your foundation.n
- Improve ventilation throughout your home.
Understanding Radon Mitigation Systems
Radon mitigation systems are designed to pull radon from beneath your home and safely vent it outside. Here’s how they typically work:
- A fan and vent pipe system is installed to pull radon gas from beneath your home’s foundation and safely release it outside.
- The gas is vented above your roofline, where it disperses safely.
- Systems are discreet, efficient, and long-lasting.
Keep in mind, sealing alone isn’t enough. Proper mitigation ensures long-term protection.
Why Some Areas Face Higher Radon Risks
Certain parts of the U.S.—like Colorado, Iowa, and the Appalachian region—have higher radon concentrations due to their geology. The EPA divides risk levels into three zones:
- Zone 1: High potential (above 4.0 pCi/L)
- Zone 2: Moderate potential (2.0–4.0 pCi/L)
- Zone 3: Low potential (below 2.0 pCi/L)
Still, low-risk zones don’t guarantee a radon-free home. Regardless of location, every home should be tested.
How to Reduce Radon Exposure
In addition to mitigation systems, here are other ways to reduce radon:
- Open windows regularly for better air circulation
- Consider installing a heat recovery ventilator (HRV) to maintain balanced airflow while improving indoor air quality and energy efficiency.
- Seal entry points with specialized caulk or foam
- Check sump pumps and ensure covers are airtight.
- Use radon-resistant techniques during new construction.n
These methods support a mitigation system but don’t replace the need for one if levels are elevated.
Conclusion
Knowing what radon testing is and acting on that knowledge can save lives. Testing is simple, affordable, and effective at detecting a serious household hazard. Whether you’re moving, selling, or simply looking out for your family’s health, there’s no better time than now to schedule a radon test.
For reliable testing and certified mitigation services, contact DSM Radon—your trusted partner in keeping homes safe from radon exposure.
FAQs: Essential Questions About Radon Testing
1. Do I still need to test if my neighbor’s home has low radon levels?
Yes, because radon levels can differ from one home to the next, even within the same neighborhood.
2. How long do radon tests usually take?
Short-term tests last around 48 hours, while long-term tests may span several months.
3. Can I test for radon myself?
Yes, but professional testing offers greater accuracy and reliability, especially for real estate or health concerns.