Radon

Radon is a gas that can seep into homes and increase the risk of lung cancer over time. By reading this page, you’ll learn what radon is, how to test for it, and the steps you can take to reduce your exposure. Protecting your home from radon is easier than you think, and we’re here to guide you every step of the way.

What is radon, and where does it come from?

Radon is a naturally occurring, invisible gas that comes from the breakdown of uranium in soil, rocks, and water. While it’s harmless outdoors, radon can enter your home through cracks in floors or walls, gaps around pipes, or even well water. Once inside, radon can build up to unsafe levels.

Why is radon dangerous?

When you breathe in radon, it can harm your lungs over time. Radon is the second leading cause of lung cancer in Canada, after smoking. The longer you’re exposed to high radon levels, the greater the risk.

How can you check radon levels in your home?

Testing your home is the only way to know if radon is a problem. Here’s how to do it:

• Use a radon test kit: You can find kits at most home improvement stores. If possible, test between September and April when windows are typically closed for the most accurate results.

• Hire a certified radon expert: They can test your home and recommend solutions if needed.

What are safe radon levels?

Health Canada says indoor radon levels should be below 200 Becquerels per cubic metre (Bq/m³). If your home tests above that:

• 200–600 Bq/m³: Make improvements within two years.

• Above 600 Bq/m³: Take action within one year.

What should you do if your home has high radon levels?

Don’t worry—there are solutions to reduce radon in your home. A certified radon professional can help you with options like:

• Sealing cracks and gaps: This prevents radon from entering your home.

• Improving ventilation: Bringing in fresh air can lower radon levels.

• Installing a radon mitigation system: A common method is sub-slab depressurization, which vents radon safely outside.

Is radon a concern in Elgin, Oxford, and St. Thomas?

Yes, radon levels in our area are above the national average. According to Health Canada:

• Elgin-St. Thomas: 7.5 per cent of homes have high radon levels

• Oxford County: 11.5 per cent of homes have high radon levels

How often should you test for radon?

Health Canada recommends testing:

• Every two years to monitor changes in radon levels

• After any renovations or system changes, like basement updates or installing new HVAC systems

Where can you get more information about radon?

Learn more about radon from trusted sources:

• Government of Canada radon resources

• The Lung Association

• Take Action on Radon