Radon is a colourless, odourless gas that can damage the cells in your lungs. Over time, this damage can lead to lung cancer—often without any early symptoms. In Ontario alone, radon is linked to about 850 deaths each year.
Because you can’t see, smell, or taste it, the only way to know if your home has high radon levels is through testing.
There’s no truly “safe” level of radon, but health organizations set action levels where the risks rise sharply.
- Health Canada: 200 Bq/m³
- World Health Organization: 100 Bq/m³
- U.S. EPA: 4.0 pCi/L (about 150 Bq/m³)
If your test results are above these thresholds, it’s time to take action to protect your family.