Radon Information

Radon is the #1 cause of lung cancer in non-smokers. Exposure to high levels of radon in indoor air results in an increased risk of developing lung cancer. The risk of cancer depends on the level of radon and how long a person is exposed to those levels.

Radon is a radioactive gas that comes from the breakdown of uranium in soil and rock. It is invisible, odourless, and tasteless. When radon is released from the ground into the outdoor air, it is diluted and is not a concern. However, in enclosed spaces, like homes, it can accumulate to high levels and become a risk to the health of you and your family.

Radon gas breaks down to form radioactive elements that can be inhaled into the lungs. In the lungs, radon continues to break down, creating radioactive particles that release small bursts of energy. This energy is absorbed by nearby lung tissue, damaging the lung cells. When cells are damaged, they have the potential to result in cancer when they reproduce.

The air pressure inside your home is usually lower than in the soil surrounding the foundation. This difference in pressure draws air and other gases, including radon, from the soil into your home.

Radon can enter a home anywhere it finds an opening where the house contacts the ground: cracks in foundation floors and walls, construction joints, gaps around service pipes, support posts, window casements, floor drains, sumps, or cavities inside walls. (Source: Health Canada)

Dauphin and the surrounding area have been identified as having high levels of radon, so it is very important that you get your home tested to protect your family’s health.

During the winter of 2023/24, 139 homes participated in the City of Dauphin’s Radon Test Kit Challenge, using 91-day alpha track tests. This represented 4% of the community’s dwellings. Of the participating homes, 92% recorded radon concentrations above Health Canada’s guideline of 200 Bq/m³.

More recent testing initiatives have continued to identify elevated radon concentrations:

• 2024/25 Radon Test Kit Challenge: Of the 68 results recorded, 83.8% exceeded Health Canada's guideline of 200 Bq/m³.
• 2025/26 Radon Test Kit Challenge: Of the 22 test results received, 95.5% exceeded the guideline.

You can see the results in the Take Action on Radon Community Report Nov 2026.pdf for Dauphin. These results reflect homes that participated in the testing initiatives and may not represent radon levels in every home in Dauphin. However, they reinforce the importance of testing to determine the radon concentration in your own home.

The City of Dauphin, in partnership with the Dauphin Public Library, offers a digital radon screening device lending program. With funding from Health Canada and the Manitoba Lung Association, this initiative helps residents easily check radon levels in their homes.

How It Works: Borrow a digital radon screening device for a 4-week period to get a quick reading of radon levels in your home. After your initial screening, be sure to follow up with a 90-day radon test kit for a more accurate reading. These kits can be purchased from Take Action on Radon.

This program is a great way to help you take the first steps in protecting yourself and your family from dangerous radon levels that can affect your health. Let’s work together to ensure safer homes for Dauphin residents and our community. 

Stop by the Dauphin Public Library to sign out a device, or call 204-638-6410 for more details!

If you’ve tested for radon and your result is above the Canadian guideline of 200 becquerels per cubic metre (Bq/m³), it is important to take action to reduce your radon level. More than 3,000 Canadians die each year from radon-induced lung cancer.

What You Need to Know..

• Lowering radon levels in your home requires specific technical knowledge and skills to ensure the job is done properly. Be sure to hire an experienced, reputable contractor to mitigate radon in your home.
• A radon mitigation system can often be installed in less than a day and can reduce the radon level by more than 80%.
• The higher the radon concentrations, the sooner action should be taken to reduce levels to as low as practically possible. 
• Contact the Canadian National Radon Proficiency Program (C-NRPP) at 1-855-722-6777 or search for a  list of certified service providers in your area who can help reduce the level of radon in your home.
• If you need financial assistance to help pay for radon mitigation, the Canadian Lung Association offers a grant of $1,500 towards the cost of a radon mitigation system if you have a lung cancer diagnosis or if you have low to moderate income. Click to see if you are eligible: The Lungs Matter: Home Radon Mitigation Grant Program.

Please take action on radon and protect yourselves and your loved ones from this radioactive gas.