radon under house

Radon

Last review/updated:  November 7, 2024

Radon is a naturally occurring, radioactive gas that comes from the breakdown of uranium found in rocks and soil. You can’t see, smell, or taste radon. When outside, radon does not usually cause health issues because it can disperse in the air. But when radon seeps into confined spaces like a house, it can build up to high levels and become harmful. 

PPH Takes Action Against Radon

Peterborough Public Health is offering workshops across the region throughout the month of November to share knowledge about radon and suggest ways people can mitigate radon exposure in their homes. Workshops will be held:

Monday, November 25, 7:00 p.m. – Lakefield, Marshlands Centre
64 Hague Blvd, Lakefield, ON K0L 2H0

Wednesday, November 27, 7:00 p.m. – Peterborough Public Health
Second Floor Multi-purpose Rooms
185 King St., Peterborough Ontario, K9J 2R8

A closed session is also being held at Curve Lake First Nation for Members

NOTE:  The first 20 households at each session who agree to be a part of the research study will receive a free radon test kit. The study consists of answering a brief questionnaire about the age and type of house you live in and sharing radon test results with the researchers.

What are the health effects? 

When a radioactive gas like radon is inhaled, radioactive particles can get trapped in your lungs. This damages lung tissue and over many years, can develop into lung cancer. The health risk from radon exposure is long term and often dependent on three things: 

  1. the level of radon in your home,
  2. the length of time (in years) you have been exposed, and 
  3. smoking habits or exposure to secondhand smoke. 

In Canada, radon is the second leading cause of lung cancer (after tobacco smoke). People who smoke have an even higher likelihood of developing lung cancer from radon than non-smokers. You can read more about the health effects of radon from the Canadian Lung Association. 

Is there radon in my home? 

Every house likely contains some radon. The likelihood of high radon levels cannot be predicted by the age or location of a home. The only way to know how much radon is in your home is to test. Health Canada recommends radon levels be below 200 becquerels per cubic metre (200 Bq/m3). 

How does radon get into my home? 

Radon can enter buildings through cracks in the foundation, gaps around pipes, open floor drains or any other area of exposed soil. Well water can also contain radon, which can be released into the air when water is drawn. 

 How radon enters a house

© Department of Natural Resources Canada. All rights reserved. 

What can I do? 

The only way to know your home’s radon gas level is to test for it. Testing is simple! Radon testing kits can be borrowed for free from Peterborough Public Library. Radon detectors can also be purchased from Take Action on Radon. You can also hire a certified Canadian radon testing company to test and mitigate radon levels. 

Health Canada recommends indoor air radon levels be below 200 becquerels per cubic metre (200 Bq/m3). If a long-term (3-6 months) radon detection test determines your home to be above that level, consult a certified radon professional (1-855-722-6777). Levels above 600 Bq/m3 should be remediated within one year; levels between 200 and 600 Bq/m3 should be remediated within two years. 

In Ontario, newly built homes have a 7-year warranty for radon remediation. If levels are above the guidelines set by Health Canada (200Bg/m3), this warranty should cover remediation costs. 

Resources 

For Health Professionals 

Pamphlets can be ordered in bulk from Health Canada by emailing radon@canada.ca  

A A A

Health Topics
For Professionals
Clinics
Classes