Canadian Guideline for Exposure to Radon in Indoor Air, June 2007
In March 2006, the Radon Working Group of the Federal Provincial Territorial Radiation Protection Committee proposed the following radon guidelines:
These recommendations have resulted in the current Canadian radon guideline of 200 Bq/m3.
Canadian Radon Measurement Protocols Issued by Health Canada
E-PERM detectors are the ideal screening method for determining whether remedial action is required, in accordance with Canadian radon measurement guidelines.
Guide for Radon Measurements in Public Buildings (New Version January, 2016)
Guide for Radon Measurements in Residential Dwellings
Canadian Radon Mitigation Protocol Issued by Health Canada
Reducing Radon Levels in Existing Home
A Canadian Guide for Professional Contractors (pdf)
World Health Organization (WHO)
The WHO has issued a comprehensive booklet on the hazards of indoor radon. "To limit the risk to individuals a national reference level of 100 Bq/m3 is recommended."
For a summary of the WHO booklet, click here (pdf)
Tarion Home Warranty Coverage
Radon gas is included in the Tarion New Home Warranty which applies to new homes in Ontario. Home owners should arrange for a short-term radon test well within the first year of the warranty and then initiate a claim if the radon level is above 200 Bq/m3. The radon level will need to be confirmed with a long-term test by a certified C-NRPP inspector.
In years 2 to 7, the claim needs to include specific building code violations (for basement construction), which may not necessarily be present. For this reason, testing the home for radon early in the first year of the warranty is important. Some builders will waive this restriction, and provide a full radon warranty for up to 7 years.
For a detailed description of the Tarion Warranty, click here (pdf), click here (pdf)