Government of Canada Radon Action Guideline

Remedial measures should be undertaken in a dwelling whenever the average annual radon concentration exceeds 200 Bq/m3 in the normal occupancy area.
The higher the radon concentration, the sooner remedial measures should be undertaken.
When remedial action is taken, the radon level should be reduced to a value as low as practicable.
The construction of new dwellings should employ techniques that will minimize radon entry and facilitate post-mitigation radon removal should this subsequently prove necessary.

NO REGULATION GOVERNS WHAT IS AN ACCEPTABLE EXPOSURE. CONCENTRATIONS AS LOW AS 100 Bq/m3 CAN INCREASE YOUR RISK OF DEVELOPING LUNG CANCER

                                   World Regulatory Radon Guidelines

Organization                                                              Residential (Bq/m3)

Health Canada                                                                      200
World Health Organization                                                         100
International Commission on Radiological Protection               300
United States Environmental Protection Agency        150
European Union                                                                     200

Radon Gas Detectors for Home and Workplace

Algoma Radon Testing

Government of Canada Radon Action Guideline

Remedial measures should be undertaken in a dwelling whenever the average annual radon concentration exceeds 200 Bq/m3 in the normal occupancy area.

The higher the radon concentration, the sooner remedial measures should be undertaken.

When remedial action is taken, the radon level should be reduced to a value as low as practicable.

The construction of new dwellings should employ techniques that will minimize radon entry and facilitate post-mitigation radon removal should this subsequently prove necessary.