“Radon Montreal” appears about 480 times per month in SE Ranking Canada, with a difficulty of 15. The site’s best ranking for this term is around 16th place, on an English map page. There is no French page explaining what to do in Montreal.
A Map Does Not Measure Your Home
Radon enters through the ground, slab cracks, joints, and penetrations. Two homes on the same street can have very different levels. A radon map of Quebec shows trends. It does not replace a dosimeter in the room where you live.
In Quebec, the site reminds that one in five homes can exceed 200 Bq/m³. This is not an average rate for a Montreal borough. The only way to know yours is to measure.
Which Test to Use in Montreal
For an initial reading or a purchase offer, the 4-day test (74.72 $ taxes included (detector 39.99 $ + return and laboratory 25 $ + taxes)) provides screening. For exposure during the heating season, the long-term 91-day test (74.72 $ taxes included (detector 39.99 $ + return and laboratory 25 $ + taxes)) remains in place during normal occupancy.
Place the device on the lowest occupied floor, away from drafts. In a condo, this is often the living room or a bedroom on the lowest level, not the balcony or parking area.
If the Result Exceeds 200 Bq/m³
Health Canada sets the intervention threshold at 200 Bq/m³. Above this, radon entry is reduced by sub-slab depressurization. Gaz Radon Québec installs this system throughout Quebec, including Montreal and Laval. The standard installation costs 2,799.99 $ + taxes. The cost details and the quote confirm the price before work begins. The lowest price guarantee is 5% below a written quote from a competitor for a comparable installation.