Radon Levels in Thompson

In Thompson, average indoor radon is 160 Bq/m³ (below the Manitoba average of 194 Bq/m³). 15% of tested homes exceed Health Canada's 200 Bq/m³ reference level. Local geology (Limestone) contributes to regional variation.

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Radon risk category

Moderate

Health Canada reference: 200 Bq/m³

Mean indoor radon

160 Bq/m³

Manitoba avg: 194 Bq/m³

Homes above 200 Bq/m³

15%

Provincial avg: 19%

Geology note

Thompson sits on Limestone bedrock or surficial deposits. Radon enters homes through cracks in foundations, sump pits, and utility penetrations. Geology explains regional averages, but individual home levels depend on construction, ventilation, and soil contact.

Thompson vs Manitoba

Thompson mean radon160 Bq/m³

Manitoba provincial average194 Bq/m³

Health Canada reference level200 Bq/m³

Homes above 200 Bq/m³15%

Testing strongly advised

15% of tested homes in this area exceed 200 Bq/m³. Individual homes vary — the only way to know your level is to test.

1Order a Health Canada approved long-term test kit
2Place the detector on the lowest occupied level for 3+ months
3Send the kit to the lab and compare results to 200 Bq/m³
4Retest every 2 years or after major renovations

Order a long-term radon test kit

Health Canada recommends a minimum 3-month test during heating season. Long-term kits give a more accurate picture than short 2-day charcoal tests.

Browse test kits on Amazon.ca →