Radon Levels in Cobourg

In Cobourg, average indoor radon is 91 Bq/m³ (below the Ontario average of 161 Bq/m³). 13% of tested homes exceed Health Canada's 200 Bq/m³ reference level. Local geology (Glacial) contributes to regional variation.

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Radon risk category

Low

Health Canada reference: 200 Bq/m³

Mean indoor radon

91 Bq/m³

Ontario avg: 161 Bq/m³

Homes above 200 Bq/m³

13%

Provincial avg: 22%

Geology note

Cobourg sits on Glacial 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.

Cobourg vs Ontario

Cobourg mean radon91 Bq/m³

Ontario provincial average161 Bq/m³

Health Canada reference level200 Bq/m³

Homes above 200 Bq/m³13%

Test to confirm your level

Regional averages are moderate, but radon varies house to house. Health Canada recommends all Canadians test their homes.

1Use a long-term test kit during heating season (October–April)
2Place the detector away from drafts, windows, and exterior walls
3If results are below 200 Bq/m³, retest every 2 years
4If results exceed 200 Bq/m³, consult a C-NRPP certified mitigator

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 →