By Canadian Radon Data Team · Sourced from official open data
Direct municipal dataRadon Levels in Sudbury
In Sudbury, average indoor radon is 268 Bq/m³ (above the Ontario average of 161 Bq/m³). 28% of tested homes exceed Health Canada's 200 Bq/m³ reference level. Local geology (Sedimentary) contributes to regional variation.
Geology note
Sudbury sits on Sedimentary 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.
Sudbury vs Ontario
Mitigation recommended
Average indoor radon in this area exceeds Health Canada's 200 Bq/m³ reference level. If your home tests high, hire a C-NRPP certified mitigator.
- 1Confirm levels with a long-term test kit (minimum 3 months)
- 2If results exceed 200 Bq/m³, contact a C-NRPP certified professional
- 3Sub-slab depressurization typically reduces levels by 80–90%
- 4Retest after mitigation to verify the system works
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.
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