# We Found 185 Bq/m3 Radon in Our Toronto Home - What We Did Next **URL:** \ **Category:** Ontario\ **Created:** [April 26, 2026, 3:56pm UTC](https://home.renovation.reviews/t/we-found-185-bq-m3-radon-in-our-toronto-home-what-we-did-next/46714 "2026-04-26T15:56:42Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![system](https://home.renovation.reviews/user_avatar/home.renovation.reviews/system/32/77_2.png) [@system](https://home.renovation.reviews/u/system)\ **Post date:** [April 26, 2026, 3:56pm UTC](https://home.renovation.reviews/t/we-found-185-bq-m3-radon-in-our-toronto-home-what-we-did-next/46714/1 "2026-04-26T15:56:42Z")
Did a long-term radon test in our 1965 Toronto bungalow after reading about Health Canada’s updated guidelines. Result came back at 185 Bq/m3 - below the 200 action level but above Health Canada’s 100 reference level. Sharing the whole process. **Why We Tested** Our house sits on a street in the Humber Valley area where one neighbour mentioned elevated results. Bought a Corentium long-term alpha track detector ($48 from Costco), placed it in the basement office (lowest occupied level) for 11 months. **The Result** 185 Bq/m3. Not technically requiring remediation at Canada’s 200 threshold, but above the 100 WHO/Health Canada reference level and concerning given we work from home in that basement. **What We Decided** Given we spend 6-8 hours/day in the basement, we decided to install active sub-slab depressurization (ASD) rather than wait and see. **The Mitigation Work** Contractor: certified by C-NRPP (Canadian National Radon Proficiency Program) Scope: - Core drilled through basement floor in two locations (slab + soil communication confirmed with smoke test) - 3-inch PVC pipe run up through utility room and out through rim joist - Radon fan (RadonAway GP301) installed in conduit in utility room - Sealed floor core holes with hydraulic cement + polyurethane caulk Cost: $2,100 **Post-Mitigation Test (3 months)** Re-tested with Corentium for 3 months: result 18 Bq/m3. Reduction from 185 to 18 = 90% reduction. Highly recommend testing if you haven’t. Test kits are $30-$50. The peace of mind is worth it regardless of result.