Etobicoke radon testing and mitigation
~365,000 residents. ~1 in 23 homes test above the Health Canada radon guideline.
Why Etobicoke homeowners test
Etobicoke's lakefront and Humber River communities sit on varied soil types. Basement use is heavy in this part of Toronto, making radon testing particularly worthwhile.
Our Etobicoke service
- Testing: $99 (standard) or $399 (real estate)
- Mitigation: $2,800 to $3,800 preliminary estimate 3
- Typical scheduling: within 3-5 business days
- Same-week availability most months
Etobicoke-specific questions
Do you service all of Etobicoke?
Yes. Every Etobicoke neighbourhood including Mimico, Long Branch, New Toronto, Alderwood, Sunnylea, Markland Wood, The Kingsway, Princess Anne Manor, Centennial Park, Rexdale, Humber Bay, and West Mall. Same $99 pricing, no distance surcharge.
Which Etobicoke neighbourhoods test highest for radon?
Older Mimico, Long Branch, and New Toronto bungalows along the lakefront tend to top the list. Many of these homes are from the 1940s to 1960s with stone or block foundations and finished basement living space. Rexdale and Centennial Park homes from the 1960s and 1970s also test higher than the GTA average. Newer Humber Bay condos test very low because of high-floor dilution.
Lakefront Etobicoke (Mimico, Long Branch) homes have higher water tables. Does that affect radon?
Indirectly. High water tables do not directly increase radon, but they do increase the likelihood of foundation cracks and waterproofing repairs, both of which create soil-gas entry points. Combined with older lakefront housing stock, this is why Mimico and Long Branch bungalows test higher on average than new condos in the same area.
My Etobicoke home is a recent build in Humber Bay or another post-2021 development. Tarion coverage?
Yes if purchased from a builder on or after Feb 1, 2021 and inside the 7-year Tarion warranty. Etobicoke has growing inventory in Humber Bay, the Stockyards area, and select infill projects in The Kingsway and Sunnylea. C-NRPP certified test at or above 200 Bq/m³ triggers builder-funded mitigation up to $50,000.
About these numbers
Population and home counts come from Statistics Canada's 2021 Census of Population 1 . These are exact figures.
The per-city radon percentage is a synthesis estimate, not a number pulled directly from any single source. We blend three datasets: Health Canada's Cross-Canada Survey of Radon Concentrations in Homes (the 2012 federal baseline) 4 , the University of Calgary's Evict Radon citizen-science mapping project 2 , and Take Action on Radon's aggregated municipal data 5 .
The federal baseline often reports lower above-guideline rates than the newer citizen-science projects. Two reasons: the federal study is now 14+ years old, and the newer citizen-science projects sample more aggressively in homes built under tighter modern building codes (which trap soil gas more effectively than older draftier construction). Where these sources disagree on a specific municipality, our published percentage lands on a working midpoint. So if you click through to the federal survey expecting to find "Etobicoke 4.5%" verbatim, you won't. The federal survey may report a lower figure for the same area, and the citizen-science maps often report a higher one. We chose the midpoint because no single source is definitive.
None of this gives you a definitive percentage for your specific home. Two homes on the same street can test 30 Bq/m³ apart. The only reliable answer for your home is a test on that home.
References
- 1.Statistics Canada. Census Profile, 2021 Census of Population↗ (2022)↩
- 2.Evict Radon. Evict Radon National Study↗↩
- 3.Health Canada. Government of Canada Radon Guideline↗↩
- 4.Health Canada. Cross-Canada Survey of Radon Concentrations in Homes: Final Report↗ (2012)↩
- 5.Canadian Association of Radon Scientists and Technologists (CARST). Take Action on Radon↗↩
See our full research bibliography at /sources.