Oshawa radon testing and mitigation
175,383 residents. ~1 in 17 homes test above the Health Canada radon guideline.
Why Oshawa homeowners test
Oshawa's east-Durham housing stock spans 1950s GM-era brick bungalows in the south end through to the rapid post-2010 north Oshawa subdivisions (Windfields, Eastdale, Kedron). Mid-century homes with finished basements top the radon risk list; newer airtight builds trap gas effectively if soil-level radon is present.
Our Oshawa 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
Oshawa-specific questions
Do you service all of Oshawa?
Yes. Every Oshawa neighbourhood including downtown Oshawa, McLaughlin, Vanier, Eastdale, Windfields, Kedron, Donevan, Lakeview, Samac, Pinecrest, and the southern industrial-adjacent neighbourhoods. Same $99 testing price, no distance surcharge.
Which Oshawa neighbourhoods test highest for radon?
Older south Oshawa neighbourhoods (downtown core, Vanier, Donevan, McLaughlin) have 1950s to 1970s brick bungalows with block foundations and finished basement family rooms, conditions that favour radon accumulation. Newer north Oshawa subdivisions in Windfields and Kedron test lower on average but can still spike in individual homes due to airtight construction.
My Oshawa home is a post-2021 build in Windfields or Kedron. Tarion coverage?
Yes if you purchased from a builder on or after Feb 1, 2021 and your home is within its 7-year Tarion warranty. North Oshawa is one of Durham's fastest-growing build areas. C-NRPP certified test at or above 200 Bq/m³ triggers builder-funded mitigation up to $50,000.
Is Oshawa's GM and industrial legacy a factor in radon?
No. Radon is a naturally occurring radioactive gas from uranium decay in soil and bedrock, not an industrial emission. Oshawa's automotive and steel-finishing legacy is a real but separate environmental concern (soil contamination, legacy paint). Radon levels depend on local geology, foundation type, and ventilation, not industrial history.
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 "Oshawa ~6%" 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.