Cambridge radon testing and mitigation
138,479 residents. ~1 in 8 homes test above the Health Canada radon guideline.
Why Cambridge homeowners test
Cambridge sits on the same Lockport dolostone bedrock as Kitchener and Guelph, with similar elevated radon profiles. The historic Galt, Preston, and Hespeler cores include many 1800s and early 1900s stone homes where foundation permeability is high. Testing is recommended across all home types.
Our Cambridge 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
Cambridge-specific questions
Do you service all of Cambridge including Galt, Preston, and Hespeler?
Yes. Every Cambridge neighbourhood including downtown Galt, Preston, Hespeler, Blair, West Galt, North Galt, East Galt, Westgate, and the Grand River corridor. Same $99 testing price, no distance surcharge. Cambridge is roughly 15 minutes from our Guelph base.
Why is Cambridge's radon higher than the GTA average?
Bedrock geology, same as Kitchener and Guelph. Cambridge sits on Lockport dolostone with naturally higher uranium content than the glacial till underlying central Toronto, which means more radon emission into soil gas. Combined with Cambridge's housing stock that includes many 1800s and early 1900s stone-foundation homes in the historic Galt, Preston, and Hespeler cores, the regional 14% above-guideline rate is well-explained.
Which Cambridge neighbourhoods test highest for radon?
The historic cores (downtown Galt, Preston, Hespeler) include many pre-1950 homes with stone or rubble foundations and basement living space, conditions that favour radon accumulation. These tend to top the risk list. Newer subdivisions in West Galt and along the Highway 401 corridor test moderately but can still spike in individual homes due to airtight modern construction.
My Cambridge home is a recent build in West Galt or along the 401 corridor. 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. Cambridge's recent growth corridors are squarely in this window. With the regional 14% above-guideline rate, the Tarion claim path is especially worth knowing about. 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 "Cambridge ~14%" 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.