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Milton radon testing and mitigation

132,979 residents. ~1 in 10 homes test above the Health Canada radon guideline.

Population
132,979 1
Total Homes
42,825 1
Above Safety Guideline
~1 in 10 homes 2
~10% of homes
Homes Above Guideline
~4,300 2
Estimated count

Why Milton homeowners test

Milton was Canada's fastest-growing town through the 2010s, which means most homes are post-2005 builds with airtight modern envelopes. Sitting on the Niagara Escarpment with dolostone bedrock similar to Burlington, Milton has elevated baseline radon that gets trapped efficiently by new construction. Worth testing despite the newer housing stock.

Our Milton 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

Milton-specific questions

Do you service all of Milton?

Yes. Every Milton neighbourhood including Bronte Meadows, Coates, Beaty, Willmott, Scott, Harrison, Ford, Cobban, downtown Milton, and the rural Halton Hills areas adjacent. Same $99 testing price, no distance surcharge. Milton is roughly 30 minutes from our Guelph base.

Most Milton homes are new builds. Does newer construction mean lower radon risk?

Not in Milton. Newer homes are often more airtight, which can actually trap radon more effectively than older draftier homes. Combined with Milton's location on the Niagara Escarpment (which has elevated bedrock uranium), Milton's post-2005 subdivisions can produce surprisingly high readings. We have tested 8-year-old Milton builds in Bronte Meadows and Willmott with results above 200 Bq/m³.

My Milton home was built post-Feb 2021. Does Tarion cover radon mitigation?

Yes, and this matters more in Milton than almost anywhere in the GTA. Milton has one of the largest inventories of Tarion-eligible new builds in Canada (entire subdivisions like Cobban, Ford, and Harrison were built post-2021). If a C-NRPP certified test reads at or above 200 Bq/m³, your builder is required to fund mitigation up to $50,000. Most Milton new-build owners we test for had no idea this coverage existed.

Why does Milton have higher radon than Mississauga or Brampton?

Milton sits directly on the Niagara Escarpment, the same dolostone bedrock formation that elevates radon in Burlington and Hamilton. Mississauga and Brampton sit on glacial till that buffers bedrock radon emission. Milton's escarpment proximity means more soil-gas radon entering foundations, and modern airtight construction means more of it stays inside. The combination puts Milton's average around 70 Bq/m³, higher than the central-GTA average.

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 "Milton ~10%" 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. 1.Statistics Canada. Census Profile, 2021 Census of Population (2022)
  2. 2.Evict Radon. Evict Radon National Study
  3. 3.Health Canada. Government of Canada Radon Guideline
  4. 4.Health Canada. Cross-Canada Survey of Radon Concentrations in Homes: Final Report (2012)
  5. 5.Canadian Association of Radon Scientists and Technologists (CARST). Take Action on Radon

See our full research bibliography at /sources.