Best Radon Testing & Mitigation in Thetford Mines

About Radon in Thetford Mines, Quebec

Last updated: March 2026

Thetford Mines is served by C-NRPP certified radon professionals listed on RadonFinder.ca. Quebec's radon risk is concentrated in regions underlain by the Grenville geological province, including the Laurentians, Eastern Townships, the Outaouais, and parts of Mauricie, where uranium-bearing gneiss and granite produce elevated soil gas. The Montreal urban area, sitting on the St. Lawrence Lowlands, generally shows lower levels. Quebec has a high proportion of older housing stock in cities like Quebec City and Trois-Rivières, and older construction with block foundations and open sump pits tends to allow more radon entry.

Typical Mitigation Cost in Quebec

$2,200–$3,600

Near national average

Montreal-area labour rates apply in the urban corridor; rural and Laurentian regions may see higher costs due to contractor travel.

  • •Foundation type: block, poured concrete, or stone foundations in older Quebec homes
  • •Open sump pits and floor drains as radon entry points
  • •Finished vs. unfinished basement: finishing adds pipe-routing complexity
  • •Bilingual service availability in some rural areas
  • •Age of home: pre-1980 homes often require more sealing work

Showing 1–1 of 1 professional in Thetford Mines

Protection Radon Québec

Thetford Mines, QC

Protection Radon Québec measures and reduces radon levels in homes and workplaces, offering radon testing, mitigation and post-mitigation follow-up testing. Based in Thetford Mines, it serves clients throughout Quebec.

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Local radon data

How common is high radon in Thetford Mines?

Moderate

1 in 6

homes in the Thetford Mines area are estimated to have radon above Health Canada's action level of 200 Bq/m³. Your home can be very different from its neighbours, so the only way to know your level is to test.

Thetford Mines
1 in 6
Quebec
1 in 5.3
Canada
1 in 5.6

Postal areas nearby with the highest estimates

Estimate across 1 postal area. Source: the RadonFinder.ca radon map of Canada, built on the 2024 Cross-Canada survey, Health Canada data and Statistics Canada census data.

Open Thetford Mines on the radon map

Test before you call a pro

Know your radon level in Thetford Mines first

A home monitor tells you whether you need mitigation at all, and later confirms it worked. Health Canada bases decisions on a 3-month average, ideally through winter.

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Frequently Asked Questions: Radon in Thetford Mines

RadonFinder.ca lists C-NRPP certified radon testing and mitigation professionals serving Thetford Mines, Quebec. Browse the directory above to compare professionals by services offered, certifications, and reviews.
Most homeowners in Quebec pay between $2,200 and $3,600 for a complete radon mitigation system. Actual cost depends on your foundation type, home size, and the complexity of the installation. Request quotes from multiple professionals to compare.
Thetford Mines follows Health Canada's national guideline of 200 Bq/m³. If your home tests above this level, Health Canada recommends taking action to reduce radon within two years for levels between 200 and 600 Bq/m³, and within one year if above 600 Bq/m³.
Yes. Health Canada recommends testing every home in Canada, regardless of age, construction type, or location. Radon levels vary from house to house and even neighbouring homes can have very different readings. A long-term test of at least 91 days during the heating season is the most reliable method.
The most common system is active sub-slab depressurization (ASD). A certified professional installs a pipe through your foundation slab connected to a fan that draws radon from beneath the home and vents it safely above the roofline. Installation typically takes one day.

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Radon Resources for Thetford Mines

Tools and guides to help you understand radon risk and take action.

Check your radon risk
Estimate your risk based on province, home age, and foundation type.
Understand your test results
Learn what Bq/m³ means and when action is required.
DIY radon test kits
Compare test kit options starting from $10.
Radon guides & articles
In-depth guides on testing, mitigation, and health risk.
Radon map of Canada
See how common high radon is in your postal code.
Radon FAQ
Answers to the most common questions about radon.