Best Radon Testing & Mitigation in Granby
About Radon in Granby, Quebec
Last updated: March 2026
Granby 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
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 1–15 of 15 professionals in Granby
Alerte radon Granby INC
Ventilation Moderne inc. is a C-NRPP certified radon testing and mitigation professional serving Granby, QC. They offer complete radon solutions from initial testing through to mitigation system installation.
Spheratest
Certified PNCR-C professional for radon gas services in Montréal, QC. Specializes in residential, commercial, and investor client needs.
Envirosol
Envirosol is an environmental consulting firm based in Sherbrooke and Saint-Georges, QC, doing site assessments, soil decontamination and percolation tests. It offers radon testing and mitigation in Estrie, Beauce, Bois-Francs, greater Montreal and Mirabel.
Climatisation Novatrix
Conçoit et installe des solutions HVAC performantes pour les projets de construction et rénovations résidentielles majeures. Effectue le nettoyage de systèmes de ventilation.
WSP
WSP is a C-NRPP certified radon testing professional serving Montreal, QC. Their certified inspectors provide accurate radon measurements for homes and businesses.
exp Services Inc.
exp Services Inc. is a C-NRPP certified radon testing professional serving Montreal, QC. Their certified inspectors provide accurate radon measurements for homes and businesses.
Renov-Action Michel Haineault Inc.
Renov-Action Michel Haineault Inc. is a C-NRPP certified radon mitigation professional serving Saint-mathias-sur-richelieu, QC. Their certified team installs sub-slab depressurization systems to reduce indoor radon to safe levels.
Radon Expert LM
Offers professional radon detection, measurement, and mitigation solutions. Licensed (RBQ 5821-5393-01) and PNCR-C accredited, using certified Radon X systems.
Roland Grenier Construction Ltee
Roland Grenier Construction Ltee is a C-NRPP certified radon mitigation professional serving Anjou, QC. Their certified team installs sub-slab depressurization systems to reduce indoor radon to safe levels.
Spécialistes Radon
Spécialistes Radon, based in Sherbrooke, tests homes for radon and installs sub-slab depressurization systems when levels exceed 200 Bq/m³. It also verifies existing systems and serves Magog, Coaticook and the rest of Estrie.
AtmoTest
AtmoTest is an indoor air testing company offering radon testing alongside mold, asbestos, humidity and air quality testing. Samples go to accredited labs and results are reported against Health Canada guidelines. It serves homeowners, buyers and businesses in greater Montreal and the South Shore.
Local radon data
How common is high radon in Granby?
1 in 6
homes in the Granby 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.
Postal areas nearby with the highest estimates
Estimate across 4 postal areas. Source: the RadonFinder.ca radon map of Canada, built on the 2024 Cross-Canada survey, Health Canada data and Statistics Canada census data.
Open Granby on the radon mapTest before you call a pro
Know your radon level in Granby 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.
Compare all detectors · As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Frequently Asked Questions: Radon in Granby
Browse Nearby Cities in Quebec
Other areas with radon professionals
Are you a radon professional in Granby? Claim and verify your free listing.
Learn more →Radon Resources for Granby
Tools and guides to help you understand radon risk and take action.