City
Radon levels in Montréal homes from the 2024 survey, and C-NRPP certified testing and mitigation providers with a business address in Montréal, dated.
Photo: Thomas1313, CC BY-SA 3.0, cropped, via Wikimedia Commons.
17.4
%Share of properties in the Montréal Metro Area reporting unit with radon at or above 200 Bq/m³ in the 2024 Cross-Canada Radon Survey.
3
Businesses with a business address in Montréal and at least one active C-NRPP credential, as of 2026-10-18. Providers based elsewhere may also serve Montréal.
Survey figures for the Montréal Metro Area reporting unit
| Measure | Value |
|---|---|
| Properties below 100 Bq/m³ (%) | 54.7 |
| Properties from 100 to 199 Bq/m³ (%) | 28 |
| Properties at or above 200 Bq/m³ (%) | 17.4 |
| Geometric mean (Bq/m³) | 88.7 |
| Geometric mean, weighted by building type (Bq/m³) | 82.4 |
| Highest observed (Bq/m³) | 14,652 |
| Sample | population 4,291,732 (2021 Census); approximately 2,500+ properties with radon data |
2024 Cross-Canada Survey of Radon, Version 1.1 (CCSR.24.1.1), section XI, Table of Metropolitan Areas, page 39
Sorted alphabetically by business name. Every C-NRPP certified business is listed free, and payment never affects the order.
C-NRPP
Service area
Not stated by the provider
Last registry check
C-NRPP
Service area
Not stated by the provider
Last registry check
C-NRPP
Service area
Montreal
Last registry check
Grant · Danville, Dixville, Ham-Sud, Petite-Rivière-St-François, Plessisville, St-Valérien, Varennes, Victoriaville
Radon is named as eligible. Current. As of 2026-09-18.
Grant
Up to $1,500 toward home radon mitigation. Radon is named as eligible. Current. As of 2026-09-01.
Grant
Up to 95% of recognized cost to a maximum of $20,000, raised to $25,000 for households at or below the applicable income level. Radon eligibility not verified. Open; intake varies by MRC.. As of 2026-09-18.
Rebate or reimbursement · Vaudreuil-Dorion
50% of installation, maximum $500 per residence, plus $5 detectors. Radon is named as eligible. Current for 2026.. As of 2026-09-18.
Free or subsidized testing
Radon is named as eligible. Current. As of 2026-09-18.
Province or territory
Radon by census division, and every certified provider in Quebec.