Town
C-NRPP certified radon testing and mitigation businesses with an office in Havre-aux-maisons, Quebec, and the 2024 survey figure for its census division, dated.
Photo: Fralambert, CC BY-SA 3.0, cropped, via Wikimedia Commons.
20.5
%About 1 in 5 properties
Share of properties in the Communauté maritime des Îles-de-la-Madeleine census division, which includes Havre-aux-maisons, with radon at or above 200 Bq/m³ in the 2024 Cross-Canada Radon Survey. The survey reports no figure for Havre-aux-maisons itself.
1
Businesses with a business address in Havre-aux-maisons and at least one active C-NRPP credential, as of 2026-11-03. Providers based elsewhere may also serve Havre-aux-maisons.
Sorted alphabetically by business name. Every C-NRPP certified business is listed free, and payment never affects the order.
C-NRPP
Last registry check
Certified providers near Havre-aux-maisons
Businesses for hire with an active C-NRPP credential and an office within 50 km of Havre-aux-maisons, closest first. Each business is placed at the centre of its office’s postal code area and Havre-aux-maisons at the centre of its built-up area, so distances are approximate.
Sorted by distance, closest first. Every C-NRPP certified business is listed free, and payment never affects the order.
| Business | Town | Distance (km, approximate) | Services |
|---|---|---|---|
| Architecture Boudreau Inc. | L'Étang-du-Nord | 1 | Measurement |
C-NRPP, Find a Professional directory: every province and territory searched for each of the six service types, de-duplicated by the registry's person id. Pulled on 2026-11-03. Distances use Statistics Canada, 2021 Census forward sortation area, population centre and census subdivision boundary files, adapted; not an endorsement by Statistics Canada.
Laws, codes and decisions on radon that apply in Havre-aux-maisons
Each row names its instrument and status as the authority states it. Guidance is not law; a tribunal decision is not court precedent. Canada's 200 Bq/m³ guideline binds no homeowner.
| Rule type | Applies to | What it says | Instrument | Status | In effect from |
|---|---|---|---|---|---|
| Building code | Quebec | In 2021 the RBQ changed the Construction Code's maximum radon threshold from 800 to 200 Bq/m³, referring to Health Canada's level. The amendment added a vertical passive radon exhaust stack to the rough-in already required; the regulatory impact analysis describes a basic pipe infrastructure to be completed with a passive or active system if indoor radon exceeds the threshold. | Construction Code (Quebec), radon amendment announced 24 November 2021 | In force | 2021-11-24 |
| Real estate disclosure | Quebec | The seller's declaration form includes a radon line, and OACIQ publishes guidance on keeping radon from derailing a transaction. Quebec's civil law system differs from the common law elsewhere in Canada. | OACIQ seller declarations form (radon line); OACIQ guidance on radon in transactions | Guidance | no data |
| Rental housing | Quebec | Four Quebec tenancy decisions in which radon above Health Canada's guideline was held to breach the landlord's repair and habitability obligations. Tenancy tribunal decisions, not court precedent. | Barak c. Osterrath, 2012 CanLII 150609; Pickard c. Arnold, 2015 CanLII 129833; Bramley c. Vanwynsberghe, 2017 QCRDL 11313; Vanderwerf c. Dolan, 2019 QCRDL 37417 | Tribunal or court decision | no data |
Rules that apply across Canada are on the Quebec page.
The radon rules dataset; each row cites its primary source and the date checked.
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.
Free or subsidized testing
Running for 2025 and 2026 with a live community list by province. Most participating communities distribute free kits; some charge a low fee. Current. As of 2026-09-18.
Free or subsidized testing
Free long-term (91 days or more) alpha track test kit, mailed back for analysis. Current. As of 2026-10-27.
Province or territory
Radon by census division, and every certified provider in Quebec.
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