Environmental Noise Studies for MELCCFP Authorizations in Quebec

Industrial, commercial, agricultural, and institutional facilities in Quebec require an authorization from the ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP) for a new facility and for any expansion, equipment replacement, or change in operation that increases sound emissions. To obtain it, the project must be designed so that sound levels at nearby dwellings, schools, health establishments, and other sensitive locations meet the applicable limits. An environmental noise study demonstrates that the sound levels resulting from the design meet these limits, and forms part of the authorization file.

Quebec Environmental Noise Regulations for Industrial Facilities

Most facilities are subject to the ministry’s environmental noise guidelines, the Lignes directrices relatives à la gestion du bruit environnemental, in force since January 2026. The guidelines specify the limits, the locations where they apply, and the method for measuring and predicting sound levels. The limit depends on the type of location exposed to the sound.

The limits apply to the sound from the facility alone and exclude the background sound already present at the location. Where background sound from road traffic is higher than the limit, the traffic level becomes the limit: for a facility near a busy road in a residential area, for example, the sound levels it produces are assessed against the traffic noise rather than against the limit of 45/40 dBA. Measuring background sound at the outset therefore establishes the actual target noise limit for the project.

A few sectors are subject to their own regulation, and others to specific distances under the guidelines. Each sets its own limits, periods, and the distances within which a study is required.

Despite their different names and content, the noise limits in these regulations are consistent with the limits of the environmental noise guidelines. In every case the environmental noise study accompanies the application.

Environmental Noise Study for Facility Authorization

A compliant study typically includes the following work:

• Facility and site information — Sonvera requests the equipment list with operating schedules, the site plan, any existing authorization, and any previous noise study
• Background sound measurements — Sonvera measures existing sound levels at the sensitive locations over the facility’s operating hours, including night hours
• Existing equipment measurements, where equipment is already in place — Sonvera measures the sound emissions of each source individually, separating the facility’s contribution from the background, and takes additional measurements around the facility as an independent check on the results
• Acoustical modelling — sound levels at each sensitive location are predicted using specialized software, with noise contour maps of the surrounding area
• Noise control design, where required — Sonvera works with the project team to identify the most appropriate noise control measures, from equipment selection and placement to treatment of the individual sources, selected for what can realistically be implemented within the operating, maintenance, and safety constraints of the facility

The result is a report built to satisfy the ministry’s requirements and ready for the authorization file. Once the facility is in operation, a noise survey establishes the sound levels actually produced.