Canadian National Railway (CN) applied a herbicide on railway tracks that run alongside a residential neighbourhood in Mercier–Hochelaga-Maisonneuve on Saturday evening, without notifying the nearby inhabitants. The spraying took place at 18:43:34 EDT on 18 July 2026 and prompted a wave of complaints from residents who said they were not warned about the chemical treatment.
The herbicide application formed part of CN’s routine weed‑control program, which the company regularly carries out across its rail network to manage vegetation that could affect track safety and operations. In this instance, the treatment was conducted on a section of track that lies directly adjacent to homes in the Mercier–Hochelaga-Maisonneuve district of Montreal, Quebec.
CN’s standard practice involves periodic spraying of herbicides to keep weeds from encroaching on rail corridors. While such operations are common, the proximity of the treated area to private residences distinguishes this case from typical maintenance activities. The lack of prior notification to the community has been cited as the primary source of dissatisfaction among local residents.
Following the spraying, several members of the neighbourhood lodged formal complaints with the railway operator, expressing concern over the unexpected exposure to chemicals near their homes. The complaints have been recorded by CN’s customer‑service channels, and the company has acknowledged receipt of the feedback.
The incident adds to the ongoing dialogue about the balance between rail infrastructure upkeep and the health and safety expectations of adjacent communities. CN’s routine weed‑control program remains a core component of its operational safety strategy, but the event underscores the importance of communication protocols when activities intersect with densely populated urban areas.