Canadian National Railway (CN) carried out a herbicide application on tracks that run alongside residential houses in the Mercier–Hochelaga-Maisonneuve neighbourhood of Montreal in July 2026. The operation was conducted without prior notification to the local community, prompting a wave of complaints from residents who said they were not informed about the chemical treatment near their homes.
The herbicide was applied as part of CN's routine weed‑control program, aimed at managing vegetation along its right‑of‑way. While the railway company regularly performs such maintenance to keep tracks clear and safe, the proximity of the treated area to private dwellings in this instance drew particular attention. Residents reported concerns about potential exposure to chemicals and the lack of communication from CN regarding the timing and scope of the spray.
Local homeowners described the situation as unexpected, noting that they had not received any notices or warnings before the herbicide was dispersed. The absence of prior information led to heightened unease among those living near the tracks, with several neighbours voicing their dissatisfaction to the railway operator.
CN acknowledged that weed‑control activities are a standard part of its operational responsibilities and that the treatment was intended to maintain the railway corridor. The company has not released details about the specific herbicide used or the exact locations where the spray was applied, but it confirmed that the action was taken to manage vegetation that could otherwise interfere with rail operations.
The incident underscores the tension that can arise when infrastructure maintenance intersects with residential areas. As the Mercier–Hochelaga-Maisonneuve community continues to monitor the situation, the episode highlights the importance of clear communication between large transportation entities and the neighbourhoods they serve.