On Thursday, September 24, 2026, the Public Health Agency of Quebec issued a warning that the City of Montreal had underestimated health hazards linked to the Pierre‑Bédard sponge park, a facility designed to receive a blend of stormwater and wastewater.
The agency’s statement highlighted that the park will handle combined rainwater and sewage, a configuration that could create potential health impacts, according to the agency.
Montreal had earlier announced the sponge park as part of its water‑management strategy, aiming to improve the handling of stormwater and wastewater through a “sponge” approach. The public health authority says the city’s assessment of associated risks was insufficient.
The provincial health agency emphasized that mixing sewage with stormwater can increase exposure to pathogens and other contaminants, raising concerns for residents and workers near the site. The agency called for a reassessment of the park’s design and operational protocols.
The criticism comes as the city moves forward with the project, which is intended to mitigate flooding and enhance water quality. The health agency’s warning suggests that additional safeguards may be required before the park becomes operational.
No further details on remedial actions have been provided by the city at this time. The public health agency indicated it will continue to monitor the situation and engage with municipal officials to address the identified hazards.