Toronto Public Health officially determined that a TTC cooling tower is the main origin of a Legionnaires' disease outbreak in Toronto. Public health teams issued a detailed health bulletin establishing the cooling tower as the initial source of the regional illness outbreak.

Multiple news outlets including CBC, Global News, Toronto Star, and SSBCrack shared the confirmation from public health officials. The official announcement formally designated the TTC cooling tower as the underlying origin of the health emergency in Toronto. Public health officials stated that the TTC cooling tower remains the identified source of the disease cases.