Three years after more than a dozen people fell ill from bacteria buildup in cooling towers in industrial buildings in the city of Moncton, New Brunswick introduced a bill mandating the licensing and maintenance of them, according to a report.

The potential bacteria buildup in industrial cooling towers can lead to Legionnaire’s disease, a severe form of pneumonia. Sixteen people caught the disease in 2019. Some were placed in medically induced comas to help them recover, which led to calls for more regulation.

Health Minister Dorothy Shephard introduced the bill in late March. New Brunswick is one Canada’s 10 provinces and one of the three Maritime provinces.