Emergency crews tended to an ammonia leak at Maple Lodge Farms in Brampton on Sunday, officials say.
Crews were called to the facility, located near Winston Churchill Boulevard and Steeles Avenue West, at 8:16 a.m.
Peel police said there was an ammonia leak and the building was evacuated. No injuries were reported.
Brampton Fire Services tweeted that they were on scene at the facility and worked to identify and isolate the leak.
Police initially asked everyone within one kilometre of the facility to remain indoors. As of mid Sunday afternoon, officers said there was no longer a threat to public safety, but the plant would remain closed.
According to the Canadian Centre for Occupational Health and Safety, ammonia is a colourless gas used to make plastics, as a fertilizer, and as a refrigerant, among other applications.
It can be very toxic if inhaled.