At around 11:30 a.m., firefighters were called to Olin Chlor Alkali, a manufacturing facility that produces bleach, chlorine, hydrogen and hydrochloric acid.
Provincial police said it appeared a reservoir containing acid exploded, sending a cloud of yellowish smoke into the sky.
The company said no one was hurt.
“All site employees have been accounted for and are well. The [chlorine] release has been stopped and employees took immediate precautionary procedures. As another precautionary measure, neighbours of the facility were advised of the situation,” a company statement read.
One person, a pizza man, who was affected by fumes, was transported to hospital.
The explosion occurred in the industrial park area of Bécancour, along the Saint Lawrence River.
“At this time, we have no reason to believe this release presents any risk to anyone else or to the environment and we are still inspecting the area,” Olin’s statement said.
The plant has been in operation since 1974.