Environment Canada says the town was fined after it pleaded guilty to two offences under the Fisheries Act in provincial court in Grand Falls-Windsor, N.L., on Tuesday.

A surge in pool and hot tub sales and inexperienced owners is suspected to be a contributing factor in a surge in poison centre calls.

Responsible Distribution Canada says large cities and municipalities could run out of chlorine, needed to treat drinking water, within in a week or two as rail blockades continue.

Fire officials in Massachusetts say the chemical reaction involved a powerful cleaning agent known as Super 8.

The Prohibition of Chemical Weapons investigated the April 7, 2018 attack that killed more than 40 people.

Officials say the incident was isolated to a specific room and the source was not chlorine from the pool.

'The initial cause of the leak remains under investigation,' fire said. 'The building has been turned back over the facility staff.'

Chlorine addition called a precautionary measure by town.

The Mill Woods Recreation Centre was evacuated Saturday morning because of a significant chlorine leak. 

Nikki Haley accused Russia of protecting Syrian President Bashar Assad from responsibility for what she said were multiple chlorine gas attacks on civilians in recent weeks.