Calgary will hold yet another plebiscite on whether to restore fluoride to the city's drinking water this fall. Council voted 10-4 in favour of allowing the electors to decide the issue on Monday. It will be put to the public during the 2021 municipal election in October. Council chose to stop adding fluoride to its water supply in 2011, against the opinion of Calgarians who had voted in favour of fluoridation in 1998 and 1989 plebiscites. The city has held plebiscites on the issue dating back to the 1950s.