The article insists most Canadians have access to water that is 'clean, fresh and safe'. Not sure the meaning of fresh, but the clean, safe claims depend on your point of view and your choice of scientific evidence. Health Canada has published the link between THPs (the by-product of chlorine) and cancer - the reduction of which it acknowledges can only be achieved with water treatment devices. While I rely on those for washing and showering, I use bottled spring water or boiled treated water for drinking. The reason for the abundance of caution relates not only to the THPs but to the fact that some microscopic pathogens survive the chlorine treatment. 

My GP doesn't tell clients not to drink the municipal water but he does tell them he encounters issues he suspects relate to residual biological and inert contaminants in tap water. With bottled spring water I am also able to select for a mineral profile that is considered healthy and that is not present in water from my tap.