Bottled water is now an environmental no-no. Luckily, Canadians have long been fortunate in that our tap water is regulated and that water providers must meet guidelines for allowable concentrations of contaminants. In fact, as far as water-treatment researcher Pierre Bérubé of the University of British Columbia is concerned, water that meets those guidelines should make buying a home filtration system unnecessary. But for those who still worry, or who believe that a filter improves tap water’s taste, here’s a roundup of some of the available options.