У вас есть cвинцовые трубыhttp://healthydebate.ca/2016/03/topic/lead-drinking-waterhttp://globalnews.ca/news/2474102/lead-in-the-water-tens-of-thousands-of-canadian-households-still-have-toxic-pipes/https://www.thestar.com/news/gta/2014/05/20/water_quality_tests_data_shows_elevated_lead_levels_in_toronto_homes.htmlhttp://pondpine.blogspot.com/2007/05/ottawa-water-problem-lead-are-coming.html