In Canada's largest city, raw sewage flows into Lake Ontario so often, Toronto tells people they should never swim off the city's beaches for least two days after it rains. Across the country in Mission, B.C., a three-decade-old pipe that carries sewage under the Fraser River to a treatment plant in Abbotsford is so loaded operators can't even slip a camera inside it to look for damage. If that pipe bursts, it will dump 11 million litres of putrid water from area homes and businesses into a critical salmon habitat every day it isn't fixed.