By CBC News Ottawa, November 4, 2017
Fish in the Rideau Canal are being tested for PCBs, mercury and other heavy metals, the federal environment ministry has confirmed.
On Thursday, Parks Canada listed a downtown stretch of the waterway as a contaminated area.
The Ministry of the Environment and Climate Change is testing fish collected over the summer from Dow's Lake, as well as from three locations on the Rideau River and five on the Ottawa River, spokesman Gary Wheeler told CBC News in an email.http://www.cbc.ca/news/canada/ottawa/rideau-canal-tested-1.4387734