Untreated sewage can end up in our waterways in multiple ways. Combined sewer overflows (CSOs) are one major source, where wastewater and stormwater flow together during heavy rainstorms. This outdated form of infrastructure needs to be replaced. As a result, the Our Living Waters Network is tracking how many CSO locations exist across the country and how many municipalities have them.
Any reduction in the number of these locations will make a significant and measurable difference in the amount of untreated sewage that ends up in our water bodies.
5-Year target: to report on this measure, and see a reduction in the number of CSO locations in Canada. The ultimate goal is that no CSOs exist in the country.
Last updated March 2018