Mississauga’s stormwater system does not include water treatment like the sanitary sewer system. Everything that goes into the storm sewer system ends up in the natural environment.
Rainwater and melted snow from roads and properties goes into catchbasins and local creeks that flow to Lake Ontario. Mississauga and other communities take our water for drinking and other uses from Lake Ontario. So preventing stormwater pollution from entering the lake is very important.
Stormwater runoff should be made up of only rainwater and melted snow. It can be easily polluted by substances like:
If these pollutants mix with the stormwater runoff as it flows across driveways, properties and roads into catchbasin inlets, these pollutants can quickly flow into local creeks before ending up in Lake Ontario.
We all can help to reduce stormwater pollution in our Great Lakes and protect our water and our community by:
Learn more about how the City is reducing stormwater pollution and protecting the City’s stormwater system.
If you’re a business owner, preventing pollution can help protect you from litigation, fines and expensive clean up costs.
Learn more about reporting and preventing spills.
The Storm Sewer Use By-law sets strict limits on what can be discharged into the stormwater drainage system. Any substance other than stormwater can harm the environment and damage the storm sewer system.
The by-law lists pollutants that can damage the natural environment and the storm sewer system. Private drainage systems typically connect to the City’s storm sewer system and must be maintained by the property owner. The pollutants listed in the by-law also apply to any private drainage system that discharges to the City’s system.
If an individual or a company violates the Storm Sewer Use By-Law, they can be liable for cleanup, repair costs and fines.
If you want more information, or if you’ve seen an act that may not comply with the by-law, please contact 311 (905-615-4311 outside City limits).