Mississauga Urges Homeowners to Clear Storm Drains Ahead of Spring Rainfall
Spring flooding prevention tips from Mississauga encourage homeowners to clear drains and maintain sump pumps
MISSISSAUGA — As spring rainfall increases across the Greater Toronto Area, the City of Mississauga is encouraging homeowners to take preventative steps to reduce the risk of flooding on private property.
In a public advisory released Friday, the City reminded residents that homeowners are responsible for keeping storm drains and drainage systems on their own property clear and functioning properly.
Municipal officials say blocked drains, clogged catch basins and poorly maintained drainage areas can contribute to localized flooding during heavy rain events.
“Small actions can make a big difference,” the City stated in the advisory.
Understanding stormwater and wastewater systems
The City is also reminding residents about the difference between:
- Stormwater systems
- Wastewater systems
Stormwater includes rainwater and melted snow flowing from rooftops, roads and driveways. Mississauga maintains the public stormwater system that carries this water into local waterways and Lake Ontario.
Wastewater, meanwhile, comes from household plumbing systems such as:
- Toilets
- Sinks
- Showers
- Washing machines
Peel Region manages wastewater collection and treatment infrastructure.
Did you know that homeowners are responsible for keeping the drains, catch basins, and swales on their private property clear?
Small actions make a big difference in preventing costly property damage.
Here is how you can keep your home flood-ready:
– Clear leaves, debris, and… pic.twitter.com/zFhgSLp3yC— City of Mississauga (@citymississauga) May 22, 2026
Homeowners asked to inspect backyard drains and swales
Mississauga officials are urging residents to inspect:
- Backyard storm drains
- Catch basins
- Swales
- Sump pumps
- Drainage pipes
The City says storm drains on private property often resemble municipal street drains and may be located in:
- Backyards
- Reverse-grade driveways
- Low-lying drainage areas
Officials warn that drains can become hidden under:
- Leaves and debris
- Landscaping
- Garden structures or sheds
Pooling water in yards may indicate blocked drainage infrastructure.
Residents are advised to:
- Check low points on their property
- Remove leaves and debris
- Ensure water can flow freely into drainage systems
Landscaping changes can increase flood risks
The City is also cautioning homeowners to consider drainage impacts before making landscaping changes such as:
- Installing swimming pools
- Adding retaining walls
- Altering yard grading
Improper grading modifications can interfere with natural water flow and increase flood risks for both homeowners and neighbouring properties.
Municipal officials recommend seeking professional guidance before making major drainage or landscaping changes.
Sump pump maintenance remains critical
Mississauga also highlighted the importance of maintaining residential sump pumps ahead of heavy rain events.
Homeowners are encouraged to:
- Clean sump pumps regularly
- Inspect discharge pipes
- Ensure systems are operating correctly
The City recommends directing downspouts and eavestrough runoff at least one metre — or approximately three feet — away from building foundations to reduce basement flooding risks.
Flood prevention resources available
Mississauga says residents can access several flood prevention resources online, including:
- Residential flood prevention guides
- Rain-ready home information
- Stormwater system education tools
- Basement flooding prevention rebates
- Flood resilience rebate programs
Additional information about stormwater infrastructure and flood prevention programs is available through the City of Mississauga’s official website.
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