Improper Stormwater Connections

What Is an Improper Connection?

An improper connection occurs when eavestroughs or sump pumps discharge into the sanitary (sewage) system instead of an approved outlet.

Is This Allowed?

No. These connections are not permitted and violate municipal by-laws and property standards.

Why Improper Connections Are a Problem

The sanitary sewer system is designed to carry wastewater from homes and businesses - not rainwater or groundwater. When extra water enters the system:

• Treatment facilities must process water unnecessarily
• Infrastructure becomes overloaded during heavy rain
• Sewer backups and flooding become more likely
• Operating costs increase, which can raise water and sewer bills

Cost Implications

Even though rainwater is clean, it must still be treated once it enters the sanitary sewer system. This increases municipal costs and contributes to higher utility rates for all users.

What Property Owners Should Do

Ensure that all eavestroughs and sump pumps are properly disconnected from the sanitary sewer system and redirected to an approved discharge location.

Acceptable Alternatives

• Downspout extensions directed onto lawns or gardens
• Splash pads or rain barrels
• Sump pump discharge to surface drainage, ditch, or storm sewer (where permitted)
• Rain gardens or other infiltration solutions

If you are unsure about your property’s connections, contact municipal staff for guidance.