The City of Markham's sanitary sewer system collects and moves domestic/industrial wastewater to the Duffin Creek Wastewater Pollution Control Plant located in Pickering, Ontario.

There are pipes throughout your home that only collect wastewater. These pipes are a homeowner's responsibility. They include the drains leading from kitchen sinks, toilets, and showers. Keeping these pipes free of debris - like hair or grease - keeps them functioning properly.

The section of pipe that runs beneath your home to the property line is also a homeowner's responsibility. If that section of pipe gets clogged with large objects being flushed down a toilet, by a large amount of grease buildup, or by tree roots on your front lawn, it is the homeowners' responsibility to have it cleared out.

Remember, sinks and toilets are not a garbage can. Please dispose of diapers, large objects, hair and grease into the garbage or the green bin and not into the wastewater system. Backups are most commonly caused by items that should never be flushed down the toilet or poured down the drain.

City of Markham Waterworks System Illustration