Systems Overview: Water, Sewer, Stormwater

mother and child at tap

The City of Markham is proud of its water distribution, wastewater collection, and stormwater management systems provided and maintained for our residents, businesses, and industries. Find out more about where our water comes from, what wastewater is and how Markham manages our stormwater below.

The City of Markham delivers clean, safe drinking water.

We’re proud to maintain our state of the art water distribution system. Through a system of pipes, valves, hydrants, pumping stations, and reservoirs, we deliver high quality, reliable drinking water to our residents, businesses, and industries. Learn where Markham’s water comes from and how it’s treated, tested for quality and delivered to your home.

What is Wastewater?

Wastewater is any and all water that is used in industrial, commercial or residential buildings that goes down a drain. Wastewater is produced through actions such as doing the laundry, taking a shower or even flushing a toilet. This water then flows into pipes specifically made for wastewater and enters Markham’s sanitary sewer system.

The City of Markham’s stormwater management system works hard to decrease flood damage as well as protect the natural environment, including Lake Ontario our drinking water source. Markham is continually working to make the stormwater management system better and more effective for our residents, businesses, and industries