Learn more about where our water comes from, what wastewater is and how stormwater is managed.

In Markham, we value our environment and natural resources. Our stormwater management activities help us protect our region. Through good management, we protect: Streams Rivers Lakes Fisheries Natural...

FREQUENTLY ASKED QUESTIONS What is Stormwater Management? Stormwater management is a municipal service that includes the transport and treatment of rainwater and snow melt that runs off our...

Stormwater management facilities, or stormwater ponds, have been used to control stormwater from urban areas in Markham since the late 1980s, intended to ensure that new development does not increase or change the conditions for downstream landowners.