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R.C.Harris Water Treatment Plant
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About – R. C. Harris Water Treatment Plant


RC Harris Treatment PlantWhere does the water come from?
One of four City water treatment plants, the R.C. Harris takes raw water from Lake Ontario, then cleans, disinfects and converts it into safe potable/drinking water for pumping into the City’s distribution system.

Fast facts about the R.C. Harris

  • Located at the foot of Victoria Park Ave.
  • Constructed in the 1930s
  • Named for Rowland Caldwell Harris, Commissioner of Works from 1912 to his death in 1945
  • Began operating on November 1, 1941
  • Declared a national historic civil engineering site in 1992
  • Remains Toronto’s largest water treatment facility
  • Operates 24/7 in an environmentally responsible and cost-efficient manner
2007 Statistics
Water production 168,000 million litres
Percentage of total water produced 33%
Number of days operated 365 days
Average daily production 453 million litres
Maximum daily production 758 million litres

Part of the east end community
Similar to Toronto Water’s other treatment plants, the R.C. Harris is built along the shoreline of Lake Ontario and integrated into the local neighborhood.

One way the City and the neighborhood stay in touch is through the Public Advisory Committee (PAC). Committee members play an important role in the community and advise City staff on plant issues.

The City also publishes a community newsletter called R.C. Harris Times, featuring current and local topics related to the plant. Public meetings on proposed changes to the site provide other opportunities for the City to connect with community issues.

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