Ashbridges Bay Treatment Plant

Located at 9 Leslie Street in Toronto’s east end, Ashbridges Bay is one of Canada’s largest and oldest wastewater treatment plants.

Highland Creek Treatment Plant

Located at the mouth of Highland Creek, the plant is at 51 Beechgrove Drive in the Scarborough community of West Hill.

Humber Treatment Plant

The City’s second largest wastewater treatment plant, located at 130 The Queensway, near the mouth of the Humber River.

  • Located on 41 hectares
  • Serves a population of approximately 680,000
  • Has a capacity of 473,000 m³ per day
  • Began operating in 1960
  • Annual reports:
  • Plant bypass information

North Toronto Treatment Plant

Situated in the Don Valley at 21 Redway Road.

  • Located on 22 hectares
  • Serves a population of approximately 55,000
  • Has a capacity of 34,000 m³ per day
  • Began operating in 1929
  • Annual reports: