Winnipeg drinking water path

• Source & supply

  Shoal Lake

  Shoal Lake water flows by gravity through the Shoal Lake Aqueduct (completed 1919) into Deacon Reservoir storage, then through the treatment plant and on to regional reservoirs and pumping stations that feed the city distribution network.

  Winnipeg still relies on the century-old Shoal Lake aqueduct as its sole municipal source; Deacon Reservoir can hold roughly a month of supply for aqueduct maintenance and summer peaks.

• Treatment

  Winnipeg Water Treatment Plant (Deacon)

  Opened December 2009 at Deacon Reservoir east of the city; design capacity about 400 million litres per day. Processes include dissolved air flotation, ozonation, filtration, and ultraviolet disinfection.

  Treatment on record: UV · filtration

• At the tap

  Hardness 151 mg/L (Hard)

  Grade C (Fair)

  pH 7.9 · lead 0.7 μg/L

  ECCC / municipal open data (seed)