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Water Treatment Plant

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Located on the same lot as the Power Plant and originally constructed in 1912, the City of Medicine Hat Water Treatment Plant has had numerous upgrades and expansions to accommodate new technology and forecasted water demand until the year 2025. You can find the Water Treatment Plant at 1502 Power House Road SW alongside the South Saskatchewan River.

The Water Treatment Plant is staffed 24 hours a day, 365 days a year. Through the use of sophisticated control systems and advanced instrumentation, the Water Treatment Plant ensures that every drop of water sent to our customers is 100% safe, 100% of the time. Dedicated and highly trained experts in the field continuously monitor and optimize the plant to ensure that the citizens of Medicine Hat receive the highest quality water.

Currently, the Water Treatment Plant is rated for a maximum output of 160 million litres of water per day, however in practice the maximum output is considered to be approximately 125 million litres per day to maintain high quality potable water.

During the winter months, the average plant effluent (discharge) is in the range of 25-30 million litres per day, whereas during the summer months this will increase to approximately 75-125 million litres per day. Essentially, as the outdoor temperature increases so does the demand for water typically used for sprinkler systems, outdoor pools etc.

Water Treatment Plant History

Plant History 19121912

  • Marks the initial construction of the Medicine Hat Power and Pumping Station. This structure, referred to as “1 Plant”, is still part of the facility today although it has been decommissioned.

Mid 1950’s

  • Solids Contact Unit #1 and two new filter beds installed in “2 Plant”.

Early – Mid 1970’s

  • Two additional Solids Contact Units, #2 and #3, constructed along with six additional filter beds in “2 Plant” and “3 Plant”.

Early 1980’s

  • Modifications made to the electrical system.
  • Increased chlorination capacity of plant.
  • First computer was introduced (Leeds and Northrup).
  • Additional pumps installed to meet increasing water demands within the city.

Plant History 19951995

  • New plant, “4 Plant”, constructed with design capacity of 74 million litres per day.
  • Additional Solids Contact Unit #4 with 6 modern dual media filter beds.
  • 5 vertical turbine pumps.
  • 6 million litre clearwell system.
  • Upgraded and additional chemical feed systems.
  • State of the art instrumentation and automation systems.
  • Upgraded all existing filters.

UV Disinfection System2008

  • “5 Plant” constructed with design capacity of 74 million litres per day.
  • Additional Solids Contact Unit #5 installed with 6 additional dual media filter beds.
  • New UV disinfection system installed in former secondary clearwell.
  • Additional 3.2 million litre clearwell built in 5 Plant.


  • 3 de-chlorination/residuals handling tanks and a raised road overland flood prevention berm constructed.
  • Sodium Bisulphate injection system to de-chlorinate the water that is returned to the South Saskatchewan River.

Plans for future upgrades include a treatment facility for solids process wastes generated during the water treatment process. Process wastes are currently discharged back into the river so this pre-treatment process is considered to be an essential component as regulated by Alberta Environment and Parks as well as for the long term sustainability and protection of the South Saskatchewan River Basin.