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Wastewater Treatment Plant

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WWTP Aerial viewLocated just East of the city and directly across the South Saskatchewan River from Police Point Park, the City of Medicine Hat Wastewater Treatment Plant was originally constructed in 1961. The Wastewater Treatment Plant has had major upgrades to move from a system that ran solely on lagoon treatment to the advanced treatment process that we have today.

The plant is staffed with highly trained and certified operators 365 days a year, operating sophisticated systems within the facility and lab operations to ensure that the effluent discharged into the South Saskatchewan River is treated to the highest standards.

The Wastewater Treatment Plant is designed to treat 36,565 m3 per day with a peak flow capacity of 74,000 m3 per day. The current average daily flow of wastewater into the plant is approximately 26,000 m3 per day, with the average daily peak flow being 48,000 m3 per day.

Wastewater Treatment Plant History


  • Existing 5 lagoons (now referred to as storage ponds) constructed to provide treatment for the city’s wastewater.


  • Upgrades to the lagoons by adding aeration to lagoons 1-4. Final effluent from the lagoons at this time was discharged to the South Saskatchewan River from the North end of #5 lagoon.


  • A primary treatment plant was constructed upstream of the lagoons.
  • The lagoons became the secondary treatment for the wastewater.


  • A secondary treatment phase added to include:
    • Trickling filters
    • Solids contact process
    • Phosphorous removal
    • Chlorine disinfection


  • Two Ultraviolet reactors added, to replace Chlorine disinfection, with room for a third reactor when required as Medicine Hat grows in population.
  • Lagoons now only serve the purpose of storage ponds before discharging the effluent to the South Saskatchewan River.


  • Laboratory upgrades completed