New Wastewater Treatment Plant!

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The City of Molalla is currently in construction on a NEW WASTEWATER TREATMENT PLANT, here are some highlights:

  • Changes the treatment process from activated sludge lagoons to a sequencing batch reactor.
    • Increases treatment capacity to approximately 15,000 people.
    • Modular in nature for simpler and less costly expansion when needed.
  • Changes the lagoons from a treatment facility to clean water holding ponds.
    • Decreases risk of environmental hazards.
    • Increases options for recycled water re-use.
  • Changes the disinfection process from chlorine infusion to ultraviolet light.
    • Reduced carbon footprint.
    • Substantial cost savings on chlorine.
  • Want to Learn More?
    • Check out the FAQ section, or ask in the Questions section!

The City of Molalla is currently in construction on a NEW WASTEWATER TREATMENT PLANT, here are some highlights:

  • Changes the treatment process from activated sludge lagoons to a sequencing batch reactor.
    • Increases treatment capacity to approximately 15,000 people.
    • Modular in nature for simpler and less costly expansion when needed.
  • Changes the lagoons from a treatment facility to clean water holding ponds.
    • Decreases risk of environmental hazards.
    • Increases options for recycled water re-use.
  • Changes the disinfection process from chlorine infusion to ultraviolet light.
    • Reduced carbon footprint.
    • Substantial cost savings on chlorine.
  • Want to Learn More?
    • Check out the FAQ section, or ask in the Questions section!

  • Molalla WWTP Project Wins ACWA Award!!!

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    The City of Molalla Wastewater Treatment Team has been awarded a very distinguished, statewide award for their work on the new Wastewater Treatment Plant and other public engagement activities. This award is just another example of how Molalla is doing things the right way! Great work Wastewater Treatment Plant Team!

    The City of Molalla Wastewater Treatment Team has been awarded a very distinguished, statewide award for their work on the new Wastewater Treatment Plant and other public engagement activities. This award is just another example of how Molalla is doing things the right way! Great work Wastewater Treatment Plant Team!

Page last updated: 21 Apr 2026, 12:31 PM