Wastewater Treatment Master Plan

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The proper collection and treatment of wastewater has a direct impact on the health of London residents, our environment, and the ability of the City to grow and prosper.

Operating a wastewater treatment system often requires the upgrade of old facilities and the construction of new ones. By developing an informed plan for the next fifty years of wastewater treatment in London, the City will ensure that the improvements we make today will contribute to our long term goals, while planning ahead allows us to save money now to responsibly pay for future projects.

This study will look at the need for new and upgraded facilities as part of our commitment to environmental protection, growth servicing, and asset management. The City is seeking input as to the best ways to accomplish these goals.


Where does your wastewater go?

A map of five London's sewersheds.

London's wastewater travels to one of five wastewater treatment plants. Depending on where you live on the Sewershed Map, your wastewater will be pumped by a pumping station to either:

Learn more about Wastewater Treatment in London.


The proper collection and treatment of wastewater has a direct impact on the health of London residents, our environment, and the ability of the City to grow and prosper.

Operating a wastewater treatment system often requires the upgrade of old facilities and the construction of new ones. By developing an informed plan for the next fifty years of wastewater treatment in London, the City will ensure that the improvements we make today will contribute to our long term goals, while planning ahead allows us to save money now to responsibly pay for future projects.

This study will look at the need for new and upgraded facilities as part of our commitment to environmental protection, growth servicing, and asset management. The City is seeking input as to the best ways to accomplish these goals.


Where does your wastewater go?

A map of five London's sewersheds.

London's wastewater travels to one of five wastewater treatment plants. Depending on where you live on the Sewershed Map, your wastewater will be pumped by a pumping station to either:

Learn more about Wastewater Treatment in London.


  • Background Information

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    6 months ago

    The City of London currently operates five wastewater treatment plants and 38 pumping stations. The wastewater treatment plants are located along the Thames River.

    The Wastewater Treatment Plants use:

    • Screens and settling tanks to remove solids;
    • Bacteria to consume organic material and convert ammonia to nitrates;
    • Chemicals to remove phosphorous; and,
    • Ultra-violet light to disinfect.

    Material that does not pass through screens is removed and hauled to the landfill. In secondary treatment, bacteria are grown to break down organic material in the aeration section.

    Annual Wastewater Treatment Plant Reports for 2019

    The Southland Plant was shut down in March 2018 and now is a pumping station with flows directed to the Greenway Wastewater Treatment Plant.


    Municipal Class EA Process

    This study is being undertaken in accordance with the Municipal Class Environmental Assessment process (MEA, 2000 as amended in 2007, 2011, and 2015). The Environmental Assessment study will be completed in keeping with the Ontario Environmental Assessment Act, and will follow the Master Planning Process of the Municipal Engineers Association. For details on this process, please refer to www.municipalclassea.ca