Wastewater Treatment Operations Master Plan

Share on Facebook Share on Twitter Share on Linkedin Email this link

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 and expansion of existing facilities and the construction of new infrastructure. By developing an informed long term plan, the City will ensure that the wastewater infrastructure improvements we make today will effectively contribute to our long term goals.

This Master Plan will consider 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.

The first Wastewater Treatment Operations Master Plan virtual Public Information Meeting was held on April 22, 2021. You can download the presentation or watch a video of the virtual meeting.

The second Wastewater Treatment Operations Master Plan virtual Public Information Meeting was held on September 29, 2021. You can download the presentation or watch a video of the virtual meeting.

Where does your wastewater go?

A map of five London's sewersheds.

Wastewater travels to one of the City’s five wastewater treatment plants. Depending on where you are in the City, your wastewater will flow by gravity or be pumped by a pumping station within a sewershed to one of these treatment plants:

For assistance in reading these maps, to request them in alternate formats, or to ask questions, please contact Marcy McKillop, P.Eng. at mmckillo@london.ca


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 and expansion of existing facilities and the construction of new infrastructure. By developing an informed long term plan, the City will ensure that the wastewater infrastructure improvements we make today will effectively contribute to our long term goals.

This Master Plan will consider 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.

The first Wastewater Treatment Operations Master Plan virtual Public Information Meeting was held on April 22, 2021. You can download the presentation or watch a video of the virtual meeting.

The second Wastewater Treatment Operations Master Plan virtual Public Information Meeting was held on September 29, 2021. You can download the presentation or watch a video of the virtual meeting.

Where does your wastewater go?

A map of five London's sewersheds.

Wastewater travels to one of the City’s five wastewater treatment plants. Depending on where you are in the City, your wastewater will flow by gravity or be pumped by a pumping station within a sewershed to one of these treatment plants:

For assistance in reading these maps, to request them in alternate formats, or to ask questions, please contact Marcy McKillop, P.Eng. at mmckillo@london.ca


  • Background Information

    Share on Facebook Share on Twitter Share on Linkedin Email this link

    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.


    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


Page last updated: 07 October 2021, 11:03