The Proposal

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.

Background Information

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 2018

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

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The City wants to hear from you

This Master Plan intends to consider the needs of all of London's residents and neighbours. A number of public meetings are being planned for 2020. If you would like to ask a question, make a comment, or recieve future email updates about this project, please contact us.

With the exception of personal information, all comments will become part of the public record of the study. The study is being conducted according to the requirements of the Municipal Class Environmental Assessment, which is a planning process approved under Ontario’s Environmental Assessment Act.

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NOTICE OF COLLECTION OF PERSONAL INFORMATION-The personal information submitted on this Get Involved page is collected under the authority of the Municipal Act, 2001, S.O. 2001, c. 25 and will be used to provide details and input regarding future Wastewater Treatment Master Plan supported events or activities. Questions about this collection of personal information can be emailed to Kirby Oudekerk, P.Eng at