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Compliance limits drive upgrades to the Orillia Wastewater Treatment Centre

Posted on Wednesday June 08, 2016
Waste Water Treatment Centre
Element of the Waste Water Treatment Centre

For immediate release (June 8, 2016) – The City of Orillia will be completing significant upgrades to its Wastewater Treatment Centre (WWTC) over the next year-and-a-half in order to reduce the amount of phosphorus entering into Lake Simcoe.

As required by the Lake Simcoe Protection Act, new compliance limits for phosphorus entering Lake Simcoe came into effect in June 2015. Tertiary treatment and process optimization at the WWTC are required to ensure the City’s annual average of phosphorus can be achieved with consistency under increased flow and higher total phosphorus concentrations.

On Monday, June 6, Council approved the prequalification of nine contractors to submit tender proposals this summer for the $15.5 million project. The City will be looking for potential funding opportunities from different levels of government to assist with the cost of this project.

“Tertiary treatment and process optimization of our WWTC is a project required by provincial legislation. It is our hope that an infrastructure project of this magnitude will be eligible for funding through Infrastructure Canada as announced in the federal government’s 2016 budget,” said Mayor Steve Clarke. “As soon as an application process becomes available, the City of Orillia will certainly apply.”

More than 95 per cent of the detailed design, drawings and tender specifications for the project have been completed by CIMA Canada Inc. and reviewed by the City of Orillia project team. It is anticipated the tender will be awarded in late summer 2016 with completion of the project by the end of 2017.

The project involves design and construction of a new cloth media tertiary filtration process, complete with a hydraulic lift station, cloth media filters and buildings to house the individual processes. Appurtenances associated with these processes include: chemical dosing system, chemical storage, boiler and HVAC systems, piping, electrical, controls and instrumentation equipment to facilitate phosphorus removal. The WWTC upgrade will include the retrofit of the aeration process equipment, as well as the construction of a new blower building for optimization of the WWTC processes, including automation, energy efficiency and ammonia nitrogen removal.

The City of Orillia is a city of 31,000 people in the heart of Ontario’s Lake Country on the shores of Lake Couchiching and Lake Simcoe. Visit our website at


Andrew Schell
Director of Environmental Services

Jennifer Ruff
Manager of Communications

© City of Orillia, 50 Andrew Street South, Suite 300, Orillia, Ontario, L3V 7T5, Tel: (705) 325-1311, Fax: (705) 325-5178, Email:

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