The Lakeshore Water Treatment Plant is the only surface water treatment plant in Innisfil. The plant treats water from Lake Simcoe before it is distributed to the 9,600 customers in Innisfil. The Lakeshore Water Treatment Plant also supplies Bradford West Gwillimbury with water. The plant’s rated capacity is 38,000 Cubic Meters per Day. In 2018 the plant was upgraded from a conventional treatment plant to a membrane filtration plant.
The Lakeshore Waste Water Treatment Plant has a rated capacity of 17,000 Cubic Meters per Day and provides wastewater servicing for 10,300 customers in Innisfil. The plant is an extended aeration treatment facility and discharges the treated effluent into Lake Simcoe. As part of the treatment process sludge is converted into a commercial grade fertilizer.
The Cookstown Waste Water Treatment Plant provides wastewater servicing for Cookstown. The plant is an extended aeration treatment facility with a rated capacity of 825 Cubic Meters per Day. The treated effluent is stored in two storage ponds located at the Cookstown WWTP site. The effluent from the storage ponds is discharged on a seasonal basis to Innisfil Creek.