Region of Waterloo General Inquiries

Contact Information for General Inquiries
150 Frederick St., Kitchener, Ontario N2G 4J3

Phone: 519-575-4400
TTY: 519-575-4608

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Wastewater, also called sewage, is what goes down the drains at home, work and school. It travels through a large network of sewers and pumping systems to a number of Regional treatment plants where solids are separated from the liquid and treated separately. The treated effluent is discharged to our river systems. The remaining treated solids, known as biosolids, are normally applied to agricultural land as fertilizer.

It is important to keep water other than wastewater, such as rain water, basement sump pump discharges, or foundation drainage out of the sanitary sewers that flow to wastewater treatment plants wherever possible, to avoid increasing the cost of treatment. Learn how to do your part. Municipal By-Laws control what may be discharged to a municipal sewer. Personal care products, baby wipes, grease, automotive liquids, garbage, and other liquid wastes do not belong in our sewers, and can have serious negative effects on our treatment plants and sewers.

Not all residences and workplaces in the Region are connected to municipal sewer systems. Many rural communities and small settlement areas rely on privately-owned septic systems to treat and dispose of their wastewater.

The Region also accepts and treats privately-hauled wastewater from septic tanks, holding tanks, and portable toilets.

Region of Waterloo's Role in Wastewater Services

The Region of Waterloo owns 13 treatment plants and six pumping stations, serving communities in three cities and four townships. The Region of Waterloo's Water Services Division oversees the construction, operation and maintenance of these facilities.

Most of the sewer and pumping systems are owned and maintained by the local area Cities and Townships, rather than by the Region.

Each day, the Region's wastewater plants treat 182 million litres of wastewater - enough to fill about 70 Olympic-sized swimming pools-created by over 500,000 residents and the Region's industry, commercial developments, and our institutions. As the Region continues to grow, these quantities continue to increase, and the Region is constantly at work planning and constructing upgrades and expansions to our treatment infrastructure to meet that growing demand in ways that do not compromise the health of our rivers.