Drinking water and water quality

Since the introduction of the Safe Drinking Water Act in 2002, more than $24 million dollars has been invested in Guelph’s water infrastructure to ensure the safety and quality of Guelph’s water supply.

Water quality and treatment

Water conservation

Guelph relies on groundwater for its water supply. We are committed to reducing our water use and protecting our water resources.

Guelph water… ours to conserve

Source Water Protection Program

The City of Guelph is committed to ensuring clean, safe drinking water for our citizens — today, and into the future.

Source Water Protection Program


The Guelph Wastewater Treatment Plant provides treatment of domestic, commercial, institutional and industrial wastewater collected from the City of Guelph and the neighbouring community of the Township of Guelph/Eramosa.

More about Wastewater

Water Supply Master Plan

The Water Supply Master Plan forms an integral part of the overall Water Supply Strategy that was initiated in 1999.

Water Supply Master Plan

Water/wastewater charges

Wise water use continues to help keep Guelph water and wastewater rates comparable to other Ontario municipalities.

Water/wastewater rates

Stormwater ponds

Stormwater refers to rainwater, melted snow or water that runs off our roofs, driveways and roads rather than soaking into the ground. We manage stormwater to control flooding and reduce pollution in our rivers and waterways.

Stormwater management