The Globe and Mail - Waterloo Region is short on water. It’s a cautionary tale for cities across Canada
“A lot of municipalities are one piece of infrastructure away from not being able to provide water or wastewater services, that’s just the situation the country is in. And much of the problem is invisible because it’s underground.”
Click here to read the article on The Globe and Mail.
This article examines how water supply constraints in Waterloo Region have exposed broader challenges facing fast-growing Canadian municipalities. After years of population growth, delayed infrastructure upgrades, declining aquifer levels, and inaccurate supply calculations, the region was forced to temporarily pause water servicing agreements for new developments. The decision affected thousands of proposed homes and revealed that parts of the municipal system were using more water than they could sustainably supply.
Waterloo Region operates Canada’s largest groundwater-based municipal system, relying on more than 100 wells alongside water drawn from the Grand River. While conservation efforts significantly reduced per-capita water use over the past two decades, infrastructure investment and water supply planning did not fully keep pace with growth. Officials also discovered that two major service areas had been treated as a fully integrated system in capacity calculations, even though water could not be transferred in both directions without additional pumping infrastructure. At the same time, damage at the Mannheim Water Treatment Plant reduced its output, leaving the region with less usable capacity than previously reported.
The situation has also raised concerns about the pressure placed on rural groundwater systems. Residents in Wilmot Township have reported declining well levels, intermittent water shortages, and the disappearance of wetlands as municipal pumping increased. Although regional officials maintain that groundwater withdrawals are supported by hydrogeological studies, local residents and researchers argue that stronger monitoring, transparency, and accountability are needed to understand how urban demand is affecting surrounding aquifers and private wells.
Waterloo Region has introduced temporary filtration systems, optimized existing wells, and planned several major infrastructure projects to increase supply over the coming years. However, the crisis illustrates how aging infrastructure, rapid development, limited system redundancy, and incomplete water data can combine to create significant risks. With an estimated $41 billion in Canadian drinking water infrastructure considered to be in poor or very poor condition, Waterloo’s experience serves as a cautionary example for municipalities attempting to balance population growth with long-term water security.
As Canadian cities continue to grow, national-scale initiatives like Canada1Water (C1W) can provide valuable hydrological insights to support more informed infrastructure and development planning. By integrating climate data with physics-based hydrological modelling, C1W helps assess groundwater availability, aquifer recharge, surface water flows, and the cumulative effects of changing land and water use. Waterloo Region’s experience demonstrates the importance of proactive, data-driven water management to ensure that municipal growth remains aligned with the long-term capacity of local water systems.