A Thirst for Water Poses Challenges for New Data Centres

Why It Matters

Water consumption directly ties data‑centre expansion to regional scarcity, influencing permitting, public acceptance, and the sustainability of Canada’s AI infrastructure ambitions.

Key Takeaways

• Microsoft Ontario data centres approved for 1.2 bn and 730 m litres yearly.
• Closed‑loop cooling reduces but does not eliminate water use, raising costs.
• Alberta projects bypass environmental assessments, prompting criticism from Clean 50.
• Public support low; only 16% of Canadians favor local data‑centre projects.

Pulse Analysis

The rush to position Canada as a hub for AI‑driven hyper‑scale data centres is driven by abundant low‑cost electricity and a naturally cool climate, both of which lower traditional energy bills. Yet the hidden cost is water. Large‑scale facilities can consume millions of gallons daily, a volume comparable to small towns, and the recent approvals for Microsoft’s Ontario sites—totaling roughly 2 billion litres per year—highlight how municipal water supplies are becoming a strategic resource in data‑centre siting decisions.

Cooling technology is at the heart of the water debate. Closed‑loop systems recycle the same fluid, dramatically cutting withdrawal rates, but they require substantial capital outlays and sophisticated maintenance. Some operators, like Bell Canada’s upcoming Sherwood facility, are betting on these designs to sidestep municipal water use altogether. Alternatives such as reclaimed industrial water or hybrid air‑side cooling can further reduce demand, yet each option carries trade‑offs in cost, efficiency, and regulatory complexity. Alberta’s recent waivers of environmental impact assessments for projects like Wonder Valley and Synapse underscore a policy tension between rapid AI infrastructure rollout and rigorous environmental stewardship.

Stakeholder sentiment adds another layer of risk. Surveys show only 16% of Canadians actively support local data‑centre projects, with a majority demanding transparent engagement and tangible community benefits. Environmental NGOs, notably Clean 50, criticize the lack of scrutiny, framing the water issue as a litmus test for broader climate policy. As water scarcity intensifies across North America, regulators, developers, and municipalities will need to balance economic incentives with sustainable resource management, making water‑smart design and public trust essential pillars for the next wave of Canadian data‑centre growth.