Waterloo Region is facing a water-capacity crisis that has put new housing approvals, rural wells and long-standing protections for Wilmot’s aquifers into direct conflict.
A strategic water-capacity review found the Mannheim service area, which draws from the Wilmot aquifer, could not support planned growth toward the Region’s target population of one million by 2051. More than 5,000 new homes were awaiting final approvals when councillors learned the required water commitments could not be met, forcing projects to be put on hold.
For years, Wilmot residents have warned that wells, wetlands and ponds are drying up. Their drinking water comes from underground aquifers that recharge as rain and runoff filter through the Waterloo moraine and surrounding farmland. The Region also draws from those aquifers to help serve urban growth. This raises a difficult question: what happens when demand outpaces recharge and city needs collide with rural supply?
Residents of Wilmot were further alarmed to learn the Region had been taking 30 litres per second above agreed limits from Wilmot’s aquifers since 2019 despite a 1980s agreement meant to prevent over-pumping. That agreement itself followed similar problems during Kitchener’s expansion in the 1970s.
Samantha Lernout, president and founding member of Citizens for Safe Ground Water, says the Region is repeating past mistakes.
“Have we not learned from what’s happened in the past?” she said. “They dry up residential wells, they dry up wetlands, they dry up ponds, they compromise farming operations—it’s all happened before.”
Rather than restore the limit, council voted to cancel that agreement. In June, councillors approved an additional 15 litres per second, but only temporarily, after Wilmot Mayor Natasha Salonen pushed for a sunset clause tied to new side-stream capacity coming online.
Meanwhile, residents say the consequences are immediate. Dry wells disrupt homes, farms and businesses; shrinking surface water affects habitat and property values; low water can draw sediment and contaminants into household systems. Some families have cancelled gatherings for fear of running out of water.
With Well Interference Committees not currently active, residents say they have had little recourse to prove Regional pumping caused the problem. Deeper wells can cost $30,000 to $60,000, while the Region has offered $4,000 to affected owners who sign waivers against future claims.
Advocacy Groups including Citizens for Safe Ground Water, Nith Valley EcoBoosters and the Grand River Environmental Network are pressing for stronger protections, independent science and meaningful public involvement.
Recent community briefings advise all Wilmot residents to monitor their water system for pressure drops, clarity issues, or increased grit or sediment, and to call the Region at 519-575-4400 or notify the community database at wilmotgroundwater@gmail.com if they notice anything out of the ordinary.
“[Waterloo Region] has to stop reacting only after the pumps run dry,” Lernout said.
Advocates from Citizens for Safe Ground Water want an immediate independent study of aquifer health, proactive monitoring of sentinel wells, full data transparency and a permanent Well Interference Policy developed with residents at the table.
For now, interim protections require the Region to provide emergency water assistance to any Wilmot resident facing a supply disruption until Aug. 12, 2026, regardless of whether they live inside historic compensation zones. Regional Council is expected to vote then on a permanent policy.
At the same time, council has approved an interim risk-management plan that lowers water-resiliency targets from 20 to 12 per cent to help meet development timelines. Staff expect that change to free up 20 litres per second of capacity, enough for about 7,000 people, while the Region also explores recommissioning older wells along the Grand River.
The province has acknowledged the issue is complex. In a letter to Regional Chair Karen Redman, facilitator Dan Mathieson called for a comprehensive response that expands capacity, creates a transparent allocation framework, strengthens conservation and revisits policies governing system resiliency.
The Region approved an Interim Risk Management Framework which will allow development to proceed safely and quickly that is expected to meet forecasted growth over the next five years. They’ve also engaged the Ontario Clean Water Agency to review and provide input into the water capital plan, and have held an online public information and consultation session to discuss updates to its Groundwater Interference Complaints policy.
Kitchener Centre MPP Aislinn Clancy has also tabled a motion for a Waterloo Moraine Protection Act, seeking Greenbelt-like protection for the moraine to preserve recharge capacity while supporting long-term regional growth.
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