Regina's city clerk can start the verification process on a massive 24,000-name petition that was dropped off at city hall Thursday.
The people behind the petition want a referendum held on Regina's plan for a new wastewater treatment plant.
A valid petition needs to have at least 19,300 signatures. The people who gathered the names appeared confident they had met the threshold.
"I think the message is clear: the people of Regina want a vote on the future of their wastewater treatment plant," Jim Holmes, a spokesman for Regina Water Watch said Thursday.
The group spent about three months gathering names.
The issue concerns a plan to involve the private sector in a $224-million upgrade to the city's wastewater facility.
Known as a P3 model, the private company would build, finance and operate the plant. The city would own the facility and set rates for the service.
The city claims the P3 approach will save taxpayers about $80 million.
But the Water Watch group disagrees, and claims the P3 approach will actually cost taxpayers an extra $60 million.
The city clerk has 30 days to review the signatures and determine if it is valid.
If it is, a referendum must be held within nine months.