People worried about the water supply in Charlottetown are holding a public meeting about the Winter River watershed. (CBC)

People worried about the water supply in Charlottetown are holding a public meeting on Wednesday about the Winter River watershed.

The watershed provides about 92 per cent of the water supply for the city of Charlottetown.

Don Mazer, the co-chair of the Winter River-Tracadie Bay Watershed Association, said the watershed has the usual problems of siltation and water quality, plus the strain of water quantity issues as the source of water for the growing city of Charlottetown.

He said a tributary in the watershed temporarily dried up earlier this year because of that strain.

"The 18 million litres of water that are extracted everyday by the city are not available to recharge our water supply because they are pumped out contrary to flow. So that certainly is one of the issues we'll be discussing," Mazer said.

"The city is pretty close to tapping us out."

Last month, the city of Charlottetown began a campaign to get people to ease up on their water consumption.

The average Charlottetown resident uses 305 litres of water a day, according to the city. It hoped to reduce that amount to 260 litres a day.

In 2010, 6,703,744 cubic metres of water pumped from the Winter River watershed and 1,989,540 cubic metres of that water was for single-family homes. One cubic metre of water equals 1,000 litres.

Mazer said the goal of the meeting is to come up with a long-term watershed management plan.

"We're under a lot of strain and we're trying to see if we can get some things happening so that we can avoid being in a crisis situation," he said.

"We're in a problem situation now and not very far from being a crisis situation."

The meeting begins at 7 p.m. at Grand Tracadie Elementary School.