Problems with pollution could ruin the idea of turning the River Wey through Alton into a chalk stream, says a member of a group opposed to the pond and river option for Kings Pond.

The idea of separating the pond from the River Wey to improve the river’s water quality is being considered alongside dredging the pond by Alton Town Council.

But Anthony Furnival of the Kings Pond Preservation Society warned that too much bad stuff flowed into the pond to turn the chalk stream dream into reality.

He said: “There’s many flaws with the council’s idea of a chalk stream, as chalk streams are characterised by their incredibly pure water. That can’t happen with so many drains piped into the river and pond.

“The suggestion that the chalk stream is better for the waterway doesn’t stand up to scrutiny as this drain water introduces hydrocarbons, oils and other pollutants from the roads.

“That’s before considering the financial cost of plans, implications to wildlife, increased flood risk and public feeling - all of which have huge merit.”

The Kings Pond operational task and finish group appointed by Alton Town Council on March 5 has now held two meetings.

At its first meeting on April 8 it published an expression of interest invitation to organisations and companies under the categories of contractors, project management and specialist organisations. Responses will be evaluated at the task and finish group meeting on May 22.

A town council spokesperson said: “The council recognises that some residents remain concerned that it is taking some time for a clear decision to be taken. Both options have to be explored extensively.”

Preliminary ecological appraisal and wintering bird survey reports are on the town council website.

The first meeting of the Kings Pond community and stakeholder focus group is at Alton Town Hall on July 2 at 6pm.