More action is needed to tackle a town's polluted river which has turned into "algae soup", councillors have said.

West Norfolk Council members spoke of their frustrations at the state of the Gaywood River, a rare chalk stream that runs through the centre of King's Lynn.

It has been claimed that parts of the river have become "algae soup" with ducks able to almost "walk on top of it," according to Deborah Heneghan.

Eastern Daily Press: The Gaywood River off Swans Lane in King's LynnThe Gaywood River off Swans Lane in King's Lynn (Image: Archant)

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It has led to calls for the local authority to put more pressure on the Environment Agency and other organisations to work together and create a plan to address the issue.

At a recent King's Lynn area consultative committee meeting, Alexandra Ware said: "It is absolutely important we get on top of this.

"The Environment Agency has said it knows what the cause is but still you have the situation where there is no wildlife in the river and it is a cloudy, murky mess."

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Eastern Daily Press: Rob Colwell has previously campaigned to improve the health of the Gaywood RiverRob Colwell has previously campaigned to improve the health of the Gaywood River (Image: Submitted)

Rob Colwell added: "The Gaywood River should be one of the highlights of our town but instead many people are concerned about the state of the water.

"We need to encourage responsible agencies to do more to help."

Eastern Daily Press: A view from high above the South Quay taken in King's Lynn in 1974 looking over the Millfleet where the Gaywood River feeds into the Great Ouse. A view from high above the South Quay taken in King's Lynn in 1974 looking over the Millfleet where the Gaywood River feeds into the Great Ouse. (Image: Newsquest)

Campaigners Gaywood River Revival have said the Gaywood River is being "slowly choked to death" due to pollution and abstraction and in 2019 high levels of mercury were discovered by the Environment Agency.

An EA spokeswoman said: “We’re aware that people are concerned about the health of the Gaywood River. We regularly monitor water quality in the river and can confirm that its overall ecological status is good.

"Our recent sampling and monitoring shows no evidence that the physical-chemical elements are having a detrimental effect on flora and fauna populations.

“If people suspect pollution, or have any concerns, they can report it to our 24-hour freephone incident line on 0800 80 70 60.”

Eastern Daily Press: A view of South Quay in King's Lynn, where the Gaywood River flows into the Great OuseA view of South Quay in King's Lynn, where the Gaywood River flows into the Great Ouse (Image: Newsquest)

The 6.7 mile river rises in Derby Fen, to the east of Lynn, and flows into the town's north eastern suburbs.

It passes through a culvert beneath the railway station and runs through the parkland of the Walks before entering another culvert and flowing into the River Great Ouse at the southern end of South Quay.