Scarborough Councillors have been expressing their frustration with the bathing water quality in Scarborough's South Bay.
South Bay will retain a poor water quality rating for 2024.
Reighton, Runswick Bay and Scarborough North Bay have lost their excellent ratings, they will be classified as Good for the coming year.
Cayton Bay, Sandsend and Whitby retain their "Excellent" ratings.
Councillor Roberta Swiers says more investment is needed to tackle the problems.
Councillor David Jeffels is also calling for more investment in schemes to improve the bathing water quality in the town.
At a meeting on Friday, Yorkshire Water told local councillors it will be supporting an Environment Agency study in to water quality in Scarborough next summer and has a number of infrastructure schemes being rolled out in Whitby and Scarborough which include and accelerated scheme to invest in Wheatcroft Combined Sewer Overflow as a priority. The company says this scheme is due to start development in March 2024 and be complete by December 2024.
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