Halifax Synchronised swimming club previously trained at the town's 50-year-old council-run pool but it was closed during the pandemic due to structural damage.
Calderdale council plan to build a new 2m deep pool costing £24mil in its leisure centre in the town, but the club claim it is not deep enough to train safely.
The previously pool was 3.8m deep.
The award-winning club has won national championships and boasts Great Britain synchronised swimming squad member Isobel Davies on its books.
However she fears the club will see membership dwindle if the club can't keep its base in the town.
Charlotte, 38, said: "The plans have been submitted to the planning department, they aren't very clear and don't show the depth, but it would appear it would be substantially less than two metres deep.
"For a synchro club to offer facilities to a national standard, we can't do that with a pool less than three metres deep. It's just not deep enough from a health and safety point of view.
"We won't be able to have as good a standard, we will lose members."
Filmed on 24th October 2021