Due to a leak, the large pool at Pendle Leisure Centre in Colne is closed until further notice.
Pendle Leisure Trust chief executive Mr Phil Storey said: “A specialist company is at the centre today trying to locate the leak.
“Once it has been found, we can then progress as quickly as possible to get the facility up and running again.
“We would like to apologise for any inconvenience caused, but at the moment, the situation is completely out of our control.”
The small pool is still open as normal.
If people have lessons or sessions booked, they should call reception on 661166 for advice or further information. Alternatively, they should keep checking the website www.pendleleisuretrust.co.uk for up-dates.
The pools at Pendle Wavelengths and West Craven Sports Centre are both open as usual if people want to use those facilities in the meantime.