Bug forces Wells Leisure Centre swimming pool to close
The Wells Leisure Centre swimming pool has been closed until January after a number of swimmers developed gastroenteritis.
Stuart Cave from Mendip District Council said it would stay shut until tests had been carried out "and we are sure the situation has been resolved".
The council said swimmers experiencing symptoms such as vomiting or diarrhoea should contact their GP for advice.
Operator Avalon Leisure said the water was contaminated by an external source.
The decision to close the pool was taken by the council's Environmental Health Department and Avalon Leisure after it emerged the water had become infected by cryptosporidium.
The parasite causes stomach upsets and the most common symptom is diarrhoea.
The pool will re-open on Monday 2 January.