Chantry Library is closed until further notice after bacteria was found in the water supply.
A routine test of the water on Tuesday showed the presence of legionella resulting in part of the building closing to users.
A spokesman for the library, said after consideration on Wednesday, when only part of the building was shut down, the entire building will now be closed.
The spokesman said: “On Tuesday we were advised of the results of a routine water test which revealed there is a risk that legionella bacteria could be present in the water supply in the toilets at Chantry Library.
"The toilets were immediately closed to customers. The café uses a separate filtered water supply and was not affected.
“We made immediate steps to prevent anyone accessing the affected water supply. The water is due to be treated on Thursday and will then be tested again.
“The health and wellbeing of our customers and staff is our top priority and whilst the library was open this morning, following further conversations with Suffolk County Council, we have been advised to close the library until the treatment and subsequent tests have been carried out.”
“We apologise to customers for any inconvenience and hope to re-open the library very soon.”
According to the NHS symptoms of Legionnaires' disease include: a cough, shortness of breath, chest pain or discomfort, particularly when breathing or coughing, a high temperature and flu-like symptoms.
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