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Routine Water Testing Identifies Legionella At John Mackintosh Wing

09 March 2026
Routine Water Testing Identifies Legionella At John Mackintosh Wing

Last week the GHA confirmed that, as part of its routine water testing programs at John Mackintosh Wing, it may have identified the presence of Legionella bacteria in isolated water samples taken at the facility. 

A statement from the GHA follows below:

The Gibraltar Health Authority (GHA) has confirmed that, as part of its robust routine water testing programs at John Mackintosh Wing, it may have identified the presence of Legionella  bacteria in isolated water samples taken at the facility. 

The GHA is very keen to stress there are no human cases of Legionnaires’ disease associated with this finding.  

Further, the GHA emphasises that such laboratory preliminary results are not uncommon and always require validation and confirmation. 

Nevertheless, and as an immediate precautionary measure, all affected water outlets have been temporarily taken out of use while definitive investigations are urgently repeated. 

Alternative potable water supplies have already been procured and are being made available to ensure the continued safe operation of the facility and the convenience and wellbeing of all  residents and staff. 

Enhanced monitoring is also being undertaken, with residents and staff being closely observed for any symptoms consistent with Legionnaires’ disease, although it is important to reiterate  that there no immediate safety concerns. 

The Director of Public Health, Dr Helen Carter, said: “Whilst there are no human cases and the water testing results have yet to be validated by the GHA Laboratory, we are treating this  matter with the seriousness it requires. The immediate precautionary steps taken are designed  to protect residents, staff and visitors while the GHA undertakes its own in-house testing of the  samples and, if necessary, is poised to investigate the source and complete the necessary  remedial action. Residents’ safety remains the absolute priority.”