Under the COSHH regulations, the following precautions must be observed:-
Any water contained within the product must not be allowed to stagnate, ie. the water
must be changed regularly.
Any rust, sludge, scale or algae on which micro-organisms can feed must be removed
regularly, ie. the equipment must be cleaned regularly.
Where practicable the water should be maintained at a temperature below 20°C or
above 45°C. If this is not practicable then the water should be disinfected if it is safe
and appropriate to do so. Note that other hazards may exist in the handling of biocides
used to disinfect the water.
A scheme should be prepared for preventing or controlling the risk incorporating all
of the actions listed above.
Further details on preventing infection are contained in the publication “The Control
of Legionellosis including Legionnaires Disease” - Health and Safety Series booklet
HS (G) 70.
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