Posted By Jim Tassell (2) Sorry if this is an "egg-sucking" reply but have you checked out the HSE legionella ACOP for starters?

Posted By Jim Tassell (2) I'll go away and suck my egg - sorry! Jim

Posted By Graham Bullough Apologies for not being able to offer information about cooling tower maintenance. However, mention of them prompts me to comment wryly on how often they (assuming you mean the giant concrete structures at power stations, etc) seem to be shown on TV news items about chemical pollution. Sadly the journalists, etc who choose such images fail to realise that such towers are just large heat exchangers for cooling large volumes of water and thus emit nothing but steam and heat! This fact may be backed up by a scene from a film I partly saw some time ago about a team of electricity pylon painters starring Pete Postlethwaite. The character he played and and a female painter were at the base of a cooling tower and were clearly not wearing any PPE. Moreover, they weren't wearing anything at all and seemed to be using the tower as a giant shower facility. Does anyone with some knowledge of the film know if this was because their usual post-work washing facility was out of order and either they decided to improvise or the tower's operator had offered it as an alternative facility? Though much of this response is admittedly a Fridayish frivolity, I can try and diminish the frivolity with a tenuous link to the original posting by hoping that the film makers and actual operators of the cooling tower (probably at a power station in Yorkshire somewhere) gave some consideration to the possibility of legionella within the tower before filming the scene! p.s. The IOSH forum spellchecker understandably queried the name "Postlethwaite" above, but offered no alternatives. However, somewhat curiously, it queried "legionella" and offered various alternatives like "regionally" and "Leonelle".