I don't necessarily see this as a legionella issue. When it comes down to the crunch its simply people not doing the job they've been trained and instructed to do (on the presumption they've been trained).

It requires getting behind the face value facts and trying to understand WHY they're not taking the appropriate remedial action. Have they all had training or have many missed it, was that training understood (language, depth - do they understand WHY the temperatures are being taken and the risks they are looking after? etc.), are their time pressures or alternative pressures for not adjusting temperatures (despite having time for monitoring!)...worse still, are the temperatures genuinely being monitored (as opposed to being faked and throwing in some poor results to give them some credence)?

If they're lazy then its a line management issue. If there are other things going on then it's about finding a way around those issues. Investigate, speak to the people involved directly and try to avoid assumptions as far as you can.


My gut feeling would be somewhere between they haven't read your guidance note, don't understand or appreciate the risks and thus can't see the importance of taking immediate remedial action on their own initiative and are looking for a specific instruction. I could, of course, be totally and utterly wrong. ;)