In this section, we describe how legionella monitoring and inspection are important as water commonly contains legionella bacteria. The bacteria multiply where temperatures are between 20-45°C and nutrients are available. The bacteria are dormant below 20°C and do not survive above 60°C. Legionnaires’ disease is a potentially fatal type of pneumonia. You contract the disease by inhaling airborne water droplets containing viable legionella bacteria. Such droplets can be created by hot and cold water outlets, atomisers, wet air conditioning plant and whirlpool or hydrotherapy baths.
Here the ICE risk assessment is used to identify control measures that you must then implement to ensure effective legionella control management. There are some tasks that you will be able to do yourself. Others may need the input of an expert, so that you can be sure that your water system is operating safely. Because of this, ICE works with its customers to develop bespoke legionella monitoring procedures. As a result, this allows you to use your own resources efficiently and keeps you in control.
For instance, we identify ‘sentinel’ outlets (furthest and closest to each tank or cylinder) for monthly checking of the distribution temperatures. It is important that hot water storage cylinder temperature checks carried out each month. Cold water tank temperature measurents should be carried out at least every six months. You need to be confident that your water system is operating effectively with minimal or no risk. Firstly, ICE carries out legionella monitoring by measuring water temperatures and taking samples of water for testing. Then, ICE maintain and then adjust equipment; including thermostatic mixer valves, as required.