Water Temperature Thermometer for Legionella Monitoring & Control. Report of the Texas Legionnaires' Disease Task Force, Texas Department of State Health Services Infection Due to Legionella Species Other Than L. pneumophila Barry S. Fields*, Robert F. Benson, and Richard E. Besser RR910 - Survival of Legionella pneumophila in metalworking fluids . Controlling water temperatures is important as it is a great way of controlling legionella in your water systems. As a rule of thumb, the cold water should be kept cold (below 20 o C), and the hot water should be kept hot (above 50 o C, 55 o C in healthcare) at all outlets. If any issues are identified or remedial action required, this should also be noted in the records. Again, record your findings.It’s also important to check the temperature of the cold water outlets. Legionella Control Internationals range of professional water temperature thermometers and legionella testing kits have been carefully selected to help those with responsibility for the routine monitoring and control of Legionella bacteria in water systems. Record the temperature, which should be lower than 20°C.

This risk assessment may be very simple for low risk premises, however for larger or higher risk properties may include a narrative of the site, asset register, simplified schematic drawings, recommendations on compliance, and a proposed monitoring scheme.The L8 Approved Code of Practice recommends that the risk assessment should be reviewed at least every 2 years and whenever a reason exists to suspect it is no longer valid, such as water systems have been amended or modified, or if the use of the water system has changed, or if there is reason to suspect that Legionella control measures are no longer working.
Keeping your home's water heater at 140°F will reduce the growth of Legionella.. Have a pen and paper handy so you can write down your findings as it’s important to keep a record for future reference.

Legionella in hot and cold water systems Water temperature Check flow and return temperatures at calorifiers. As a minimum this should be done every two years, but if there are any alterations to the plumbing system in the meantime we recommend redoing the assessment.Legionella bacteria thrives at temperatures between 20°C and 50°C so one of the key control measures for minimising the risk is to ensure that your cold water is cold (i.e. Nalco + Bulmers – neither could prove a sufficient scheme to be in place whilst investigating an outbreak, therefore both were fined about £300,000GBP.

Remove the tank lid (water storage tanks should have a well-fitting lid to prevent debris from entering the system) and insert the thermometer for a minute. The more expensive [citation needed] option is temperature control—i.e., keeping all cold water below 25 °C (77 °F) and all hot water above 51 °C (124 °F).

Retrieved from • Water at 110 F is in the ideal breeding temperature for Legionella bacteria growth.
However, to reduce the risk of scalding, the temperature of water leaving the shower head or faucet should be no higher than 122°F. Starting with the sentinel tap again, let the tap run for two minutes with the thermometer in the water flow. Heat. Simple as this sounds, there is more to monitoring the water temperature than meets the eye, so we’ve put together this handy how-to guide for duty holders.Duty holders with responsibility for controlling the risk of Legionella should check water temperatures as part of the risk assessment process. If the temperature doesn’t reach 50°C you need to take remedial action e.g. Copper-silver ionization is an effective process to control Ultraviolet light, in the range of 200 to 300 nm, can inactivate Legionella. If it doesn’t have a digital display, make sure that you can read the markings clearly. Control of Legionella growth can occur through chemical, thermal or ultraviolet treatment methods. below 20°C) and the hot water is hot (above 50°C). According to a review by the US EPA,Monitoring guidelines are stated in Approved Code of Practice L8 in the UK. (This can allow scalding if stacking occurs or if someone adjusts the system temperature at the water heater thermostat or a master mixing valve.) If Legionella are permitted to remain in water at this temperature, the whole water system concerned is at risk of infection, and this can occur very quickly. These are the conditions which allow harmful bacteria such as Legionella to grow. Setting the Water Heater Temperature Keeping your home's water heater at 140°F will reduce the growth of Legionella. Make sure that you replace the lid properly.All temperature records should include the location of the outlet or tank, the actual temperature, the name of the person carrying out the check as well as the date and time the temperature was taken. Failure to show monitoring records to at least this standard has resulted in several high-profile prosecutions, e.g. Important case law in this area is R v Trustees of the Science Museum 3 All ER 853, (1993) 1 WLR 1171Employers and those responsible for premises within the UK are required under Control of Substances Hazardous to Health to undertake an assessment of the risks arising from Legionella. The temperature reading should reach at least 50°C. Further, no current standards for silver in the EU and other regions allow use of this technology.


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