Temperature Monitoring

The regulations – HSE Legionella, ACoP L8, HSG274 part 2

The requirement for Legionella control in hot and cold water systems is detailed in the HSE document ‘Legionnaires’ disease.The control of legionella bacteria in water systems’. This document, often referred to as ACoP L8, is the approved code of practice and guidance. Hot and cold water systems are also covered in HSG274 part 2: ‘The control of legionella bacteria in hot and cold water systems’.

Maintaining a safe water temperature

In order to control the growth of Legionella bacteria in hot and cold water systems, water temperatures need to be kept outside the growth range of 20°C-45°C. HSG274 part 2 recommends that cold water is maintained below 20°C, and hot water is stored at 60°C within water heaters and calorifiers, with it reaching hot outlets at temperatures greater than 50°C within one minute of the outlet being operated.

Water Hygiene Temperature Monitoring
Sentinel outlets

It is important to evidence that your hot and cold water systems are storing water at the required temperatures. To facilitate this, it is a requirement to have the sentinel outlets (the nearest and furthest outlets from the point of storage) tested on a monthly frequency to record the temperature of the hot and cold water.

In addition, all outlets should be tested over the course of each year. Where the temperature fails to achieve the required level, identification of the cause needs to be undertaken and the defect recorded in the building defects register.

Building defects register

The building defects register must be kept up to date with all incidents of failures to achieve levels detailed in the control scheme. Where a defect is recorded, it should identify the date it was identified, who identified it, corrective action taken to resolve the defect, when the defect was corrected and by whom, and if any other action is required to prevent repeat occurrences.

Choose the option that works best for you

Rock Compliance offers traditional engineer-delivered temperature monitoring as well as remote online monitoring solutions that allow you to exceed the minimum requirements set out in HSG 274 part 2. Remote monitoring allows for 24-hour monitoring of your systems.

Rock Compliance Remote Temperature Monitoring
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Whether it is an issue of compliance, an investment decision, or you are just not quite sure whether your existing provider is giving you what you want, please contact us.  We will be happy to give you advice on how to create low risk, compliant water systems, ensuring spend is minimised and predictable.

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