Legionella Compliance

Legionella compliance and effective water system management are essential for protecting public health and meeting legal responsibilities. Regular risk assessments, monitoring, and maintenance help control the risk of Legionella bacteria developing in water systems, ensuring safe environments for building occupants and ongoing compliance with current health and safety regulations.

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Legionella Management

At Nemco, we understand that every water system is different, and therefore so are the needs and constraints of varying companies and organisations.
In light of this, all management programmes are tailored to meet the needs of the client and range from completion of weekly flushing for unmanned sites, to on-site training of maintenance staff.

What is Legionella?

Legionella is an aquatic bacterium, which means it must be suspended in a water droplet to survive. It is found in both natural and man-made water systems and can grow within a temperature range of 20–50°C.

Under the Health and Safety at Work Act (1974), Legionella risk assessments are a legal requirement. The Duty Holder has a duty of care to anyone in the building, as well as a legal obligation. This risk assessment should be carried out by a water hygiene specialist to ensure compliance.

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What is a Legionella Management Plan?

A Legionella Management Plan prevents exposure to bacteria that causes Legionellosis.

Where risk assessment shows there to be a foreseeable risk of exposure to bacteria, it is then necessary to implement ongoing controls to mitigate the risk highlighted within the assessment. This usually takes the form of a Legionella Management Plan and would include the following:

Weekly flushing of infrequently used services (Twice weekly in Healthcare properties)
Monthly temperature monitoring of sentinel outlets and Hot Water Vessels.
Quarterly descaling and disinfection of shower heads and Spray taps
Six Monthly purging of Expansion Vessels
Annual TMV failsafe or servicing, Annual Cold Water Storage Tank Inspections, Annual records(Logbook) review)
Awareness training
Tank cleaning and disinfection
Sampling

A site specific log book is created based on the report findings and water system detailed in the risk assessment setting out the controls necessary and appropriate forms for creation of an audit trail.

Useful Links

ACOP L8 - Legionnaires' disease. The control of legionella bacteria in water systems

HSG 274 Part 1: The control of legionella bacteria in evaporative cooling systems

HSG 274 Part 2: The control of legionella bacteria in hot and cold water systems

HSG 274 Part 3: The control of legionella bacteria in other risk systems

Health and Safety at Work etc Act 1974

The Control of Substances Hazardous to Health Regulations 2002

Areas We Cover

With engineers based across the UK, we're never far away

With offices in East Anglia, the South East, the West Midlands, and the South West, alongside a nationwide network of experienced engineers, we're always within easy reach. This extensive coverage allows us to respond quickly, minimise travel times, and deliver reliable, professional service wherever your site is located in the UK.

We work with organisations across a wide range of sectors, including healthcare facilities, schools and academies, local authorities, housing associations, landlords, care homes, council buildings, commercial properties, and industrial sites. From Legionella Risk Assessments and monitoring programmes to remedial works, water sampling, and ongoing compliance management, we help duty holders meet their legal responsibilities.