Other systems (process systems)​ - Legionella Risk Assessment

Other systems (process systems)​

The Health & Safety Executive Approved Code of Practice (ACoP) L8:2013 “Control of Legionella Bacteria in Water Systems” and supplementary guidance publications: HSG 274 Parts 1-3 relate to all commercial, industrial and municipal properties which have water systems.

Within L8 there is a requirement to carry out assessments of the risk of proliferation of Legionella within water systems. Further guidance is supplied in HSG274 Part 3: “The control of legionella bacteria in other risk systems”
We have been providing assessments of a range of systems for over 20 years,
Our ‘Other system’ Risk Assessments frequently cover the following:

  • Humidifiers
  • Air conditioning units
  • Scrubbers/Air washers
  • Spa baths/Pools
  • Process waters
  • Misting systems
  • Washdown systems
  • Miscellaneous Plant & other risk systems.

We utilise guidance from ACoP L8, HSG274 Parts 3, BS8580 and other relevant documents relating to the control of Legionella, in our assessment & subsequent recommendations.
Schematics are frequently not available or not suitable, we can provide a schematics drawing service ideally undertaken during the assessment or available as a stand-alone service.

To obtain full benefit from a Legionella Risk Assessment it is important that our staff are assisted to access all parts of the system during our visit and that your site records, schematics and asbestos register are available.

Responsibility for compliance following the Risk Assessment remains with the Responsible Competent Person who needs to review it, implement the recommendations and undertake routine preventative procedures.

Risk Assessments should be reviewed regularly based on the inherent risk but they should also be updated if there are any significant system or other changes.

Fundamentally the objectives of our Legionella risk assessments are:

  1. To establish the current position regarding water service condition.
  2. To establish a record of plant data.
  3. To identify areas where modifications or adjustments may be required from a water quality and/or safety point of view.
  4. To establish a programme for compliance with HSG 274 the Control of Legionellosis including Legionnaires Disease.
Evaporative cooling water systems

Verification of Controls

We frequently find that systems which appear to be satisfactory and in accordance with HSG 274 can still have hygiene problems. It is for this reason that we strongly recommend bacterial [Total Viable Count (TVC) and Legionella] sampling to compliment the physical data obtained during the assessment.

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