What is a legionella risk assessment?

Legionella Risk Assessment – BS 8580-1 2019

A legionella risk assessment is a process to determine the risk of contraction of legionnaires disease and the potential for growth of legionella bacteria within the water systems at your premise(s).
This is a requirement under the Health & Safety at Work Act 1974 and COSHH. This will be carried out in accordance with the latest British Standard and in accordance with ACOP L8 and HSG 274.

What will happen during this risk assessment?

GMS will carry out the risk assessment with the minimal disruption to your site. Water systems will not be disturbed during the risk assessment unless this has been agreed in advance.
Our detailed risk assessments will include as a minimum

  • A written document including a FULL asset register.
  • Schematics if existing drawings are not available or out of date.
  • Photographic evidence of non-conformities
  • Temperature testing at all hot and cold-water outlets
  • Cold water tank and calorifier surveys with recommendations
  • Shower and TMV inspections and temperature tests
  • Appraisal of current control scheme and management procedures.
  • Recommended control procedures for ongoing maintenance following risk assessment.

Water sampling and on-site legionella testing is optional and will be discussed prior to the site visit. Legionella sampling may be recommended during a risk assessment should a serious risk be identified. This would be agreed with the responsible person before any sampling is undertaken.

GMS risk assessment team

All GMS risk assessors are adequately trained and qualified to perform legionella risk assessment. The right risk assessor with adequate experience will be selected to fit the complexity of the site they are visiting.

Our administration team who support the risk assessment department are vastly experienced and trained to support the team and our clients before, during and after the site visit is undertaken. The report goes through a audit procedure before being returned to the risk assessor for final comment, ensuring that the documents are an accurate representation of your site.

Electronic copies will be issued as a standard. Hard copy risk assessments and site-specific hard copy log books can also be provided as part of this service. This will be discussed prior to conducting the survey.

Leave a Reply

Find out how we can help you!

With our extensive experience in Legionella Risk Assessment Services & Water Treatment Services Contact us today to find out how we can help you.

Contact Us

Understanding Backflow Prevention and Why It Matters

Protecting Drinking Water from Contamination Backflow prevention is one of the most important aspects of water system design and compliance. Every year, businesses, healthcare facilities, schools, hotels, and industrial sites invest in plumbing systems to deliver clean drinking water throughout their premises. However, without adequate backflow protection, contaminated water can potentially enter the wholesome water… Read more »

Commercial Water Pressure Problems: Causes and Solutions

Understanding Water Pressure Issues in Commercial Buildings Consistent water pressure is essential for the safe and efficient operation of any commercial building. Whether it’s a healthcare facility, school, hotel, office block, or industrial site, inadequate or excessive water pressure can cause operational disruption, equipment damage, user complaints, and increased maintenance costs. Many pressure-related issues develop… Read more »

GMS Spring Team Day 2026

Yesterday we got the whole GMS team together for our latest company day — and it was a great mix of learning, teamwork, and a bit of fun competition. We kicked things off in the morning with anti-harassment and mental health training, reinforcing how important it is to maintain a supportive and respectful workplace for… Read more »

More great feedback about #TeamGMS

👉 Another fantastic piece of feedback from one of our hospital clients in the South West—received by one of our directors. #healtcare #respect #dignity #workethic #communication #staff #culture #legionella #waterhygiene #commercialplumbing Hi Jamie,  Do hope you are well?  We had Ryan, Niall and Aarron on site these past two weeks. We just wanted to express… Read more »