Legionella Risk Assessments – Support With Water Systems

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What is Legionella

Legionella is a bacterium that grows and multiplies in water temperatures between 20 to 45 °C, particularly in stagnant water systems such as unused outlets, dead legs and infrequently used assets. Inhalation of contaminated droplets can cause Legionnaires’ disease.

A workplace legionella risk assessment for hot and cold-water systems identifies design flaws and high-risk areas that may promote bacterial growth.

Why it matters

The UK Health and Safety Executive lays out the standards for legionella in the Control of Substances Hazardous to Health Regulations 2002 under biological agents. Further guidance has been laid out in HSG274. As part of these regulations and guidance, companies are required to check and control the risk of Legionella exposure through a comprehensive control scheme, which includes annual reviews, a temperature control regime,  assessments following system modifications and updating monitoring logs carried out by qualified maintenance teams.

What we do

Validate Consulting Ltd is proud to provide detailed risk level-rated Legionella assessments for hot and cold-water systems that are fully compliant with ACoP L8 regulations. Our expertly trained Occupational Hygiene Consultants test outlets, cold water storage tanks and calorifiers for condition, temperature and usage. We conduct assessments nationwide, with bespoke prices tailored to your details and required services.

What you receive

Following the assessment, you will receive a clear and comprehensive report outlining:
• Measurement methods and equipment used

• Detailed Hot and cold water system analysis

• Practical recommendations to reduce risks

• Identification of high-risk assets in the system and guidance

 

Legionella Culture Plate against running water

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Whether you're looking to meet legal obligations or proactively protect your workforce, we're here to help.
Get in touch to discuss your needs or request a quote.

Legionella FAQ

How often do I need to do a Risk Assessment?
The ACOP L8 state that the Legionnaires risk assessment should be reviewed regularly and specifically whenever there is a reason to suspect it is no longer valid. The guidance states that the risk assessment should be a living document which must be regularly reviewed to ensure it remains up to date. The risk assessment should also be reviewed anytime there is a significant change such as adding to or modifying your water systems, the use of the water system has changed, key personnel have changed or your legionella control measures are no longer working.

What Our Clients Say

"Validate – A first-class organization, efficient, trustworthy, competitive, and reliable. I have used them on many occasions and have always been completely satisfied with the job they have done."

Geoff Northey - Independent Consultant, Former Group H&S Advisor, Altro Group Ltd

"We have been working with Validate Consulting Ltd since 2011 and have found that they provide a professional service, 1st class reports, and ongoing support and advice."

The Safety Health and Environmental Team, Heatrae Sadia

"I’ve been using Validate Consulting for air and noise sampling for a number of years now, and during this time they have always provided my organisation with clear concise information and advice on all sampling they have undertaken on my behalf, Validate Consulting have always been quick to react to our needs and I would say their service has always been second to none, this feeling is reinforced further as we are a global organisation and now use them across our other manufacturing facilities."

EHS Manager, Aerospace Engine Manufacturer in the South West

"Validate have always been professional, understanding and helpful, they have provided solutions to improve our working environment for many of our employees. They have helped us with updates in legislation and specifically with onsite assessments in COSHH, Noise and LEV testing. No question is too much trouble, we look forward to an ongoing relationship and I would definitely recommend their services."

Rob Lockyer, HSE Manager, Saint-Gobain Performance Plastics Rencol

Why choose Validate Consulting 

  • Trusted Through Word-of-Mouth
    • Most of our business comes from client referrals, a true testament to the trust, reliability, and satisfaction we deliver.
  • Tailored, Practical Solutions
    • We don’t believe in one-size-fits-all. Every recommendation is tailored, realistic, and grounded in your specific operational needs.
  • Expertise Without the Ego
    • Our experienced consultants are highly qualified and technically sound, but we’re easy to work with, friendly, and down-to-earth.
  • Fast Turnaround, Without Cutting Corners
    • We deliver high-quality reports and results promptly, helping you make quick, informed decisions without delay.
  • Clear Communication, No Jargon
    • We explain risks and controls in plain language, so everyone from operators to directors understands what needs to be done and why.
  • Independent and Unbiased Advice
    • As an independent consultancy, we’re not tied to equipment sales or external agendas, just your best interests.
  • Specialists in the Realities of Small and Medium-Sized Businesses
    • We understand the challenges SMEs face and work within your budget, timeframes, and operational constraints.
  • Building Long-Term Relationships, Not Just Jobs
    • We aim to become your trusted long-term partner in health protection - not just a one-off service provider.