Legionella Risk Assessments
Legionella Risk Assessments
HSE L8 and HSG274 compliant assessments for residential and commercial properties
A Legionella risk assessment is the foundation of water safety compliance. Under HSE's Approved Code of Practice L8, every employer, landlord, and duty holder who is responsible for a water system must carry out a suitable and sufficient assessment of the risk from Legionella. This isn't optional — it's a legal requirement.
Our assessments go beyond a simple tick-box exercise. We carry out a thorough physical survey of your entire hot and cold water system, identify every risk factor, and deliver a detailed report with clear, prioritised recommendations. You'll know exactly what needs attention, what can wait, and what your ongoing monitoring obligations are.
What's Included
Full System Survey
We inspect every element of your hot and cold water systems: tanks, calorifiers, pipework, outlets, dead legs, TMVs, showers, and any other water-using equipment.
Schematic Review
We assess your system schematic (or create one if it doesn't exist) to identify potential risk areas and areas of stagnation.
Temperature Profiling
We take representative temperature readings at sentinel points throughout the system to verify thermal control.
Detailed Risk Assessment Report
A clear, actionable report compliant with L8 and HSG274 Part 2. Every risk is scored and every recommendation is prioritised as immediate, short-term, or long-term.
Asset Register
A complete register of water-related assets including tanks, calorifiers, TMVs, and outlets.
Review Schedule
We tell you when your next assessment is due and what ongoing monitoring you need in place.
Why It Matters
Legionella bacteria can colonise water systems where conditions are right — particularly where water temperatures fall between 20°C and 45°C, where there's stagnation, or where there's a build-up of scale, rust, or biofilm. Without a proper risk assessment, you won't know whether your building is at risk. And if something goes wrong, the HSE will want to see evidence that you took reasonable precautions — starting with a competent risk assessment.
Every year, the HSE investigates outbreaks of Legionnaires' disease in the UK. Duty holders who can't demonstrate compliance face enforcement action, fines, and in the worst cases, prosecution. A quality risk assessment is your first line of defence.