Legionella Risk Assessment Completed – Here’s What FM Must Do Next

So, you’ve had your Legionella risk assessment completed. Great start — that puts you ahead of many. However, the most important part now is taking action. The evaluation itself won’t protect your building, users, or your compliance status. It’s what you do next that matters.

In this guide, we’ll walk you through the key steps to take after an assessment, outline your legal obligations, and show you how to put a watertight Water Safety Plan in place — all with a practical, facilities management lens.

1. Understand What the Legionella Risk Assessment Tells You

Your Legionella risk assessment is more than just a box-ticking exercise — it’s a detailed blueprint of where the risks are in your hot and cold-water system.

What to Look For in Your Report:

Risk ratings: Areas marked as high, medium or low risk
System schematic: Locations of outlets, pipework, dead legs, water tanks, calorifiers
Remedial actions: Specific recommendations to reduce or eliminate risk
Compliance gaps: Areas where your site may not meet ACOP L8 or HSG274 standards

Start by reading through the executive summary, then deep-dive into the recommendations. Flag anything that requires urgent attention, especially in high-risk areas like care facilities, areas with vulnerable users, or buildings with complex water systems.

2. Take Action: Implement Control Measures

Risk assessments highlight problems. Control measures fix them. Depending on your site and the assessment findings, you may need to implement any combination of the following:

Common Legionella Control Actions:

Hot water temperature correction – Ensure outlets reach 50°C+ within 1 minute
Cold water temp checks – Must stay below 20°C at outlets
Flushing regime – For infrequently used outlets or empty areas
Dead leg removal – Remove unused or capped-off pipework
Tank cleaning & chlorination – For storage tanks or systems with visible contamination
TMV servicing – Thermostatic Mixing Valves need regular checks for both safety and Legionella control

Depending on the complexity of your system, this task may be handled internally or require the services of a specialist contractor, such as Titan Mechanical Services.

3. Develop (or Update) Your Water Safety Plan

This is where you take a proactive approach. A Water Safety Plan (WSP) turns your one-off risk assessment into a living document that drives ongoing Legionella control.

Your Water Safety Plan Should Include:

A full asset register of water system components
Designated Responsible Person for water hygiene
Detailed monitoring schedules (monthly, quarterly, annual checks)
A logbook system for all temperature checks, flushing records and maintenance
Clear remedial protocols if results fall outside safe parameters

If you’ve not yet created a WSP — or your existing one is outdated — this is a critical next step. It’s also something we help many of our clients implement after their initial risk assessment.

4. Assign Responsibility and Ensure Staff Are Trained

You can’t do it all yourself. Assigning clear responsibilities is essential for ongoing compliance.

Who Does What?

Responsible Person – Oversees Legionella control, internal policies and logs
Nominated deputies – May carry out flushing, temperature checks or reporting
External specialists – Support with testing, tank cleaning, remedials or system redesign

Training is key — staff must understand why these measures are essential and how to implement them effectively. You don’t want to discover, months down the line, that checks were being conducted but not recorded— a common failing.

5. Monitor, Record, Review — and Stay Compliant

Legionella management isn’t “one and done”. Ongoing monitoring and documentation are not only best practice — they’re a legal requirement under UK water hygiene regulations.

What to Monitor:

Monthly temperature checks at sentinel outlets
Quarterly TMV inspections
Annual tank inspections
Records of any remedial works, flushing or cleaning

Final Thoughts: Don’t Let the Paperwork Gather Dust

A Legionella risk assessment is a powerful tool — but only if it is used effectively. By taking swift, structured action, you’re not only staying compliant with ACOP L8 and HSG274 — you’re also protecting your building users and reputation.

If you're unsure about what to do next or need help implementing a Water Safety Plan, Titan Mechanical Services can assist you. From remedials and repairs to full system upgrades, our team collaborates closely with facilities managers across the UK to ensure buildings are safe and compliant.

Need help implementing the recommendations from your risk assessment? Let’s make it easy — get in touch with Titan today to get started https://www.titanmechanicalservices.co.uk/contact.