How to Read a Water Hygiene Report

A water hygiene report should not just be filed away.

It should help you understand what is happening across your water systems, what risks exist, and what actions need to be taken.

HSE’s ACOP L8 is aimed at dutyholders and covers identifying and assessing risk, preparing a scheme to prevent or control risk, implementing and monitoring precautions, keeping records, and appointing a responsible person.

1. Start with the engineer’s visit summary

This section should tell you:

• What was inspected or monitored
• Whether any issues were found
• What actions are required
• How urgent those actions are

Look for clear wording, not just technical data.

2. Review temperature results

Temperature results are one of the most important sections.

Check whether:

• Cold water is being maintained below 20°C where possible
• Hot water is stored at 60°C or above
• Hot water reaches 50°C within one minute at outlets
• Healthcare premises meet the higher 55°C outlet expectation

These temperature benchmarks are set out in HSE guidance for hot and cold water systems.

3. Look for repeated failures or trends

One failed reading matters.

Repeated failures matter even more.

Ask:

• Is the same outlet failing regularly?
• Are issues happening in one area of the building?
• Are failures linked to low-use outlets?
• Are corrective actions being closed out?

4. Check recommendations and actions

A good report should clearly explain:

• What needs doing
• Why it matters
• Who is responsible
• The priority level
• Whether the action is complete or outstanding

Avoid letting reports become a list of unresolved actions.

5. Review asset and outlet information

The report should reflect the current site.

Check:

• Are all relevant outlets included?
• Are sentinel outlets identified?
• Are TMVs, tanks, calorifiers, showers, and low-use outlets captured?
• Has anything changed on site since the last report?

HSE notes that dutyholders need to understand the type, operation, and key parts of their water system, including sentinel outlets, TMVs, dead legs and dead ends.

6. Check evidence of control

The report should help prove that risks are being managed.

Look for:

• Completed monitoring records
• Failed results with corrective actions
• Flushing records
• Cleaning and disinfection records
• Outstanding remedial actions
• Review notes

HSE guidance says a competent person should routinely check, inspect, and clean the system in accordance with the risk assessment.

Key message for facilities managers

A water hygiene report is not just compliance paperwork.

It is a management tool.

Read properly, it helps you spot risk, track actions, challenge gaps, and stay in control of your water hygiene responsibilities.