Hot & Cold Water Monitoring

Expert Knowledge

Our water hygiene Hot and Cold Water Monitoring teams have acquired extensive knowledge and skills through study and practice over years of experience.

High Quality Standard

Our Hot and Cold Water Monitoring team only use the highest quality products.

Practical Advice & Solutions

Provide our clients with practicable advice and solutions to help maintain and improve their water systems.


Certified & competent consultants who work to a high set of standards

Water System Monitoring

HSE’s guidance on controlling legionella includes a requirement to routinely check the temperature of all hot and cold water services – Hot & Cold Water Monitoring. 

HSE L8 (Fourth edition) & HSG274 “Legionnaires’ Disease, The control of Legionella bacteria in water systems” asks for a written scheme for controlling the risk from exposure. This should be implemented and properly managed so that all water services are routinely checked for correct temperature, water demand and inspected for cleanliness and use.

Temperature control is the traditional strategy for reducing the risk of Legionella in water systems.

Routine Temperature Monitoring

Hot & cold water outlets (tap, showers etc.) should be monitored on a regular basis. Sentinel outlets should be monitored monthly to comply with guidance documents.

This can be done by our Competent Engineers or Remotely with our Innovative Online Monitoring Systems. We can provide a comprehensive range of services for water hygiene maintenance, inspection and monitoring to HSE & Healthcare requirements, including hot and cold water monitoring – routine temperature monitoring.

Cold water should be maintained, where possible, at a temperature below 20°C.

Hot water should be stored at least 60°C and distributed so that it reaches a temperature of 50°C (55°C in healthcare premises) within one minute at the outlets.

Waterman Environmental Services can help you to ensure your water systems are safe, clean and fully compliant with all current legislation. The HSE’s guidance on controlling legionella includes a requirement to routinely check the temperature of all hot and cold water services.

Other Monitoring Methods

Some sites use other treatment methods, such as chemicals (e.g. Chlorine Dioxide) or supplementary measures (e.g. Ozone Generation, UV treatment) to control both legionella and biofilm growth in hot and cold water systems.

In the appropriate application, these methods may be used to aid legionella control where maintaining a conventional temperature regime is difficult or where the removal of all dead legs and little used outlets is impractical.

Waterman can provide all types of methods to control bacteriological growth in water systems, ensuring our clients comply with legislation while also offering a range of innovative and environmentally friendly water solutions that will help them with cost & energy savings.

Hot & Cold Water Monitoring Process

Water Hygiene Hot and Cold Water Monitoring - Conduct an Assessment

Conduct An Assessment

Conduct an assessment and determine requirement for hot and cold water monitoring.
Hot and cold water monitoring - water hygiene

Undertake Hot & Cold Water Monitoring

Engineers attend site and carry out the monitoring using calibrated thermometers. They may also take samples, carry out remedial works (e.g. plumbing), inspections of tanks etc. The monitoring can also be undertaken remotely, Waterman Services can supply remote monitoring units and you can view the results online at any time. The monitoring from these units can include temperatures, flow rates, corrosion levels, scale levels, biofilm levels, chemical levels
Hot and cold water monitoring maintaining records

Maintain Records

All records should be maintained and kept for up to 5 years. Waterman Environmental Services will also carry out full annual reviews of the water management systems.


Our integrated compliance Online Monitoring System enables you to manage multiple assets from anywhere via web or mobile. Complete inspection tests, update information, raise non-compliances and report all within the app for a full audit trail and quick action management for full compliance.

Online Monitoring System

Scheduled Jobs

Lists and illustrates each number of jobs to be completed in the calendar month.

Completed Jobs

Number of jobs completed in the calendar month.

Completed On Time

Number of jobs completed on time as per schedule.

% Non-Compliant Closed

Number of non-compliant jobs actioned and closed off.

1,2,3 Repeat Failures

Assets that have repeatedly failed on 1, 2 or 3 consecutive visits.

Top Ten Highest Rank

Displays the top ten sites with the largest number of non-conformities.

Asset Identification

All assets on site are given a unique five / six digit number which allows the system to uniquely identify that specific asset, its location and frequency of testing.

Asset Location

Any individual can navigate to the exact asset to conduct the PPM check with minimal knowledge, thus preventing common mistakes.

Consistency of Data

Any asset can be made live or hibernated with a few minimal clicks via an office administrator allowing for certain rooms, floors, or blocks to be renovated without losing the data.

Photographic Evidence

All non-conformities or items to be escalated can be captured within the system for the client to review and action accordingly, in most cases providing both pre and post work photographs.

Client Signature:

If required, any section can have a client’s signature inserted to approve the engineers work at the time of the visit, inputting both their printed name, signature as well as the time and date of the visit.

Job Reports

All reports and work carried out can be downloaded in PDF format illustrating a large selection of data for your records.

Our Clients