A legionella outbreak on your premises is potentially lethal for your customers and will stop your business – and reputation – in its tracks.

According to the European Society of Clinical Microbiology and Infectious Diseases:
“Legionnaires’ disease is a type of pneumonia which is caused by the growth of Legionella in building water systems which are not adequately managed.”

Benefits of IWM’s Water Hygiene Services

By using our Water Hygiene Services you are:

  1. Ensuring that your water is safe
  2. Guaranteeing that your buildings are ready for use post pandemic
  3. Providing a safe environment for your customers and staff
  4. Complying with HSE and HSA regulations and guidelines.
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Our Range of Water Hygiene Services

Our range of environmental services and products will control and prevent the spread of legionella and other waterborne bacteria and ensure that you are compliant with the relevant guidelines and legislation.

Legionella Risk Assessment
Legionella risk assessments are a legal requirement as per the Health and Safety Act 2005. Our risk assessments cover all areas of water services on site including Cooling Towers, CWSTs, Calorifiers, Plate Heat Exchangers, and Showers among others. Our risk assessments come complete with schematics and are issued in draft form with a consultation meeting as standard prior to issuing the final report.

Water Sampling and Analysis
We conduct water sampling and analysis as part of ongoing legionella and other waterborne bacteria preventative maintenance programmes. We use an UKAS-accredited laboratory which tests for a wide range of microbiological and chemical parameters. On receipt of the results we issue a final report which contains a full breakdown of results as well as any corrective actions required.

Showerhead Clean and Disinfection
Showerhead clean and disinfection is a key factor in minimising the transfer of legionella from water source to host. All of our engineers and consultants are trained to carry out the task. We have our own shower head clean and disinfection rig onsite at IWM where we carry out the cleaning and disinfecting before sending the showerheads back to the client for use. 

TMV Servicing
Thermostatic Mixing Valves (TMVs) are typically used in water systems as anti-scald devices. Due to the temperatures that they operate at they are perceived as being a contributory factor to the growth of waterborne bacteria such as legionella. Our fully certified team of plumbers can carry out TMV servicing as part of a legionella control scheme.

Copper Silver Ionisation Units

Copper Silver Ionisation is a disinfection process, primarily used to control pathogens in water such as Legionella.

Copper Silver technology is recognised by the World Health Organisation, US Environmental Protection Agency (EPA), UK Health & Safety Executive HSG274 Part 2 – The control of legionella bacteria in hot and cold-water system within potable water distribution covering hospitals, hotels, residential/commercial buildings.

It can be used in many other areas such as irrigation and cooling towers, by using a non-chemical water treatment technology which is regarded as the most effective prevention and remediation solution for not only for Sessile and Planktonic organisms but also eliminating the build-up of Biofilm in Pipework.

Our Copper Silver systems are regulated in conjunction with high accuracy ultrasonic water meters ensuring proper and controlled dosing at all times.

Mass of the electrodes must be large enough to handle the total volume of water to be treated and current must also be adequate to cater for the volume of water to be treated and adhering to the IEC 1201 regulations which limits the amount of voltage applied to water or wet environments and not to exceed a maximum of 35 Volts DC.

Electrode sizing should be based around the facilities water usages taking into consideration the levels of dosing to ascertain a like for like comparison.

Total surface area of electrodes maximises the current density, the larger the total surface area the greater level ionisation will take place within the flow Cell. Equipment must be sized correctly based on 100% inline installation and be large enough to dose the total flowing water.

Once Ionisation of the Copper and Silver electrodes has taken place these will remain active in the system until they come in contact with any Legionella within the network, if there is zero Legionella in the system then the ions will remain for a very lengthy period unlike other technologies such as Chlorine or Chlorine Dioxide which will not only gas off at higher temperatures.

Flow Cells for all volumes – All Water Treated – NOT side stream flows.


Small Cell Unit/NT LC1K

Medium Cell Unit/NT LC8K

Large Cell Unit/NT LC16K

Typical Installed System                                        

Multiple Configurations


Conor Sands (Contracts Manager)
Email: cs@iwm.ie

Paul McGourty (Senior Account Manager)
Email: paulm@iwm.ie