Water Treatment and the issues around Legionella 

Water Treatment and the issues around Legionella EndoSan Silver Stabilised Hydrogen Peroxide is a highly effective water treatment solution which is a truly credible alternative to traditional chlorine disinfection methods. It will totally remove biofilms whilst being non-corrosive at dose rates. Maintaining its efficacy (kill rate) at a wide range of temperatures and pH values, EndoSan is odourless, colourless and tasteless; lending itself to many applications in the field of water treatment. The Health and Safety Executive support the use of EndoSan as a constant dose biocide in their official guidance document: HSG274 Pt 2 – The Control of Legionella Bacteria in Hot and Cold-Water Systems.

Silver Stabilised Hydrogen Peroxide has also been proven to help reduce carbon emissions by enabling building managers to reduce the temperature of the hot water systems considerably by around 40% to 46 degrees C and still have continued negative legionella tests. Not only does this enable the control of Legionella but reduces the energy consumption (cost saving) and also carbon reduction from the reduced energy usage. Thus helping buildings and companies in the pursuit for Net Zero Carbon emissions under çekici government guidelines.

Key Benefits

Example Application Areas


What is Legionella?

The bacterium Legionella pneumophila and related bacteria are common in natural water sources such as rivers, lakes and reservoirs, but usually in low numbers. Unfortunately, given the right conditions, Legionella bacteria can prosper in purpose-built water systems in any type of premises. When water contaminated with Legionella bacteria forms small droplets suspended in the air (aerosol or vapour), there is a very high risk of inhalation and the potential contraction of Legionnaires disease which can be deadly.

High Risk Legionella Areas

Cooling towers, evaporative condensers, spa pools/jacuzzies, hot and cold-water systems. Systems that feature outlets like showers are particularly problematic, as water is turned in to an aerosol and dispersed into the atmosphere. Hospitals and nursing homes are at higher risk as vulnerability to Legionnaires’ disease increases with age and pre-existing health issues.

The Biofilm Problem

A biofilm is a group of micro-organisms in which cells stick to each other and adhere to a surface. Biofilms protect bacteria and provide a habitat that is the ideal environment for survival and replication. Additionally, the dispersal stage of the biofilm life cycle enables the spread and colonisation of additional surfaces.
Biofilms can be found in: Pipework Low flow areas Stored water Dead legs on water systems Water between 25°C and 45°C Recirculated water