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Feedwater Limited • Tarran Way West • Moreton • Wirral • CH46 4TU • United Kingdom
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Chlorine Dioxide has proved the most effective method of Legionella control in water systems.
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legionella control with chlorine dioxideLegionella Control & Legionnaires’ Disease Prevention with Chlorine Dioxide

Chlorine Dioxide has been shown to be extremely effective in the control of legionella bacteria and the prevention of Legionnaires’ Disease and Feedwater’s patented Activ-ox® system is the easiest and safest way to treat drinking, domestic and cooling water with chlorine dioxide.

Legionnaires’ Disease is a potentially fatal form of pneumonia caused by legionella bacteria which live in biofilms in water systems. Many conventional biocides are ineffective in controlling legionella and are unable to penetrate or disperse biofilms. Chlorine Dioxide, or ClO2 for short, has been shown to be extremely effective at penetrating and killing biofilms and the legionella bacteria that they harbour.

Activ Ox creates ClO2 instantly in solution

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The Journal of Applied Microbiology reports that: "Chlorine dioxide...was identified as the most efficient [continuous treatment] for controlling L. pneumophila in a domestic water system.

An investigation carried out by BSRIA into the treatment of hot and cold water systems using Chlorine Dioxide it was shown to be more effective than the traditional temperature regime in controlling both biofilms and legionella bacteria in model domestic water systems. (BSRIA Technical Note TN 2/98).

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More about Chlorine Dioxide

Why is Activ-Ox® the best Chlorine Dioxide System for Preventing Legionnaires’ Disease?

So what makes Activ-Ox® different to other chlorine dioxide systems?

Legionella Control with Chlorine Dioxide is universally accepted as a very effective way to prevent Legionnaires' Disease - but you can’t just buy a drum of chlorine dioxide. It is in fact an unstable gas which has to be generated at point of use and dissolved in water to be able to work. Traditionally, this meant that you needed what is called a “chlorine dioxide generator”, which is a complex dosing system, expensive to buy and operate, very unreliable and which uses hazardous chemicals. A traditional ClO2 generator is, in essence, a mini chemical production plant which should only really be used by a competent operator, but unfortunately these specialist items of equipment are still being specified for all kinds of applications for which they are not suited.

When we saw the potential for chlorine dioxide to control legionella in buildings and cooling water in order to help prevent Legionnaires’ Disease, we recognised the need for a safe, efficient process for generating ClO2 that could be used by the non-specialist.

So we developed the patented Activ-Ox® process which enables us to produce an incredible 95% chlorine dioxide yield instantly, dissolved directly in the water to be treated, using low hazard chemicals. Being able to produce ClO2 instantly, on demand, has enabled us to produce a much simpler and safer dosing system, because simplicity and safety go hand in hand.


Feedwater has been helping prevent Legionnaires’ Disease for over 30 years and supplying Activ-Ox® chlorine dioxide dosing systems for well over a decade to control biofilms and legionella bacteria in cooling water, domestic water, hot tubs and spa pools. We produce a range of dosing systems for building services and industrial applications including our new Activ-Ox® 2000 Compact system with which we aim to bring the unique biocidal properties of ClO2 to the smaller user such as nursing homes, office blocks and smaller hotels who need and effective strategy for Legionnaires’ Disease prevention but who have traditionally been put off by cost or safety concerns. We believe it is the simplest, safest and most cost effective ClO2 dosing system on the market.

We supply a range of Activ-Ox® chlorine dioxide chemicals designed to control biofilms and legionella bacteria and help prevent Legionnaires’ disease. These include a special ClO2 foam cleaner, an Activ-ox® Spa and hot-tub biofilm cleaner and a combined shower head cleaner and disinfectant.

Contact us now for all your chlorine dioxide and legionella control requirements.

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