A Study of Activ-Ox Chlorine Dioxide effect on Hotel Legionella Control in lockdown
As the UK emerged from the first lockdown and businesses started to reopen, the challenge of maintaining good microbiological control, during this Lockdown period became apparent.
To study this, Feedwater carried out comparative data analysis to evaluate the impact of chlorine dioxide on controlling Legionella proliferation in water systems during Lockdown. The case study was carried out on hotels with similar water systems where the presence or absence of Feedwater Activ-Ox treatment is the main variable.
In one UK hotel chain, Activ-Ox is used to control the growth of Legionella bacteria in some of its water services. During the first COVID lockdown, the water systems were subjected to routine outlet flushing to maintain Legionella control. In systems that are treated with Activ-Ox ClO2, levels of Legionella bacteria remain significantly lower than in the hotels where Activ-Ox is not in use.
The data is presented in the table below.
The two hotels in this case study that were not treated with Activ-Ox showed significantly higher colonisation with Legionella compared to hotels that used Activ-Ox as a control measure.
Maintaining acceptable microbiological control became more challenging in water systems during the COVID-19 lockdown. Lower occupancy levels and associated drop in water usage meant that pathogenic bacteria such as Legionella became more difficult to control. Additional interventions such as dosing with chlorine dioxide were needed to maintain safety and compliance in these systems.
Dosing Activ-Ox into the distribution network controls Legionella growth and thus dramatically reduces post lockdown colonisation.
*Colonisation was reduced to 8% after persistent flushing.
** All analysis was carried out in Accepta’s UKAS accredited laboratory.
If you would like to find out more about Activ-Ox for use in your application you can get in contact with us using the form below.
You can also download a copy of this study as a PDF here. 
What is Activ-Ox?
Feedwater’s patented Activ-Ox® chemistry and generation process is simpler, safer and more effective than other methods of producing chlorine dioxide and provides an excellent means for water hygiene control in a wide range of water systems including domestic systems, the hospitality sector and highly critical systems such as healthcare premises.
Chlorine dioxide is universally recognised as an excellent biocide and disinfectant for a wide range of applications because of its unique combination of properties. However, the traditional chemicals and generator systems used to produce chlorine dioxide can be complex, expensive and difficult to control. Activ-Ox®, by contrast, uses our unique chemistry and advanced dosage systems to provide the simplest, safest and most cost-effective means of enjoying the benefits of chlorine dioxide.
This can be best demonstrated in action with a video comparing the instant reaction between Activ-Ox pre-cursors and the slower reaction of conventional chemistries.
