Chlorine, in the form of sodium hypochlorite, is the most common disinfectant due to low cost and effective antimicrobial properties 4. The primary role of drinking water disinfection is to control pathogenic microorganisms and to ensure that treated water is biologically safe to drink. Gross National Income per capita is $12,476) which predominantly utilise centralised drinking water treatment systems to ensure the production and supply of biologically safe water 3. This is especially relevant for low income (i.e. Based on this evidence disinfectants where HOCl is the dominant chlorine species (HOCl and ECAS) would be appropriate alternative chlorine-based disinfectants for POU drinking water applications.Ī major source of human disease is via the consumption of biologically contaminated water 1. aeruginosa biofilms at ≥50 mg L −1 free chlorine. However, ECAS exhibited significantly greater anti-biofilm activity compared to OCl - and HOCl against P. coli at >50 mg L −1 free chlorine, in the presence of organic loading (bovine serum albumen). HOCl exhibited the greatest antimicrobial activity against planktonic E. The anti-biofilm activity was compared utilising established sessile Pseudomonas aeruginosa within a Centre for Disease Control biofilm reactor. The relative antimicrobial activity was compared within bactericidal suspension assays (BS EN 1040 and BS EN 1276) using Escherichia coli. This study investigated the antimicrobial and anti-biofilm activity of three chlorine-based disinfectants (hypochlorite ions, hypochlorous acid and electrochemically activated solutions ) for use in POU drinking water applications. The capability of point-of-use drinking water treatment systems has gained interest in locations where centralised treatment systems and distribution networks are not practical. Chlorine solutions are used extensively for the production of biologically safe drinking water.

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