The microbiological quality of potable water on board ships docking in the UK and the Channel Islands: an association of Port Health Authorities and Health Protection Agency Study

Journal of Water and Health
P GrenfellG Nichols

Abstract

Providing safe potable water onboard vessels presents particular challenges and contamination can occur directly from source waters as well as during loading, storage and distribution. Between May and October 2005, 950 potable water samples were collected from 342 ships docking at ports. Comparison with Guidelines found 9% of samples contained coliforms, Escherichia coli or enterococci and 2.8% had faecal indicators (E. coli or enterococci). Action levels of aerobic colony count (ACC) bacteria were detected in 20% (22 degrees C) and 21.5% (37 degrees C) of samples. ACC results from one-off sampling are not informative as this does not enable port health authorities to monitor ACC trends. They should be removed as a routine criterion for remedial action and vessels should adopt the WHO Water Safety Plan approach, whilst continuing to monitor water quality with public health-based indicators (e.g. chlorine residual, coliforms, E. coli and enterococci). Logistic regression analyses identified practices associated with water quality. Practices protective against coliforms, E. coli or enterococci in potable supplies were: good hose hygiene, processing water onboard, maintaining free chlorine residual at >or=0.2 mg/L. This emphasizes...Continue Reading

Citations

Jun 17, 2011·Epidemiology and Infection·F SerdarevicS I Gerber
Aug 3, 2012·International Journal of Environmental Health Research·Varavara MouchtouriChristos Hadjichristodoulou
Mar 12, 2010·BMC Public Health·Varvara A MouchtouriUNKNOWN SHIPSAN Partnership
Aug 7, 2012·Gastroenterology·Sylvie Deuffic-BurbanPhilippe Mathurin
May 23, 2012·The Science of the Total Environment·Varvara A MouchtouriChristos Hadjichristodoulou
Nov 29, 2016·Epidemiology and Infection·S L CollinsC Willis
Jun 10, 2016·Journal of Water and Health·D L BakerA Watkinson
Jun 18, 2011·Liver International : Official Journal of the International Association for the Study of the Liver·Markus CornbergStefan Zeuzem

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