Comparison of the bacteriological quality of tap water and bottled mineral water

International Journal of Hygiene and Environmental Health
Marie Eliza Zamberlan da SilvaBenedito Prado Dias Filho

Abstract

The bacteriological quality of tap water from municipal water supplies, 20-L bottles of mineral water from water dispensers and samples collected from new 20-L bottles of mineral water were comparatively studied. Total coliforms, termotolerant coliforms, Escherichia coli, fecal streptococci, Pseudomonas aeruginosa, Staphylococcus spp. and heterotrophic plate count were enumerated. The results showed that 36.4% of the tap water samples from municipal water systems and 76.6% of the 20-L bottles of mineral water from water dispensers were contaminated by at least one coliform or indicator bacterium and/or at least one pathogenic bacterium. The bacteriological quality of municipal tap water is superior when compared with the 20-L bottles of mineral water collected from water dispensers and samples collected from new 20-L bottles of mineral water before installation in the dispensers. This highlights the need for an improved surveillance system for the bottled water industry. For the municipal water systems, it is recommended to perform the Pseudomonas enumeration periodically, in addition to the routine data collected by most systems.

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Citations

Mar 20, 2010·Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz·UNKNOWN Kommission für Krankenhaushygiene und Infektionsprävention beim Robert Koch-Institut (RKI)
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Jun 9, 2016·Journal of Health, Population, and Nutrition·Narayan Dutt PantShyamal Kumar Bhattacharya
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Feb 15, 2020·Water Research·Robbe GeertsSiegfried E Vlaeminck
Mar 18, 2021·Molecular Biology Reports·Siew Mun LiewKek Heng Chua

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