Physical and Microbiological Qualities of Clear and Opaque Bottled Drinking Water Distributed in Ayutthaya Province

Abstract

In this study, the examination physical and microbiological qualities of 33 samples which were 25 and 8 samples of clear and opaque bottled drinking water distributed in Ayutthaya Province, respectively. The results showed that pH and total dissolved solid (TDS) of tested samples were in a range of 6.26±0.00 - 8.01±0.00 and 7.00±0.00 - 144.00±0.00 mg/l, respectively. All of bottled drinking water labels consisted of company name and place of production. Coliform bacteria and fecal coliform bacteria of water samples were less than 1.8 MPN/100 ml, but Escherichia coli was not found in all sample. Total heterotrophic bacteria was found in a range of 1.50±0.35 - 6.76±1.35x10¹ CFU/ml. After quality assessment of clear and opaque plastic bottled drinking water samples distributed in Ayutthaya Province based on the standard for drinking water in sealed container set by Ministry of Public Health of Thailand was investigated, the samples met the standards of some physical and microbiological qualities for 87.50% and 100% respectively.