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Microbiological and Physicochemical Quality of Drinking Water

Chan, C.L., and Zalifah M.K., and Norrakiah A.S., (2007) Microbiological and Physicochemical Quality of Drinking Water. Malaysian Journal of Analytical Sciences, 11 (2). pp. 414-420. ISSN 13942506

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Official URL: http://pkukmweb.ukm.my/~mjas/v11_n2/CheeLing.pdf

Affiliations

Universiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Chemical Sciences and Food Technology, Food Science Programme
Universiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Chemical Sciences and Food Technology, Food Science Programme
Universiti Kebangsaan Malaysia, Faculty of Science and Technology, School of Chemical Sciences and Food Technology, Food Science Programme

Abstract

This study was conducted on the water samples collected before and after filtration treatment was given. Five types of filtered drinking water (A1, B1, C1, D1 and E1) and five types of unfiltered tap water (A2, B2, C2, D2 and E2) were chosen randomly from houses in Klang Valley for analyses. The purpose of this study was to determine the quality of filtered drinking water by looking into the microbiological aspect and several physicochemical analyses such as turbidity, pH and total suspended solid (TSS). The microbiological analyses were performed to trace the presence of indicator organisms and pathogens such as Escherichia coli, Streptococcus faecalis and Pseudomonas aeruginosa. All of the water did not comply with the regulations of Food Act as consisted of more than 103-104 cfu/mL for total plate count. However, the total coliforms and E. coli were detected lower than 4 cfu/mL and not exceeding the maximum limit of Food Act. While the presence of S. faecalis and P. aeruginosa were negative in all samples. The pH value was slightly acidic (pH<6.5) compared to the range in the regulations. The TSS for the samples were low (1.0x10-4 - 2.2x10-3 mg/L) and the turbidity for all the samples were recorded below 1 Nephelometric Turbidity Units (NTU) thus, complying with the regulations. All the water samples that undergo the filtration system were fit to be consumed.

Item Type:Journal
Keywords:Quality, Drinking Water, Filters, Microbiology, Physicochemical
Subjects:Q Science, Computer Science
ID Code:5233

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