Quality of bottled waters from refilling stations based in Iligan City [Philippines]
2005
Valdez, S.A.L. | Deocampo, A.H. | Solon, C.C.E | Lahoylahoy, L.D. | Anies, O.S.Mindanao State Univ.-Iligan Inst. of Technology, Iligan City (Philippines). Dept. of Biological Sciences)
The consumption of bottled water in the Philippines has skyrocketed in recent years. It is largely due to the perception of the general public that bottled water are safer and cleaner than ordinary tap water. It is imperative to test whether its quality meet the expectations of the consumers. Three bottles each from nine local refilling stations were purchased on December 2004 and were analyzed for Heterothropic plate Count (HPC) to determine the efficacy of the water treatment process. The HPC of each bottle was determined. Box and Whisker plot analysis revealed that differences between and among refilling stations is highly significant. A closer look at the data shows that Brand 9 had the lowest mean value and thus the lowest CFU per mL increase over time. Brands 1 and 5 had the highest mean values which mean that these had the widest range of colony counts from the first to the last sampling period indicating the presence of organic matter in the water. It is therefore safer to infer the ineffectiveness of the processing of bottled water by some local refilling stations.
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