A Case Study: Water Quality Content between Water Supply and Water Vending Machine at Parit Raja, Johor

Abstract

Water quality study was conducted on water vendor machines with different types of systems that are available around Parit Raja, Batu Pahat such as reverse osmosis systems, systems nanotechnology nano-silver system and water supply pipes. The aim of this study is to distinguish the water quality from the vending machine that follow the standard quality whether authorized or not. Standard water quality parameters such pH, iron concentration experiments, experimental manganese, aluminum and experimental testing ammoniacal nitrogen were computed as comparison. Nanotechnology system water produces better quality when comparing to the pipe water as its pH value shows 6.62. From the experiments the concentration of iron, manganese, aluminium and ammoniacal nitrogen shows 0.08-, 0.07-, 0.05-, and 0.01 mg/L respectively which all the values are in compliance with the National Drinking Water Quality Standards (NDWQS). As for water from reverse osmosis system and pipe water supply both its pH is 6.2 and 6.4 correspondingly which both are not concurrence with National Drinking Water Quality Standards. However, iron content for water from reverse osmosis (0.30 mg/L) is higher than water supply pipe (0.12 mg/L) and both are in the standard range. Iron content of the water supply pipe which is not allowed by 0.14 mg/L. Compared with water from a reverse osmosis system in which the iron content is at a maximum of 0.10mg / L. The parameters of aluminium and ammoniacal nitrogen, the two systems are at acceptable levels. For water from nano-silver system, all parameters are in compliance with the National Drinking Water Quality Standards.