Comparative Assessment of Water Quality on Spring Water and Supplied PHED Water in Aizawl City, Mizoram India

The present study was conducted during September 2019 to November 2019 and January 2020 to March 2020 respectively. The physico-chemical properties, viz. temperature, total solids, total dissolved solids, pH, alkalinity, acidity, total hardness, dissolved oxygen and biological oxygen demand were selected for determining and comparing the water quality of spring water and supplied PHED water. From the results, it is found out that supplied PHED water have higher temperature and pH value while spring water have higher value of total solids, total dissolved solids, alkalinity, acidity, total hardness, dissolved oxygen and biochemical oxygen demand. All the samples collected from spring water and PHED water meets the standard given by various scientific agencies. It was observed that the water quality of natural spring water changes due to the contact of rainwater with the sedimentary rock in the region leading to dissolution of ions into the aquifer and due to various anthropogenic activities. The supplied PHED water collected from three sites remained almost same in value; this could be due to the fact that the water is properly treated earlier.