Evaluation of Surface Water Quality Using Water Quality Index (WQI) and GIS Tool Of Anantapur Location

Abstract

The objective of this study is to estimate the quality of surface water in a semi-arid area of India, specifically in the pond located in Old Town, BKS Katta Road, Anantapur. The water quality index (WQI) is used to calculate the quality of the water samples taken from the pond, and a map of the water quality was created using geographic information system (GIS). The samples were analyzed for various factors including Electrical Conductivity (EC), Odour, Taste, pH, Temperature, Calcium (Ca2+), Magnesium, Total dissolved solids (TDS), Bicarbonate (HCO-3), Chloride (Cl-), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Dissolved Oxygen (DO), Nitrate (NO-3) and Iron (Fe-). Based on these analyses, spatial distribution maps were also prepared using GIS. The WQI values swayed from 61.875 to 74, ensuring that the pond water samples were of the highest quality and safe for direct consumption.