Assessment of groundwater fluoride using GIS in Shahapur Taluk, Hyderabad-Karnataka region, India

Abstract

This study aims to identify high fluoride concentration in ground water of Shahapur taluk, Yadgir district of Karnataka (India). For this purposes sixty five ground water samples were collected during the pre and post monsoon season. The fluoride concentration in ground water samples was determined as per the standard methods for the examination of water and wastewater. The concentration of fluoride in the groundwater samples varies from 0.25 to 4.85 mg/L. Among the sixty five samples analyzed, 26.14% and 6.15% of the samples exceeded the maximum permissible limits of fluoride during pre and post monsoon season respectively. A fluoride zonation map has been prepared using ArchGIS software. The areas below 1.5 mg/L of fluoride have been labeled as safe zones and the areas above 1.5 mg/L as risk zones.