Hydrogeochemical and water quality index (WQI) evaluated in Beedanahalli watershed T narasipura taluk mysore district, Karnataka, India.

Beedanahalli Watershed, hydrogeochemical experiments were conducted to evaluate the quality and suitability of groundwater for drinking. Thirty-one groundwater samples were taken in 2022's pre and post-monsoon seasons. Groundwater's physiochemical characteristics, including pH, EC, TDS, Ca2+, Mg2+, Na+, K+, HCO3-, Cl-, SO42-, and NO3-, were measured. The overall hydrochemistry of the groundwater samples in both seasons is shown in Gibb's (1970) diagrams as occurring in the rock dominance field. Assessment of groundwater quality is important in the current situation. The primary goals of the current study are to evaluate and classify the groundwater quality for drinking. To evaluate the subsurface water in the study area, 14 distinct physiochemical parameters were examined. The Bureau of Indian Standards (BIS) was attracted to make a comparative analysis of the values. The water quality index is one of the finest ways to determine whether groundwater is safe to drink (WQI). The extracted components show that topography, agronomic, rainfall, domestic sewerage, and production drain water were among the factors that caused the sources to exceed the allowable limit. The recent study indicated that some groundwater samples had extremely poor water quality, showing that the region is mostly affected by rock weathering and salt evaporating from the bedrock into the water supplies, posing a major threat to the natural ecosystem.58% and 51% of groundwater samples taken before and after the monsoon, respectively, were determined by the WQI index to be appropriate for drinking.