Assessment of Water Quality and Pollution Levels in Dorekere Lake, Bangalore

ABSTRACT This study investigates the water quality of Dorekere lake, which has faced significant anthropogenic activities leading to environmental degradation. Ten sampling sites were selected for the study, four locations within the lake, four borewell sources nearby, and two inlet/outlet points. These samples were analyzed for pH, Conductivity, Dissolved Oxygen, BOD, COD, Alkalinity, Solids, Chloride, Sulphate, Fluoride, Sodium, Potassium, Boron, Hardness, Calcium, Magnesium, Nitrates, Ammoniacal nitrogen and heavy metals etc. by standard procedure and results were analyzed to know the pollution level. The results reveal that BOD values exceeded limits in all lake samples, while high counts of Total Coliform and E. coli indicated significant microbial contamination. Borewell water samples collected from residences reveals elevated Total Coliform and E. coli counts, rendering them unfit for consumption. These findings show the urgent need for effective management strategies to restore water quality and protect the ecological integrity of Dorekere Lake. KEY WORDS: Water quality, Dissolved Oxygen, BOD, COD, Ammoniacal Nitrogen, Total Coliform