Ravi Kumar K.R. and Spoorthi
Abstract
This study investigates the current ecological and water quality status of Komghatta Lake, located in the western region of Bangalore, Karnataka. Rapid urbanization and unregulated human activities have severely impacted the lakeâs health, leading to increased pollution levels and a decline in water quality. Water samples were collected at different locations of lakes, borewells and sludge zones. These samples were analyzed for pH, Conductivity, Dissolved Oxygen, BOD, COD, Alkalinity, Total Dissolved Solids, Chlorides, Sulphates, Fluoride, Sodium, Potassium, Boron, Hardness, Calcium, Magnesium, Nitrates, Ammoniacal nitrogen and heavy metals etc. by standard procedures. The analysis revealed high pH levels, elevated biochemical oxygen demand, low dissolved oxygen, and significant bacterial contamination, including the presence of Escherichia coli and total coliforms. Although most physico-chemical parameters of borewell water remain within acceptable limits, microbial contamination raises concerns regarding its suitability for domestic use. Sludge analysis indicated the presence of metals, with iron being the most prominent, though within permissible limits. Based on the findings, the study recommends immediate remedial actions such as sewage treatment, de-silting, bio-remediation, catchment area management, and community involvement to restore and protect the ecological balance of Komghatta Lake.