Water quality in the Hooghly estuary is being managed using a linear programming model. This model helps determine the amount of treatment needed to improve water quality by considering factors like BOD and DO levels. The goal is to find the most cost-effective way to remove BOD from the water. The model looks at different scenarios to see how changes in water quality objectives impact the cost of treatment. The results show how treatment costs vary based on different parameters, helping decision-makers plan for effective water quality management.