Bangalore Water Supply & Sewerage Board [Bwssb] — cauvery water mixed with drainage water

Address: 560068

I am from muneshwara nagar, mangammanpalya. We are from 2nd cross the cauvery water is mixed with drainage water for the past 6 months, and no action has been taken we have reported it to local officers and no action is being taken. The water smells horrible and is not even fit to use for sanitary purpose. I i request concerned authority to take immediate action...