BWSSB — Cauvery water mixed with drainage water

from past 1 month, cauvery water is mixed with DRIANAGE WATER, can you please check this. my address is No.112/2, Manju Nilaya, Srinivagillu, Viveknagar post, EG PURA, BANGALORE-47. I HAVE CALLED THE BWSSB person who is incharge of that area and he knows it too.Inspite o raising serveral complaints this is still not resolved. can higher authorities look into this. my mobile no. [protected] Thank You B M APPAIAH