Bangalore Water Supply & Sewerage Board [Bwssb] — Dumping drainage water in vacant land

Respected sir/ madam
In a residential area k.narayanapura Kothnur post near golden plam apartment some private drain vehicles are dumping 10-15 tanks of drain water daily in a vacant land, the land owner is taking money from private vehicles and letting them to dump, it is creating lots of pollution in the surrounding location please take serious action against private drainage vehicle in this location .
K.narayanapura, Kothnur post, opps to golden plam apartment, Bangalore 560077