Over cannot be held wholly
responsible in this regard. The high court had in 1999 ordered that the inflow
of sewage and industrial affluents into the tank be stopped. The Bellandur tank
receives rainwater and other discharges in its catchment area spread over 257
sq Kms, Mr Vidyashankar said. The sewage system in the drainage zones of Koramangala,
Chellaghatta, and Tavarekere valleys covers only 125 sq Km of the catchment
area. The BWSSB has no control over effluents in the remaining catchment area
of over 100 sq Km, Mr vidyashankar added.