Experts blame high level of pollution on poor regulatory mechanisms in place and allege that the state pollution control board has not been able to bring down pollution levels as it has not taken action against culprits
While high BOD is an outcome of a stagnant river stretch and should improve during monsoon and summer, surge in the value over the last few years during a given season is worrisome.Stagnant water also leads to the growth of invasive species
There are four zones around the TG Halli reservoir. Among them, zone four, stretching from Shivagange to TG Halli on both sides of the Kumudvathi River (a tributary of Arkavathi), and zone three (Hesaraghatta to TG Halli on the banks of the Arkavathi River) currently have a one-kilometre buffer zone where no construction activity is permitted.