GSPCB chairman Jose Manuel Noronha told PTI that the ore flowing into water can be hazardous.
According to the state government figures, three million metric tones of ore has been stacked on these jetties.
Moreover, one million metric tonne of ore, which has already been sold through e-auctioning, is awaiting its transport.
The GSPCB is concerned as the monsoon which hit yesterday has covered almost entire state including the talukas where these jetties are located.
Also Read
He said that while 0.3 mg of ore is permissible in the water body, but with the stacks washing into river, the concentration of ore can touch upto one mg.
The ore which was on its way to export was suddenly stopped at various jetties, stacking yards and mining leases in September 2012, when the state government suspended mining activities following the Supreme Court order.