The Orissa State Pollution Control Board has issued closure notice to 10 sponge iron units of the Bhushan Group on the charge of violating pollution control norms, official sources said.

Bhushan Steel Ltd’s plant at Meramandali in Dhenkanal district has been directed to close down operation of six of eight 500 tonne per day capacity klins, the coke oven plant and oxygen plant for not conforming to pollution control norms as prescribed by the Pollution Control Board, the sources said.