This was stated by forest and environment minister Bijayshree Routray while replying to a question.
Similarly, out of 19 hot mix machines, four have not taken permission from the SPCB, the minister said.
The government has served closure notices to 379 units running sans permission and 630 units have been served show cause notice, he said.
The minister admitted that lack of infrastructure has posed an obstacle in taking action against illegal units.
Attempts are being made with the help of police and district administration to take steps against such units, Routray said.