The notice dated January 10 was issued to the plant located in Okhla in South Delhi for emission from its pollution control devices.
"There are uncontrolled emission from the pollution control devices of the plant episodically. We have held various inspections in the past following which the show cause notice was issued," a DPCC official said.
Last week, a protest march was taken out in Okhla against the release of toxic emissions from the plant with protestors alleging that the company was responsible for release of dangerous emissions near their houses in violation of Supreme Court orders.