Marathon Oil agrees to record penalty for oil and gas pollution on North Dakota Indian reservation

The federal government announced a $241.5 million settlement with Marathon Oil on Thursday for alleged air quality violations at the company's oil and gas operations in the Forth Berthold Indian Reservation in North Dakota.

Marathon Oil will be required to pay a civil penalty of $64.5 million, the "largest ever" for violations of the Clean Air Act at stationary sources, officials said. These facilities can include oil and gas tank systems.

The Environmental Protection Agency and Department of Justice said the settlement requires Marathon to reduce climate- and health-harming emissions from those facilities and will result in over 2.3 millions tons worth of pollution reduction.