Tens of thousands of gallons of hog waste escaped from a Duplin County hog farm just over a week ago.
The Department of Environmental Quality said about 84,000 gallons of waste entered a tributary of Doctors Creek.
Officials say an equipment malfunction at Murphy-Brown farm on Kenan Loop Road near Wallace led to the spill.
The company removed waste from the creek, putting it back into a secondary lagoon at the farm, and the DEQ will continue to monitor water quality in the area.