AS many as eight firefighters are at the scene of a hazardous materials emergency at Macksville.
Macksville and Coffs Harbour crews were called to a creek near East Street about 10am when the substance was discovered.
Macksville Fire Station commander Bill Lenthall said the substance “looked very much like” cooking oil which was being skimmed out of the waterway.
“We’ve got booms in place to stop it from going further down the creek,” Mr Lenthall said.
“We’re not sure of the source of the spillage. It could have very well been dumped in a drain and entered the creek from there.
“We don’t know how much has entered the creek but none has made it to the Nambucca River.”
Firefighters will be tied up at the scene for most of the day.