Environment Protection Authority Victoria (EPA) is continuing to monitor water quality in Steele Creek, Niddrie, following last month's fuel tanker spill on the Calder Freeway.
An estimated 175,000 litres of contaminated water, including fuel and firefighting foam, was removed from the creek during the immediate cleanup effort.
Metropolitan Manager Daniel Hunt said EPA was assisting Melbourne Water and Moonee Valley City Council with advice on water quality and returning the creek to its normal state.
“Our latest on-site water tests have returned normal readings, but a small amount of slick build up is still present in some parts of the creek,” Mr Hunt said.
Mr Hunt said floating booms were being used to contain and absorb any remaining contaminants and would be removed once all the pollution was gone.
“EPA has been providing regular water sampling results to Council and Friends of Steele Creek to ensure the local community are kept informed throughout the recovery effort,” he said.
The signs advising people to avoid contact with the creek will be removed once final test results confirm the water has returned to its normal state.
The community can stay up-to-date with pollution alerts at www.yarraandbay.vic.gov.au.