AUTHORITIES say 200 litres of oil dumped down a stormwater drain in Midland have not polluted local waterways, including the Helena River.
A Department of Water and Environmental Regulation (DWER) spokesperson said pollution response officers examined all drains in the vicinity and determined that the waste oil had not discharged off site.
The Department has asked the public for help to identify the person responsible for dumping the waste oil outside Super Cheap Auto.
A spokesperson said a nearby CCTV camera was not in operation.
DWER officers were called to the site last month and found used engine oil containers had been dumped overnight.
Officers worked with commercial clean up contractors and the City of Swan to have the stormwater drains pumped out and waste oil residues removed.
DWER’s senior manager pollution response Ken Raine said based on the types of containers, quantity and type of oil the dumper was likely to be part of a commercial business.
“We believe someone has deliberately dumped this oil, intentionally emptying the containers into the stormwater drain” he said.
“This stormwater system appears to potentially connect to the Helena River and unauthorised oil discharge incidents like this not only pollute local waterways but can kill wildlife.”
The offence carries a penalty of $5,000 for an individual and $25,000 for a company.
Anyone with information that could help identify the offenders is urged to contact DWER’s Pollution Watch Hotline 1300 784 782 (24 hours) or email email@example.com
Police have confirmed they will not be investigating because the dumping of oil is not a criminal offence.