Scientists confirm composition of Sydney beaches’ mysterious ‘tar balls’
Black ball-shaped debris washed ashore on Sydney beaches this week.
Photo: Supplied / Randwick City Council Facebook
The black balls which shut down beaches in Sydney last month and stumped authorities are "disgusting" lumps of human faeces, drugs and PFAS chemicals, according to detailed analysis by researchers.
Initial reports suggested they were made of tar and could have come from an oil spill or waste from a ship, but a plethora of tests have revealed they are more similar to "fatbergs", commonly found in sewage systems.
University of NSW chemistry professor Jon Beves had the unfortunate job of analysing the smelly balls and said they also contained cooking oils, diesel or fuel and recreational drugs, including THC and methamphetamine.
"They're consistent with human-generated waste...










