Authorities have shut down several popular Sydney beaches after balls containing dangerous substances, including E. coli and saturated acids, were discovered, raising health concerns among residents and visitors.
Mysterious Debris Sparks Beach Closures in Sydney as Health Concerns Rise

Mysterious Debris Sparks Beach Closures in Sydney as Health Concerns Rise
Beachgoers in Sydney’s Northern Beaches area face warnings as health officials identify hazardous materials in newly washed-up balls.
The beaches of Sydney's Northern Beaches have been rattled after the discovery of small, marble-sized balls containing hazardous materials, leading to the closure of nine popular beaches on January 14. Authorities have found that these mysterious balls are not only comprised of saturated acids but also harbor E. coli and faecal bacteria.
In a proactive response, the Northern Beaches Council has sent the debris for detailed examination to the New South Wales Environment Protection Authority (EPA). This decision comes in the wake of previous incidents where thousands of black blobs—identified as "fatbergs"— washed ashore in October. These earlier blobs led to the temporary closure of several iconic beaches, prompting a significant cleanup effort.
Following the latest incident, the council has reported that a thorough cleanup was conducted earlier this week across various harbor beaches. Local officials are advising beachgoers not to touch any of the balls and to report any findings to the appropriate authorities.
Adding to the alarm, Mayor Sue Heins expressed hope that the forthcoming EPA analysis will pinpoint the origin of these dangerous substances to prevent future occurrences. The first batch of debris had previously been misidentified as "tar balls," but further investigations revealed a much more alarming composition, including an array of chemicals from cooking oils to pharmaceuticals.
Experts studying the balls liken them to greases and fats typically found in sewage systems, known as "fatbergs." However, Sydney Water has assured the public that their water treatment facilities are functioning properly and that no problems have been detected in the waste systems within the city.
As investigations continue, authorities maintain that safety inspections will be conducted regularly to protect the health of the community and the integrity of the beloved Sydney beaches.