Exclusive: Fat, oil and grease built up in sewerage pipes before being dislodged by heavy rain and ejected from Malabar outfall

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A secret report reveals the likely source of the fatberg balls that closed a raft of Sydney beaches last summer - with most coming from the deepwater ocean outfall at Malabar.

The partly redacted scientific report, obtained by Guardian Australia under freedom of information laws, points to a combination of heavy rains and a buildup of fats, oils and greases as the likely cause of the “poo balls” being discharged from outfalls at Malabar, Bondi and North Head.

Source: Guardian - World News