Fatbergs that closed northern Sydney beaches contained faeces, fresh testing reveals

Northern Beaches mayor hopes environment watchdog can identify source so they can stop this from happening at other beaches'

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Debris balls that closed nine northern Sydney beaches last week contained faecal matter, E coli bacteria and saturated fatty acids, test results show.

The Northern Beaches council said on Tuesday it had received further analysis of balls it sent to the New South Wales Environment Protection Authority (EPA) for testing.

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