Bifenthrin was found in water, sediment and crayfish samples from Hazelbrook Creek, the Environment Protection Authority says
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An insecticide was the cause of a major crayfish kill in the Blue Mountains last month, the New South Wales environmental regulator has confirmed.
About 1,000 dead and dying giant spiny crayfish were found in a tributary of Hazelbrook Creek, near Horseshoe Falls, by a tour guide.
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