1990: Lake Popiltah: Pesticides detected: Chlorpyrifos, Heptachlor, DDT

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Chlorpyrifos is also used extensively in agriculture and its residues can turn up in surprising places. Biodymanic farmer and standards officer David Williams found traces of it in cereals grown in the virgin soil of Lake Popiltah, south of Menindie on the Darling River. He also found heptachlor and DDT and surmised that flood waters must have deposited the poisons on the lake. Their source could only have been from cotton and other sprayed crops grown upstream. p68 Quick Poison Slow Poison. Pesticide Risk in the Lucky Country. Kate Short 1994