1980 – 1981 December: Broken Creek. Pesticides detected: Dieldrin, 2,4-D

Agricultural Chemicals Committee (15th meeting 1980?): (I) Waters of Broken Creek. Pollution Control Section of the State Rivers and Water Supply Commission requested analysis of 6 waters from various locations in the Broken Creek near 2 country towns. Trace residues of Dieldrin were detected in all samples 0.01micrograms per litre. A total of 0.16micrograms per litre was present in one sample.

2 December 1981 SRWSC: Sampling of 2,4-D residues Arrowhead Weed Spray Program. “Inspection of Broken and Nine Mile Creeks with EPA representatives 26/11/81. “They did not express their original concern about the possibility that the figure of 0.004mg/L for continuous exposure of 2,4-D to aquatic organisms may be exceeded. Their main concern at this inspection was that some verification of our mathematical arguments was now necessary because the use of 2,4-D in a domestic water supply was an extremely contentious issue…”