1986 March – 1998 September: Hougraves Weir (SA). Pesticides detected: Chlorthal-Dimethyl, Simazine, DDE

Houlgraves Weir Onkaparinga River – Pesticide detections.

1998 September 24 Chlorthal-Dimethyl 0.07ug/L

1998 September 24 Simazine 0.84ug/L

Pesticide Contamination of South Australian Waters

Appendix 4

Pesticides in Sediment – Concentration ug/kg – dry weight

Onkarparinga River – Houlgraves Weir

14/3/86: DDE 39, Sum DDT 39