2015 August: Cockburn Reservoir (SA). Pesticides: Metsulfuron Methyl, Simazine Center map Traffic Bicycling Transit Get Directions Cockburn Reservoir (non-potable?) 25 August 2015: Metsulfuron Methyl 0.08ug/L, Simazine 0.7ug/L Source: SA Water FoI 2016