2012 March – 2013 March: Gawler River (Ulverstone Tas): Pesticides detected: Metsulfuron Methyl, MCPA.

GAWLER RIVER AT WEST GAWLER ROAD (#14208)

7/3/12: Metsulfuron Methyl 0.11ug/L

12/3/13: MCPA Trace

Source: Pesticide Water Monitoring Program – Routine Monitoring Results (Tas Govt)

https://dpipwe.tas.gov.au/Documents/Baseline%20Monitoring%20Program.pdf