Marian Water Treatment Plant (Raw Water)

November 2017: Atrazine 0.4478ug/L, Diuron 0.5744ug/L, Hexazinone 0.1073ug/L, Metolachlor 0.1248ug/L

December 2017: Atrazine 0.8298ug/L, Diuron 1.4509ug/L

January 2018: Atrazine 0.4404ug/L, Diuron 0.3382ug/L

February 2018: Atrazine 1.1076ug/L, Diuron 1.5455ug/L, Hexazinone 0.4357ug/L

March 2018: Atrazine 0.1891ug/L, Diuron 0.8048ug/L, Hexazinone 0.4098ug/L

April 2018: Diuron 0.1434ug/L

May 2018: Dinoseb 0.001ug/L

Source: Mackay Drinking Water Quality Management Plan 2017-18