2017/23: Marian Water Treatment Plant (Queensland). Pesticides: Atrazine, Dinoseb, Diuron, Hexazinone, Metolachlor

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

Jan 2020: Atrazine 0.1688ug/L, Diuron 0.6946ug/L, 0.2664ug/L (raw water)

Feb 2020: Atrazine 0.5803ug/L, Diuron 0.8689ug/L, 0.3430ug/L (raw water)

Jan 2022: Atrazine 0.3579-0.5685ug/L, Diuron <0.0001-0.2038ug/L

Nov 2022: Hexazinone <0.0001-0.3715ug/L

Dec 2022: Atrazine <0.0001-1.29591ug/L, Diuron <0.0001-0.8355ug/L

Jan 2023: Atrazine <0.0001-0.7712ug/L, Diuron <0.0001-1.0157ug/L, Hexazinone <0.0001-0.3728ug/L

Feb 2023: Diuron <0.0001ug/L-0.1342ug/L

Source: Mackay Drinking Water Quality Management Plan 2017-18 + 2021/23

Marian Water Treatment Plant (Final Water Quality Data Summary – WTP Treated

2015/16: Atrazine 0.13ug/L, Atrazine <0.0001ug/L

Aug 2022: Atrazine <0.0001-0.1599ug/L

Jan 2023: Diuron <0.0001ug/L-0.0840ug/L, Hexazinone <0.0001-0.2096ug/L

Source: Mackay Drinking Water Quality Management Plan 2015/16+2022/23