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
Jul 2023: Hexazinone <0.0001 – 0.4407ug/L
Oct 2023: Hexazinone <0.0001 – 0.0825ug/L
Jan 2024: Atrazine 0.98ug/L, Diuron 1.8505ug/L, Hexazinone 1.5004ug/L
Feb 2024: Atrazine <0.05ug/L – 0.4361ug/L, Diuron <0.076ug/L – 0.2438ug/L, Hexazinone <0.05 – 0.0611ug/L
March 2024: Hexazinone 0.1436ug/L
Source: Mackay Drinking Water Quality Management Plan 2017-18 + 2021/24
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