2011/2023: Baratta Creek at Northcote (Queensland). Pesticides: Multiple

Barratta Creek at Northcote (Queensland)

7313 pesticide detections between Aug 2011 and Feb 2023

Diuron: 736 detections of Diuron between Aug 2011 and Feb 2023. 8.9ug/L (max 18/10/17). 0.698ug/L (av.)

2,4-D: 579 detections of 2,4-D between July 2012 and Feb 2023. 20ug/L (max 10/11/15 & 18/12/16). 0.637ug/L (av.)

Ametryn: 425 detections of Ametryn between Oct 2011 and Jan 2023. 5.8ug/L (max 20/11/17). 0.0839ug/L (av.)

Atrazine: 734 detections of Atrazine between Aug 2011 and Feb 2023. 99.3% of all samples positive. 59ug/L (max 20/10/21). 3.084ug/L (av.)

Bromacil: 285 detections of Bromacil between Dec 2014 and Feb 2023. 10ug/L (max 24/4/21). 0.206ug/L (av.)

Chlorpyrifos: 2 trace detections of Chlorpyrifos between Nov 2021 and Jul 2022.

Diazinon: 9 detections (7 trace) of Diazinon between Apr 2017 and Jan 2019. 0.02ug/L (max 22/10/18). 0.0023ug/L (av.)

Fipronil: 25 detections of Fipronil between Dec 2016 and Jul 2020. 0.21ug/L (max 24/7/20). 0.0152ug/L av.)

Fluroxypur: 530 detections of Fluroxypur between Oct 2012 and Feb 2023. 16ug/L (max 27/10/20). 0.611ug/L (av.)

Haloxyfop: 246 detections of Haloxyfop between Jan 2013 and Jan 2023. 0.65ug/L (max 30/9/16). 0.068ug/L (av.)

Hexazinone: 207 detections of Hexazinone between Dec 2011 and Dec 2022. 1.2ug/L (max 1.2ug/L 25/8/15). 0.0522ug/L (av.)

Imazapic: 352 detections of Imazapic between Feb 2015 and Feb 2023. 0.46ug/L (max 31/8/21). 0.0482ug/L (av.)

Imidacloprid: 310 detections of Imidacloprid between Feb 2012 and Oct 2022. 1.3ug/L (max 23/9/14). 0.063ug/L (av.)

Isoxaflutole: 439 detections of Isoxaflutole between Nov 2011 and Jan 2023. 6.8ug/L (max 27/10/20). 0.288ug/L (av.)

MCPA: 489 detections of MCPA between Jul 2012 and Feb 2023. 34ug/L (max 27/10/20). 0.314ug/L (av.)

Metolachlor: 490 detections of Metolachlor between Oct 2011 and Feb 2023. 19ug/L (max 27/6/15). 0.247ug/L (av.)

Metsulfuron Methyl: 101 detections of Metsulfuron Methyl Oct 2012 and Jan 2023. 0.29ug/L (max 23/4/18). 0.0359ug/L (av.)

Metribuzin: 444 detections of Metribuzin between Jan 2013 and Jan 2023. 8.6ug/L (max 13/11/18). 0.418ug/L (av.)

Pendimethalin: 17 detections of Pendimethalin between Jan 2017 and May 2022. 0.23ug/L (max 23/5/20). 0.0635ug/L (av.)

Prometryn: 19 detections of Prometryn between Jul 2012 and Nov 2017. 0.02ug/L (max 24/12/15). 0.0058ug/L (av.)

Simazine: 183 detections of Simazine between Aug 2011 and Nov 2022. 0.22ug/L (max 13/12/14). 0.0222ug/L (av.)

Tebuthiuron: 443 detections of Tebuthiuron between Mar 2012 and Jan 2023. 0.32ug/L (max 8/1/23). 0.0458ug/L (av.)

Terbuthylazine: 134 detections of Terbuthylazine between Nov 2015 and Feb 2023. 12ug/L (max 9/11/20). 0.317ug/L (av.)

Triclopyr: 114 detections of Triclopyr between Jan 2013 and Jul 2022. 0.76ug/L (max 3/3/20). 0.0841ug/L (av.)

Source: Pesticide Reporting Portal – Queensland Government. https://storymaps.arcgis.com/stories/c0f0c6d7d88a4fd3a5541fe59f41ff75

Baratta Creek at Northcote

Ametryn 13kg, Total Atrazine 520kg, Diuron 80kg, Hexazinone 1.1kg, Tebuthiuron 0.049kg

Land Use Yield

Ametryn (Sugarcane) 0.098 kg/km2

Atrazine (Cropping, Forestry & Sugarcane) 3.4kg/km2

Diuron (Cropping, Horticulture & Sugarcane) 0.52kg/km2

Hexazinone (Forestry, Grazing & Sugarcane) 0.0015kg/km2

Tebuthiuron (Grazing) 0.000082kg/km2

Source: Reef Water Quality Protection Plan. Total Suspended Solids, Nutrients & Pesticide Loads (2012-2013) for Rivers that Discharge to the Great Barrier Reef – Great Barrier Reef Catchment Loads Monitoring 2012-2013


Baratta Creek at Northcote

Pesticides: Ametryn, Atrazine, Diuron, Hexazinone, Tebuthiuron, Metsulfuron Methyl, 2,4-D, Fluroxypyr, MCPA, Triclopyr, Metolachlor, Acifluorfen, Haloxyfop, Isoxaflutole, Bromacil, Fluometuron, Metribuzin, Prometryn, Simazine, Propazine-2-hydroxy, Metolachlor

An evaluation of the prevalence of alternate pesticides of environmental concern in Great Barrier Reef catchments: RP57C 2014
Rachael A Smith, Ryan Turner, Susi Vardy, Rae Huggins, Rohan Wallace, Michael St.J. Warne
Water Quality and Investigations, Environmental Monitoring and Assessment Sciences, Science Division, Queensland Department of Science, Information Technology, Innovation and the Arts.