Comet River at Comet Weir

1627 pesticide detections between Oct 2011 and Feb 2023

Diuron: 55 detections of Diuron between Oct 2011 and Jan 2023. 1.3ug/L (max 31/10/11). 0.0859ug/L (av.)

2,4-D: 142 detections of 2,4-D between Mar 2013 and Jan 2023. 2.8ug/L (max 17/7/16). 0.1314ug/L (av.)

Ametryn: 9 detections of Ametryn between Jun 2016 and Jun 2017. 0.0003ug/L (max 17/6/16). 0.0013ug/L (av.)

Atrazine: 208 detections of Atrazine between Nov 2011 and Feb 2023. 24ug/L (max 17/1/22). 0.6097ug/L (av.)

Chlorpyrifos: 2 trace detections of Chlorpyrifos between Jul 2017 and May 2019

Diazinon: 6 detections of Diazinon between Dec 2016 and May 2022. 0.0001ug/L (max 7/12/16). 0.00002ug/L (av.)

Fluroxypur: 145 detections of Fluroxypur between Jan 2015 and Jan 2023. 5.6ug/L (max 21/10/22). 0.2776ug/L (av.)

Haloxyfop: 67 detections of Haloxyfop between Jan 2013 and Jan 2023. 0.26ug/L (max 14/1/23). 0.0442ug/L (av.)

Hexazinone: 73 detections of Hexazinone between Dec 2011 and Dec 2022. 0.16ug/L (max 19/8/16). 0.0275ug/L (av.)

Imazapic: 71 detections of Imazapic between Feb 2016 and Jan 2023. 0.67ug/L (max 1/12/22). 0.0665ug/L (av.)

Imidacloprid: 13 detections of Imidacloprid between Jun 2016 to Jan 2023. 0.06ug/L (max 15/5/22). 0.0212ug/L (av.)

Isoxaflutole: 35 detections of Isoxaflutole between Feb 2015 and Jan 2023. 0.89ug/L (max 1/12/22). 0.1227ug/L (av.)

MCPA: 31 detections of MCPA between Jun 2015 and Dec 2022. 0.54ug/L (max 17/7/16). 0.0641ug/L (av.)

Metolachlor: 215 detections of Metolachlor between Dec 2011 and Feb 2023. 11ug/L (max 21/10/22). 0.5466ug/L (av.)

Metsulfuron Methyl: 31 detections of Metsulfuron Methyl between Jan 2015 and Jan 2023. 0.08ug/L (max 17/7/16). 0.0239ug/L (av.)

Metribuzin: 5 detections of Metribuzin between Dec 2022 and Jan 2023. 0.04ug/L (max 17/1/23). 0.032ug/L (av.)

Prometryn: 8 detections of Prometryn between Jan 2015 and Mar 2017. 0.12ug/L (max 29/1/15). 0.0307ug/L (av.)

Simazine: 134 detections of Simazine between Dec 2011 and Dec 2022. 7.3ug/L (max 17/7/16). 0.1632ug/L (av.)

Tebuthiuron: 251 detections of Tebuthiuron between Nov 2011 and Feb 2023. 4.7ug/L (max 14/11/21). 0.5789ug/L (av.)

Terbuthylazine: 109 detections of Terbuthylazine between Jul 2015 and Jan 2023. 28ug/L (max 21/10/22). 0.4231ug/L (av.)

Triclopyr: 17 detections of Triclopyr between Jan 2015 and Jan 2023. 1.1ug/L (max 14/1/23). 0.1889ug/L (av.)

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

2012-2013

Comet River at Comet Weir

Total Atrazine 41kg, Tebuthiuron 1.9kg

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

https://www.reefplan.qld.gov.au/measuring-success/paddock-to-reef/assets/2012-2013-gbr-catchment-loads-technical-report.pdf

2011: Large Scale Pesticide Monitoring Across Great Barrier Reef Catchments – Paddock to Reef Integrated Monitoring, Modelling and Reporting Program, 6 pesticides and two metabolites detected in Comet River: Atrazine, Desethyl Atrazine, Desisopropyl Atrazine, Hexazinone, Simazine, Tebuthiuron, Metolachlor, DEET.