On 5 August, Council staff discovered 100 dead fish at Claude Wharton Weir at Gayndah. This was reported to the relevant authorities and precautions taken. The fish were identified as Tilapia (an introduced invasive species), with no other fish species affected.
Water sampling and precautionary additional treatment of water for the township of Gayndah was undertaken.
Investigations have found no evidence of contamination which is a great outcome. Given that only Tilapia fish were affected, the likely cause of the incident was a sudden change in water temperature, which affects warm water species like Tilapia.
If you have further questions on this report please speak with our Environmental Health team on 1300 696 272.