Senator McCARTHY (Northern Territory) (14:46): Before I ask the question, I acknowledge the Lord Mayor of Darwin, Kon Vatskalis, who is in the gallery. My question is to the Minister for Defence, Senator Payne. Some residents in Katherine have been told not to drink their water supply due to PFAS contamination originating from RAAF Base Tindal, with water having to be trucked in for residents. When did the minister first become aware that PFAS contamination in Katherine was of such concern that residents would be advised not to drink the water?