Cows have been spotted in the Tukituki River despite efforts to discourage farmers from the practise after the gastro outbreak in August.
Photographer Tim Whittaker was driving back from a job last week and saw up to 60 cattle walking in the river.
"I pulled over and took a photo of it and uploaded it on to my Facebook page and it got a lot of attention, it sort of went nuts."
Mr Whittaker said he was annoyed and upset to see people not toeing the line.
"I live in Hastings and am passionate about the water issue. I am worried, as time goes on, it will become a thing of the past and we will forget about it. I put uploaded the photo so it stays in peoples' minds."