But five years on, Mr Griffiths, the group’s secretary, said they had been continually “frustrated” by further incidents which have since gone unpunished.
“We’ve had people fly-tipping bags of rubbish, and I know of cases where sheep have been killed from eating them,” he said.
“We’ve had broken glass on the common, and the farmers getting together to clear it – there were four bin bags full of bottles and things like that.”
While councils are responsible for clearing fly-tipping from public land, they do not have to clear waste from private land.
Since Bridgend Council’s last prosecution for fly-tipping, neighbouring authority Neath Port Talbot had brought forward 139 cases, with the vast majority resulting in fines.
Over the same period, Welsh government data indicates that Cardiff Council made 206 prosecutions, while Rhondda Cynon Taf had a total of 143.
But the picture across Wales is mixed, with many recording only a handful of prosecutions a year – and Anglesey Council having none going back almost two decades.