Pierce Brosnan has issued a plea on social media to Meath County Council.
He has joined a campaign to stop plans to install a waste water pipe into the River Boyne.
Pierce said "Water is our most precious natural resource. 70,000 people get their drinking water from the River Boyne. The River Boyne is also one of the most important sites for salmon in Eastern Europe and home to rare plant species. I grew up on the banks of the River Boyne. Waste from the Dawn Meats abattoir should not be discharged into the River Boyne. I appeal to the Meath County Council to protect the River Boyne and their community".