Hazzard calls for urgent action on Castlewellan Lake following growth of blue-green algae Speaking after a visit to Castlewellan Lake this morning (Tuesday 13 5 25), Sinn Féin’s South Down MP Chris Hazzard said: “There are growing concerns about the presence of blue-green algae in Castlewellan Lake. “This has once again disrupted the annual Mourne … Continue reading Blue-Green Algae At Castlewellan Lake Worrying: Hazzard