Lakes under warning-level status for blue-green algae include: Lake Shawnee, Shawnee County. Frazier Lake, Grant County. Lakes under watch-level status for blue-green algae include: Council Grove ...

In 2024 the swimming leg was cancelled after it was confirmed blue-green algae was present in Castlewellan Lake. Mr Campbell said they were told "at the very last minute", by Newry, Mourne and ...