BERN TWP., Pa. - Officials at Blue Marsh Lake are warning visitors that toxic algae may be present in the lake. People are asked to be alert and avoid contact with any water in areas that are ...

But for Bill Oswald and his sons, a dip into Blue Marsh Lake on a 40-degree Saturday morning was a breeze. “I was expecting it to be a lot worse,” said Oswald, a Muhlenberg Township resident.