But things have changed for the better.
The Area Of Concern, or AOC, was a label given to Presque Isle Bay back in January of 1991.
The reason was the bay was so polluted with contaminants from factories and runoff.
The Presque Isle Public Advisory Committee met Monday morning to further discuss delisting the bay as an Area Of Concern.
The committee voted last July, 13 to 7, to recommend the bay be taken off the watch list.
DEP officials say the water quality in the bay has improved by leaps and bounds over the years and delisting the bay is a good idea.