John Mahoney lives in Stansbury Park he told ABC4 News, "The water has turned green, it looks nuclear and the fish have been dying."
Besides the color, the other major problem the dead fish.
John Mahoney took this picture of his neighbor steve clearing out dead fish in their back yard.
Steve Mcconell said, "I've lived here for six years and people call it winter kill, but I have never seen all the big fish die"
The two men have been dealing with the mess for over a month.
But it isn't just an eye sore, there is a health concern. The lake is everyone's back yard.
John Mahoney said, "My concern is the people who swim, boat in it, fish in it."
The question now: why?
Stansbury Park Service Agency told ABC4 News Reporter Emily Clark that it is natural for a man made lake to react this way after such a cold winter.
The ice on the top of the lake basically deprived oxygen from the fish, killing them.
But Steve and John just don't buy that.
Mahoney said, "They say it is a natural thing, but this looks anything but natural."
The service agency told ABC4 News as the weather continues to warm up, the lake should go back to normal. ABC4 News will keep you posted on this developing story.