A fisheries biologist with the Iowa Department of Natural Resources says Iowa’s fourth largest natural lake went through a number of changes this past year. Ben Wallace says last spring the water in Storm Lake was exceptionally clear.

The water in Storm Lake was green for several weeks, according to Wallace.

Wallace says the water levels in Storm Lake were lower due to the drought and that exacerbated algae growth.

Wallace made his comments during a presentation to the Storm Lake City Council.