Check out this recent paper by Dr. Glenn A. Coldren and researchers from Villanova University and Smithsonian Environment Research Center on work at Kennedy Space Center.
"The water quality of the lake is at an all-time crisis level and human health, the environment and the regional economy are suffering as polluted lake water is discharged to the estuaries."
"The water management system in South Florida is designed, engineered and operated to provide flood protection and water supply, but it obviously is being controlled to support the profit-driven agricultural industry around Lake Okeechobee."
"Discharges of water from Lake Okeechobee totaled 832 billion gallons in 2017." Read the editorial by Florida Oceanographic Society's executive director, Mark Perry.