You must view the following video. It explains in simple terms why the River of Grass and Lake Okeechobee are polluted.
The sugar companies have ruined the basis of our water supply now and in the future by fertilizing thousands of acres of sugar cane to create greater yields and —-greater profits at our expense. Cat tails and other flora incompatible with the ecology of the Everglades have ruined the largest source of our drinking water.