Hi Craig, the ultimate source is from Dairy farms north of Lake Okeechobee and the fact that the lake is polluted and due to the dikes has a lot of sediment and not enough flow through. The Dikes were built long ago (in the 30s) to drain the land south to make way for farms and housing developments.

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Hi Craig, the ultimate source is from Dairy farms north of Lake Okeechobee and the fact that the lake is polluted and due to the dikes has a lot of sediment and not enough flow through. The Dikes were built long ago (in the 30s) to drain the land south to make way for farms and housing developments.