HAB's occur in natural and man-made water bodies from excess of phosphorus and nitrogen compounds. Sources are both natural and man-made. When concentrations of these compounds increase from either or both  man-made and natural  sources, then these excesses  may  result in  HAB blooms. HAB such as Microcystis aeruginosa cause both human and wildlife negative impacts.

St. Lucie West, a 4,700 acre Development of Regional Impact [DRI] employed  my former firm Wetlands Management, Inc. [WMI] for a 10 year period. This DRI, a public 298 project, monitors the fertilizer level in their perimeter discharge lakes. Since  2011, this project has created water quality equal to the Total Maximum Daily Loads  [TMDL] concentration for phosphorus in  the nearby receiving St. Lucie River.