Florida has had post-development stormwater treatment requirements in place since the early 1980’s. During the development of those rules, the performance standard was set at 80% average annual load reduction of TSS, and, based of field data, best management practice design criteria were established that provide a rebuttable presumption of compliance that stormwater discharges met the requirements. Since that time, additional research (see Harper and Baker, 2007) has shown that standard BMPs do not reduce nutrients by 80% as presumed. This draft rule was prepared by the Florida Department of Environmental Protection and the five water management districts, with the assistance of an industry working group, to provide design criteria for meeting the 80% reduction target for nutrients. The standards include the application of BMP treatment trains and advanced treatment technologies. Click on the link below to download a full copy of the draft report.