Numeric Nutrient Criteria (NNC) - Estuary Nutrient Regions
As part of the analyses conducted to derive nutrient standards for predominately marine waters, the Department evaluated the available water quality data for individual estuary systems and further subdivided these estuaries into homogeneous (with regard to nutrients, nutrient response variables, and salinity) segments or Estuary Nutrient Regions. Estuarine and marine areas for the estuaries listed in subsection 62-302.532(1), F.A.C., are delineated in the maps of the Florida Estuary Nutrient Regions, dated October 2014, which were incorporated into the rule by reference. These Estuary Nutrient Regions represent water segments over which the estuary-specific numeric interpretations of the narrative nutrient criterion in subsection 62-302.531(1), F.A.C., apply. Unless otherwise noted for a specific Estuary Nutrient Region, the criteria are expressed as concentration-based open water, area-wide averages. Numeric nutrient criteria do not apply to wetlands or to tidal tributaries that fluctuate between predominantly marine and predominantly fresh waters during typical climatic and hydrologic conditions unless specifically provided by name in subsection 62-302.532(1), F.A.C. The NNC Implementation Document(http://www.flrules.org/Gateway/reference.asp?No=Ref-02905) provides additional information describing the information and data needed to determine whether a location is within either a wetland or tidal tributary.
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