The proposed rules establish numeric interpretations of the narrative surface water quality criterion for nutrients in paragraph 62-302.530(47)(b), F.A.C., for streams, lakes, spring vents, and specific estuaries in Southwest and South Florida. These interpretations, which are Florida water quality standards, are intended to fully protect the designated use of surface waters. A new type of Site Specific Alternative Criteria (Type III) is also established that is specifically tailored to address nutrients and nutrient response variables.