The Department of Environmental Protection proposes to establish numeric surface water quality criteria for nutrients and associated standards, such as chlorophyll a. Numeric nutrient criteria and associated standards will be used in determining impairment of surface water quality under Chapter 62-303 of the Florida Administrative Code. https://www.flrules.org/Faw/FAWDocuments/FAWVOLUMEFOLDERS2009/3504/3504doc.pdf pp. 441-43.