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Service Description: The Numeric Nutrient Criteria are established to set allowable surface limits on nutrients (nitrogen, phosphorus, and floral response) in Florida's waters. The Rule's hierarchical approach gives preference to site-specific analyses that result in a numeric interpretation of the NNC. Site specific interpretations are generally deemed superior to more broadly applicable interpretations of the NNC because of the many natural factors affecting the expression of nutrient loadings on a given waterbody. If there is a site specific interpretation of the narrative, such as a Total Maximum Daily Load, Site Specific Alternative Criterion, Water Quality Based Effluent Limitation, or other Department-approved action that numerically interprets the narrative criterion (e.g., Reasonable Assurance derived values), that numeric interpretation is the applicable nutrient criterion. These numeric interpretations of the narrative criterion must establish the total allowable load or ambient concentration for at least one nutrient that represents achievement of a healthy, well balanced aquatic community. Each nutrient (nitrogen and phosphorus) is interpreted independently using this hierarchical approach; if the site-specific interpretation only addresses one nutrient, then the generally applicable numeric interpretations will apply for the other nutrient.If a site specific interpretation is not available, the Rule’s hierarchical approach then gives preference to numeric nutrient values based on quantifiable stressor-response relationships between nutrients and biological response (i.e., springs and lakes). If no quantifiable stressor-response relationship has been established, such as is the case for Florida streams, reference-based Nutrient Thresholds, in conjunction with biological information, are used to determine the applicable interpretation of the NNC. For those waters without a numeric interpretation under any of these approaches, the NNC continues to apply to the waterbody.
Map Name: NNC
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Description: The Numeric Nutrient Criteria are established to set allowable surface limits on nutrients (nitrogen, phosphorus, and floral response) in Florida's waters. The Rule's hierarchical approach gives preference to site-specific analyses that result in a numeric interpretation of the NNC. Site specific interpretations are generally deemed superior to more broadly applicable interpretations of the NNC because of the many natural factors affecting the expression of nutrient loadings on a given waterbody. If there is a site specific interpretation of the narrative, such as a Total Maximum Daily Load, Site Specific Alternative Criterion, Water Quality Based Effluent Limitation, or other Department-approved action that numerically interprets the narrative criterion (e.g., Reasonable Assurance derived values), that numeric interpretation is the applicable nutrient criterion. These numeric interpretations of the narrative criterion must establish the total allowable load or ambient concentration for at least one nutrient that represents achievement of a healthy, well balanced aquatic community. Each nutrient (nitrogen and phosphorus) is interpreted independently using this hierarchical approach; if the site-specific interpretation only addresses one nutrient, then the generally applicable numeric interpretations will apply for the other nutrient.If a site specific interpretation is not available, the Rule’s hierarchical approach then gives preference to numeric nutrient values based on quantifiable stressor-response relationships between nutrients and biological response (i.e., springs and lakes). If no quantifiable stressor-response relationship has been established, such as is the case for Florida streams, reference-based Nutrient Thresholds, in conjunction with biological information, are used to determine the applicable interpretation of the NNC. For those waters without a numeric interpretation under any of these approaches, the NNC continues to apply to the waterbody.
Copyright Text: FDEP, DEAR, Standards Development Section
Spatial Reference:
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Title: NNC
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Comments: The Numeric Nutrient Criteria are established to set allowable surface limits on nutrients (nitrogen, phosphorus, and floral response) in Florida's waters. The Rule's hierarchical approach gives preference to site-specific analyses that result in a numeric interpretation of the NNC. Site specific interpretations are generally deemed superior to more broadly applicable interpretations of the NNC because of the many natural factors affecting the expression of nutrient loadings on a given waterbody. If there is a site specific interpretation of the narrative, such as a Total Maximum Daily Load, Site Specific Alternative Criterion, Water Quality Based Effluent Limitation, or other Department-approved action that numerically interprets the narrative criterion (e.g., Reasonable Assurance derived values), that numeric interpretation is the applicable nutrient criterion. These numeric interpretations of the narrative criterion must establish the total allowable load or ambient concentration for at least one nutrient that represents achievement of a healthy, well balanced aquatic community. Each nutrient (nitrogen and phosphorus) is interpreted independently using this hierarchical approach; if the site-specific interpretation only addresses one nutrient, then the generally applicable numeric interpretations will apply for the other nutrient.If a site specific interpretation is not available, the Rule’s hierarchical approach then gives preference to numeric nutrient values based on quantifiable stressor-response relationships between nutrients and biological response (i.e., springs and lakes). If no quantifiable stressor-response relationship has been established, such as is the case for Florida streams, reference-based Nutrient Thresholds, in conjunction with biological information, are used to determine the applicable interpretation of the NNC. For those waters without a numeric interpretation under any of these approaches, the NNC continues to apply to the waterbody.
Subject: GIS features of the most recent numeric nutrient criteria applicable to Florida Waters. Features are organized by NNC hierarchy.
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Keywords: coastal,Environmental Monitoring and Modeling,inlandWaters,estuary,narrative,site-specific,TMDL,hierarchy 1,ditch,ENR,Water Resources (Inland),canals,tidal,Everglades,SSAC,NNC,WQBEL,open ocean,estuary nutrient region,Nutrient Watershed Region,streams,conveyance,water quality standards,environment
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