Case Studies Matching Nutrient "chlorophyll-a" Defining Natural Conditions Chlorophyll-aNitrogenPhosphorus Lakes & Reservoirs Wisconsin Lake Phosphorus Criteria Chlorophyll-aPhosphorus Lakes & Reservoirs Nutrient-Enriched Waters Designation Chlorophyll-aPhosphorus Lakes & Reservoirs NC Lakes and Reservoirs Chlorophyll-a Lakes & Reservoirs Classification of MN Lakes Chlorophyll-aNitrogenPhosphorus Lakes & Reservoirs Reference Condition Regional Nutrient Strategy Chlorophyll-aNitrogenPhosphorus Lakes & ReservoirsStreams & Rivers Estuarine Criteria in Florida Chlorophyll-aNitrogenPhosphorus Estuaries & Coasts Mechanistic ModelingReference ConditionStressor Response