Chlorophyll-a (average summer period) relevant for marine water only Dissolved inorganic Nitrogen relevant for marine water only Dissolved inorganic Phophorus Dissolved Oxygen Total Nitrogen Nitrite Nitrate Orthophosfate Total Phosphorus relevant for lakes only Secchi depth relevant for rivers and lakes only Biochemical Oxygen Demand in 5 days (preferred) relevant for rivers and lakes only Biochemical Oxygen Demand in 7 days