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Five submerged hydrophytes flourished in north east Nile Delta have been chosen to be the subject of this study. These are Ceratophyllum demersum, Myriophullum spicatum, Potamogeton crispus, P. nodosus and P. pectinatus .They were growing at three different hydric habitats (kafr Demira irrigating canal, El Gammalia with agricultural chemicals and contaminants and Manzala Lake with both organic and inorganic pollutants. This study goals are: a) providing quantitative estimates about the environmental conditions (both physical and chemical characteristics of the bottom sediments and overlying...