The treatment of water to render it fit for human consumption has became a problem of central
importance. Hence, there is a need for inexpensive and easy methods to purify drinking water. The present
work aimed to study the efficiency of environment friendly plant seeds extract as a coagulant agent for
removing pollutants . Optimum dose of different water extract of Moringa oleifera (150 mg/l), Mangifera
indica (Mango seeds) (30mg/l) and Prunus armeniaca (Apricot seeds) (30mg/l) were used as a coagulant
in a semi pilot system. The system was followed by roughing filter and sand filter and operated at two
flow rates we re (0.15l/sec and 0.1l/sec). Optimum dose of Mangifera indica seeds extract revealed a
pronounced e ffic iency for removing bacteria and algae from water but it gives a greenish color for the
produced water. Both Moringa oleifera and Pru n u s a rmeniaca water seeds extract have high efficiency
in removing total algae count (as well as different algae groups) more than bacterial indicators .