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 were (0.15l/sec and 0.1l/sec). Optimum dose of Mangifera indica seeds extract revealed a pronounced efficiency for removing bacteria and algae from water but it gives a greenish color for the produced water. Both Moringa oleifera and Prunus armeniaca water seeds extract have high efficiency in removing total algae count (as well as different algae groups) more than bacterial indicators.