Water treatment in Egypt's El-Sharkia governorate is the focus of this investigation. There are more questions about the long-term safety of the ecosystem and human health when using conventional water purifying technologies. Traditional techniques employ aluminium sulphate (alum) as a water coagulant. Alzheimer's disease and other neuropathological illnesses have been linked to aluminium in several studies. Plant-based coagulants like M. oleifera are environmentally safe, non-toxic, and the most promising and cost-effective solution for water treatment. The seed extract of M. oleifera is used as a water coagulant in the new water treatment technology. Using the Jar test, alum and M. oleifera are compared as coagulant agents. The Belbeis Water Treatment Station collects the water samples throughout the course of a year, in all four seasons (2019-2020). For both raw and treated water, the evaluation of physicochemical and microbiological characteristics was conducted. More importantly, iron and manganese concentrations were reduced as well as overall bacterial population. Using M. oleifera as a biocoagulant for water purification is recommended by real testing.