The objective of this study is to examine the applicability of (Quercus spp.) or Oak Leaves) as an environmentally friendly naturally occurring coagulant to reduce higher water turbidity and overall suspended solids by reducing the percentage (COD, BOD, TSS, TN, TP and ammonia) using the coagulation-flocculation method used ja The substitution by natural product components of organic and inorganic coagulants/flocculants may not only minimise ecosystem harm, but also improve the path to a new era of clean technologies and sustainable environments. The Egyptian wastewater treatment facilities have a total capacity of 5 million cubic metres per day and have been gathered from the Bilbeis drain between the City of Zagazig and Qalubeya in Egypt with support for the minister of households. Firstly, Oak Leaves powder was cleansed, rinsed with NaCl distilled water and salt solution, dried, crushed and afterwards finely sieved. The coagulation studies conducted by means of jar tests were different operating parameters such as pHs (2-9) and coagulant dosages (10-80 mg/L) and revealed an optimum coagulant dosage of Oak = 40 mg/L at pH 5, TDS = 78.8 mg/L and TSS = 92.33 mg/L and a reduction of 43.4 mg/l at an average turbidity of 52.20 NTU to 4 NTU. Summary of these investigations: to evaluate the interpretation of natural coagulant for waste water treatment, additional water quality indicators, such as hardness, Ec(electrical conductivity) and total alkalinity, were measured. In addition, this article focuses on where future study should concentrate on the use of green chemicals and natural goods to be used in water treatments for the purpose of a safe environment with sustainable applications in waste water treatment.