• Rafat Moustafa
• Ali M. Hassan
• Hamdi A. Hammad
• Ali M. Abdullah

In the poorest regions in the world, there are more than 783 million people who live without access to clean water (UNICEF, 2016). The earliest Egyptians used to drink the Nile water after purification and the groundwater without disinfectants or sterilization when the pathogens circulating in the drinking water were rather few. In many countries; Aluminum Sulphate still being used for many of water purification and treamtmen processes such as turbidity removal due it is coagulation properties. Due to the organic material is obviously present in water; Certain types of chlorine can react with certain organic molecules, forming hazardous compounds. The water were collected for 30 cm under water from Zeftta drinking water plant, Gharbia Governorate, Egypt.Next, all characteristics of physical and chemical nature has been idenf=itified before use in expermintes. This study aimed to highlight the effect of chlorine dose on hazardous organic material formation. The study resulted in the chlorine dose is one of the major parameters in hazardous organic material formation with significant increase in HAAs and Tri Halo Methanes THMs, with the chlorine dosage increase. (p- Values were 0.001, 0.004 and 0.002 for (THMs), DiChloro Acetic Acids (DCAAs) and Tri Chloro Acetic Acids (TCAA) respectively. Thus, chlorine dose in drinking water chlorination process had a major influence on HAAs and THMs levels and must be controlled efficiently.

Organic; hazardous; drinking water; chlorine; NOM..

"Effect of Chlorine dose in formation of Disinfection By-Products in Drinking Water", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 10, page no.f8-f12, October-2021, Available :http://www.jetir.org/papers/JETIR2110502.pdf

"Effect of Chlorine dose in formation of Disinfection By-Products in Drinking Water", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 10, page no. ppf8-f12, October-2021, Available at : http://www.jetir.org/papers/JETIR2110502.pdf