International Science Community Association Research Journal of Recent Sciences 2277-2502 7 8 2018 08 2 Modeling of trihalomethanes in the water distribution network of Brazzaville, Congo 1 10 EN Bernard NDOKI 1 Laboratoire de Génie des Procédés Industriels, ENSP, UMNG, BP 69, Brazzaville, Congo Laurent Matini 2 Laboratoire de Chimie, ENS, UMNG, BP 69, Brazzaville, Congo Marie Moutou Joseph 3 Laboratoire de Chimie, ENS, UMNG, BP 69, Brazzaville, Congo and Laboratoire de Chimie Minérale et Appliquée, FST, UMNG, BP 69, Brazzaville, Congo Grace IFO 4 Laboratoire de Chimie Minérale et Appliquée, FST, UMNG, BP 69, Brazzaville, Congo > Research Paper 2018 5 31 2018 08 2 The preparation of clean water from a hygienic point of view is one of the main challenges of our time. It is therefore essential to carry out an appropriate treatment of water, in order to avoid any risk to health. In this study, THMTs were identified and quantified in the drinking water distribution network during two sampling periods, namely September 2016 and March 2017, which represent the dry and rainy seasons respectively, with other parameters such as total organic carbon (TOC), temperature (T), pH, concentration of consumed chlorine (DCl), absorbance (UV 254nm), residual chlorine concentration (Cl2 res.), bromide ion (Br-) and ammonium ion (NH4+). THMT are mainly composed of chloroform, which accounts for 97% of THMT. The parameters for better prediction of THMT concentration were: TOC, T and DCI with a coefficient of determination R2 = 0.92. Copyright@ International Science Community Association