International Science Community Association Research Journal of Recent Sciences 2277 - 2502 5 2 2016 February 2 Pollution of Well Water of Some Areas of the Municipality of Abomey-Calavi, Benin 12 24 EN V. Rani 1 Dept. of Biotechnology, Shoolini University of Biotechnology and Management Sciences, Solan, Himachal Pradesh, India K. Dev 2 SagnonParfait Hounsinou1 1 1Laboratoire d’Hydrologie Appliquée, Faculté des Sciences et Techniques (FAST), Université d’Abomey – Calavi, 01 BP: 526 Cotonou, Benin Daouda Mama 2 Laboratoire de Chimie Inorganique et de l’Environnement (LACIE), Faculté des sciences et techniques (FAST), Université d’Abomey – Calavi,01 BP : 526 Cotonou, Benin Abdoukarim Alassane 3 Laboratoire d’Etude et de Recherche en Chimie Appliquée (LERCA), Ecole Polytechnique d’Abomey – Calavi (EPAC), Université d’AbomeyCalavi,Benin Nicaise Yalo 4 Etienne Sagbo 5 Boukari Moussa 6 Dominique Sohounhloue 7 > Research Paper 2014 9 19 2016 February 2 For the monitoring and control of waterborne diseases, a five-month-prospective-study run from January to March 2012 and from January to February 2013 which objective is the preliminary assessment of the hygienic quality of well water used for drinking and also for domestic activities by residents of some areas of Abomey-Calavi was conducted. A total of 20 water samples collected at 20 wells suspected to be a risk to the health of their users. Bacteriological lab tests reveeled a pollution of all the water wells due to bacteria such as thermotolerant coliforms, intestinal enterococci and total coliforms. This shows that these waters may be responsible for the spread of waterborne diseases. 60% of these waters are polluted by Escherichia coli. The relationship between thermotolerant coliforms and intestinal enterococci showed that the origin of fecal contamination is human-like in 50% of wells, animal type in 5% of the wells and mixed (human and animal) in 5% of the wells studied. Physico-chemically, 50% of water wells tested have a pH lower than normal, all well water analyzed have a redox potential higher than normal and concentrations of lead and zinc in accordance with WHO standards. Copyright@ International Science Community Association