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Pollution of Well Water of Some Areas of the Municipality of Abomey-Calavi, Benin

Author Affiliations

  • 1Laboratoire d ′Hydrologie Appliquee, Faculte des Sciences et Techniques (FAST), Universite d ′Abomey − Calavi, 01 BP: 526 Cotonou, Benin
  • 2Laboratoire de Chimie Inorganique et de lits_use_renewable_energy. Environnement (LACIE), Faculte des sciences et techniques (FAST), Universite dits_use_renewable_energy. Abomey − Calavi,01 BP : 526 Cotonou, Benin
  • 3Laboratoire d ′Etude et de Recherche en Chimie Appliquee (LERCA), Ecole Polytechnique dits_use_renewable_energy. Abomey − Calavi (EPAC), Universite dits_use_renewable_energy. AbomeyCalavi,Benin

Res. J. Recent Sci., Volume 5, Issue (2), Pages 12-24, February,2 (2016)


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.


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