John Libbey Eurotext

Environnement, Risques & Santé


Water supply, quality of resource and associated health risks in Korhogo (Northern Côte d’Ivoire) Volume 14, issue 3, Mai-Juin 2015


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1 Centre suisse de recherches scientifiques en Côte d’Ivoire
Km 17 route de Dabou
01 BP 1303
Côte d’Ivoire
2 Université Félix Houphouët Boigny
01 BP 1303
Abidjan 01
Côte d’Ivoire
3 Université Péléforo Gon Coulibaly
01 BP 1303
Abidjan 01
Côte d’Ivoire
4 Université Nangui Abrogoua
01 BP 1303
Abidjan 01
Côte d’Ivoire
5 Institut tropical et de santé publique suisse
Université de Bale
Socinstrasse 57
CH-4002 Bale
* Tirés à part

Access to safe water supply and sanitation in developing countries is challenging and this situation was aggravated in the city of Korhogo (Nord Côte d’Ivoire) due to huge climate variability during the decade 2000-2010. The objectives of the study are to : (i) characterize water access in Korhogo, (ii) determine the environmental and socio-sanitary factors which affect water's quality and availability, (iii) assess health risks associated to waters use. Two household surveys by questionnaire and two geographical surveys were conducted in 2010 in 600 households respectively during dry and rainy seasons. A health surveys and laboratory analyzes of water samples from wells and dam were performed. The quantitative microbial risk assessment (QMRA) was used to quantify the health risks associated with Escherichia coli and Giardia lamblia. It appears from this study that the stagnant wastewater and solid wastes are the potential risk factors for well-water pollution. Wells water is the main source of household's water supply in the city during the rainy season (60 %) and the dry season (65 %). The QMRA shows that there is a risk of E. coli infection due to wells and dam water. Annual probable infected cases are 2’002 ; 1’280 ; 59 ; and 24 persons respectively due to well-water consumption, gardening around the dam, fishing and swimming in the dam water. The results of this study are useful for the implementation of an integrated mitigation strategy of health risks due to water supply and hygiene deficiency that may increase with climate changes in the city of Korhogo.