Journal of Geoscience and Environment Protection, 2019, 7, 212-231 http://www.scirp.org/journal/gep ISSN Online: 2327-4344 ISSN Print: 2327-4336 DOI: 10.4236/gep.2019.75017 May 30, 2019 212 Journal of Geoscience and Environment Protection Qualitative Assessment and Typology of the Water Resource Used for the Production of Drinking Water in Duékoué, Western Côte d’Ivoire Kouamé Kouakou Benoit 1 , Konan Kouakou Séraphin 1 , Attoungbre Kouakou Severin 2 , Konan Koffi Félix 2 , Boussou Koffi Charles 2 , Kouamé Kouamé Martin 2 1 Laboratory of Geosciences and Environment, University Jean Lorougnon Guédé, Daloa, Côte d’Ivoire 2 Laboratory of Ecology, Biodiversity and Evolution, University Jean Lorougnon Guédé, Daloa, Côte d’Ivoire Abstract The objective of this study was to evaluate the typology of water through phy- sicochemical and bacteriological characterization with the aim of highlighting its vulnerability as a drinking water resource. The methodology adopted was to evaluate the level of pollution by monitoring the spatiotemporal variation of the water pollution indicator levels of Lake Dohou. The sampling frequen- cy is monthly for one year, from November 2017 to October 2018, in order to obtain a fairly representative image of water quality and its seasonal evolution in eight (8) well-defined stations. The parameters were determined using the standard methods defined by the French Association for Standardization (AFNOR). This study shows that the waters are acidic, with an average pH of 5.81 and a low electrical conductivity of between 42.67 ± 4.30 and 59.62 ± 21.84 μS∙cm −1 . At all stations, seasonal mean water transparencies are low (<1 m). It is also noted that 99.7% of the water samples collected had total nitro- gen (TN) levels above the limit of 4 mg∙L −1 . All of the lake’s waters have non-compliant BOD5 (<3 mgO 2 ∙L −1 ) for raw water intended for the produc- tion of drinking water. Sites D6 and D7 have COD/BOD5 ratio greater than 3, which indicates the presence of non-biodegradable organic matter in these areas. Total coliforms, Escherichia coli and Enterococci were present in 100% (28/28) water samples at concentrations ranging from 2300 to 173,000 CFU/100 mL, from 100 to 1650 CFU/100 mL and from 20 to 1140 CFU 1/100 mL re- spectively. For Salmonella pathogens, they were detected in 50% of the dry season samples and in 100% of the rainy season samples. This almost perma- nent presence of this pathogenic germ denotes a poor quality of water with reference to this parameter. The presence of total coliform and other micro- How to cite this paper: Benoit, K. K., Séraphin, K. K., Severin, A. K., Félix, K. K., Charles, B. K., & Martin, K. K. (2019). Qualitative Assessment and Typology of the Water Resource Used for the Produc- tion of Drinking Water in Duékoué, West- ern Côte d’Ivoire. Journal of Geoscience and Environment Protection, 7, 212-231. https://doi.org/10.4236/gep.2019.75017 Received: March 26, 2019 Accepted: May 27, 2019 Published: May 30, 2019 Copyright © 2019 by author(s) and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/licenses/by/4.0/ Open Access