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Roya, B.N., Roya, H., Rahman, K.S et al., “Principal component analysis incorporated water quality index modeling for Dhaka-based rivers”. City and Environ. Inter. 23: 100150. 2024.

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Assessment of Water Quality from the Mani River, the Water Source of the Yalenzou Water Supply System in N'Zérékoré Prefecture, Guinea

1Department of Hydrology, Faculty of Science and Technique, University of N’Zérékoré, P.O Box 50, N'Zérékoré, Guinea

2Department of Natural Resources Management, Faculty of Environmental Sciences, University of N'Zérékoré, P.O Box 50, N'Zérékoré, Guinea;Laboratory of Hydrobiology and Wetland Research, Department of Zoology, Faculty of Sciences and Technology, University of Abomey-Calavi, Cotonou, Benin

3Department of Zoology and Entomology, Faculty of Natural and Agricultural Sciences, University of the Free State, Private Bag ×13, Phuthaditjhaba 9866, South Africa

4Department of Environmental Engineering, Faculty of Environmental Sciences, University of N'Zérékoré, N’Zérékoré, P.O Box 50, N'Zérékoré, Guinea

5Department of Natural Resources Management, Faculty of Environmental Sciences, University of N'Zérékoré, P.O Box 50, N'Zérékoré, Guinea

6Department de Mathematiques, Centre Universitaire de Zérékoré, BP: 50, N’Zérékoré, Guinea

7Laboratory of Hydrobiology and Wetland Research, Department of Zoology, Faculty of Sciences and Technology, University of Abomey-Calavi, Cotonou, Benin


American Journal of Water Resources. 2026, Vol. 14 No. 1, 27-31
DOI: 10.12691/ajwr-14-1-4
Copyright © 2026 Science and Education Publishing

Cite this paper:
Richard Adande, Michel Mathurin Kamdem, Herman Léonce Zinsou, Mamadouba Sylla, Lancei Koivogui, Aboubacar Cissé, Oumar Alpha Baldé, Edmond Sossoukpè. Assessment of Water Quality from the Mani River, the Water Source of the Yalenzou Water Supply System in N'Zérékoré Prefecture, Guinea. American Journal of Water Resources. 2026; 14(1):27-31. doi: 10.12691/ajwr-14-1-4.

Correspondence to: Richard  Adande, Department of Hydrology, Faculty of Science and Technique, University of N’Zérékoré, P.O Box 50, N'Zérékoré, Guinea. Email: adanderich@gmail.com

Abstract

High concentrations of chemical elements and bacteria (enteropathogenic bacteria) in water can cause waterborne diseases that are potentially dangerous to humans without prior effective treatment. The aim of this study was to evaluate the physico-chemical and bacteriological quality of the water from the Mani River and the Yalenzou water supply system in order to establish the occasional presence of contaminants. Water was sampled from March to May 2025 (towards the end of the dry season and the beginning of the rainy season), which corresponds to the increase in surface water. Results showed significant differences (P<0.05) in conductivity, total dissolved solids (TDS), salinity and biological oxygen demand (BOD5) among the two sampling sites. Mani River recorded the highest mean value of BOD5 (191.33±1.52 mg/L versus 189±3.00 mg/L). Fecal coliforms in the Mani River and raw water of Yalenzou water supply system were 332.33±17.61 and 165±5.00 CFU/100mL respectively. These values were far above the minimum standards set by the World Health Organization (3 coliforms/100 mL of water). Iron, turbidity, nitrite, temperature and salinity characterized the raw water from the water supply system, whereas conductivity, turbidity, salinity, BOD5, fecal and total coliforms characterized water from the Mani River. This study highlights the level of contamination of the Mani River and the questionable quality of water consume in households of the forest region, Guinea.

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