Monitoring of the Physicochemical and Microbiological Quality of Water Produced and Distributed by La Congolaise Des Eaux (LCDE) in Brazzaville
Chemical Science International Journal, Volume 32, Issue 2,
Page 7-21
DOI:
10.9734/CSJI/2023/v32i2841
Abstract
Water is an essential element for all living beings and therefore deserves special attention to maintain its quality. The objective of this work is to monitor the physicochemical and microbiological parameters of the water produced and distributed by La Congolaise Des Eaux (LCDE) of Brazzaville in order to evaluate the risk on the health of consumers. Ninety (90) and eighty-five (85) samples were taken respectively in the southern and northern areas of the city of Brazzaville. These different samples were analyzed using physicochemical and microbiological methods.
The results obtained show that these waters have high temperature values, ranging from 27.88 and 28.10°C in the South and North zones compared to the WHO guideline value (25°C) and have a moderately acidic pH (6 ,20-7.00) in both areas.
The turbidity of the water is more pronounced in the southern zone (6.83 NTU) and is reflected in the absence of residual chlorine in the maximum number of sampling points with low mineralization. From a microbiological point of view, these waters show contamination with total germs, total coliforms and fecal coliforms. This contamination is more pronounced in the southern zone than in the northern zone. Thus, the factorial analysis shows contamination by total germs and indicator germs of fecal contamination (total coliforms and fecal coliforms) and reflects the lack of residual chlorine at the consumer's tap.
In view of the results obtained, this study shows that the ageing of the installations and the dilapidated state of the pipes of the LCDE have a negative impact on the quality of the water distributed, which constitutes a high health risk for the consumers.
- Monitoring
- tap water
- physico-chemical quality
- Brazzaville
- Congo
How to Cite
References
WHO. Quality guidelines for drinking water. 4th edition incorporating the first addendum. Geneva. 2017;564.
Castellarnau D.M., Genevaux C., Launay J., Lemenager M., Metayer S., Münger F., Orsenna E Vince F. Des Equipes de Solidarités International. Water, hygiene and sanitation barometer, international solidarity. 2021;25.
Boubou Bouziani N. Water management: environmental issue and sustainable development. Nature and Technology. 2015;8.
United Nations Educational, Scientific and Cultural Organization (UNESCO). Water in a Sustainable World, USA. 2015;8.
Nkounkou Loumpangou C., Louzayadio Mvouezolo R.F., Ayessou N., Elouma Ndinga A.M., Ngakegni-Limbili A.C., Codou G. M.D, Ouamba J-M. Water supply in the city of Brazzaville, Congo, European Scientific Journal. 2019;13(21):474-498.
Louzayadio Mvouezolo R.F., Nkounkou Loumpangou C., Foto E., Ayessou N., Codou G. M.D., Ouamba J-M. Hydrochemical quality and contamination of water distributed under pipelines in the city of Brazzaville (Congo). Africa Science. 2019;15(1):227-241.
Louzayadio Mvouezolo RF, Ayessou N, Nkounkou Loumpangou C, Tchoumou M, Mar Diop CG, Ouamba JM. Vulnerability to Microbiological Pollution of Tap Water and Groundwater Consumed in the Southern Zone of the City of Brazzaville (Republic of the Congo). International Journal of Environmental Monitoring and Analysis. 2021;9(5):152-161.
Ngoliele. A. Fifth national report on biological diversity. (Republic of Congo). 2014;131.
Vennetier P. Geography of Congo Brazzaville, higher education in Central Africa, Gautier-Villas-Paris. 1966;174.
Rodier J, Merlet N, Legube B. Water analysis. 9th edition Dunod, Paris. 2009;1579.
Gravellier A., Imbert A., Marchais H. Health risks associated with the production and distribution of drinking water at a high temperature, RENNES. 2007;69.
Chaouki I., Mouhir L., Fekhaoui M., El Abidi A., Bellaouchou A., El Morhit M. Application of principal component analysis (PCA) for the evaluation of the quality of industrial wastewater from Salam Gaz – Skhirat (Application of the principal component analysis (PCA) for the assessment of the wastewater industrial quality of the Salam Gas – Skhirat, Salam Gaz. J. Mater. Environ. 2015;6(2): 455-464.
Kahoul M, Touhami M. Evaluation of the physico-chemical quality of drinking water in the city of Annaba, Algeria. Larhyss Journal. 2014;9:1129-138.
Azonnakpo OV, Agbossou EK, Taofiki A. Physico-Chemical and Bacteriological Quality of Water in the Oueme Delta, Benin (Cotonou). International Journal of Progressive Sciences and Technologies (IJPSAT). 2020;20(2):391-411.
Guidelines for Canadian Drinking Water Quality: Federal-Provincial-Territorial Committee on Drinking Water of the Federal-Provincial-Territorial Committee on Health and the Environment. The pH of drinking water, Canada. 48.
Hanon M, Rouelle A. The pH of tap water. Environment portal of Wallonia, Belgium. 2011;37.
Zogo D, Bawa LM, Soclo HH, Atchekp DE. Elimination of color and turbidity of surface water by coagulation-flocculation with aluminum sulphate: case of water retention of the 'Okpara in the Republic of Benin. International Journal of Biological and Chemical Science. 2020;4(5):1667-1675.
Dahri N, Atoui A, Ellouze M, Abida H. Assessment of streambed sediment contamination by heavy metals: The cae of the Gabes Catchment, South-eastern Tunisia. Journal of African Earth Sciences. 2018;140:29-41.
Amadi AN. Quality Assessment of Aba River Using Heavy Metal Pollution Index. American Journal of Environmental Engineering. 2012;2:45-49.
Levi Y. The parameters influencing the development of germs in drinking water networks, Technique Science et Méthode. 1995;240-245.
Sydney MS, Coffi Yalo N, Ahamide B, Daouda M. Study of the degradation of free residual chlorine concentration in drinking water in Benin case of the commune of Cotonou, Int. J. Biol. Chem. Science. 2020;14(9):3372-3390.
Kouakou Konan S, Goue DL, Ohou-Yao MJ, Kouassi Kouame I, Kouakou Kouassi L, Kouamé BD. Chemical quality of the drinking water of the populations of the city of Soubre (south-west, Ivory Coast), Int. J. Adv. Res. 2007;6(1):58-65.
NF EN ISO 19458. Water quality - Sampling for microbiological analysis; 2006.
Louzayadio Mvouezolo R. F. Study of the quality of water consumed by the populations of the City of Brazzaville, single doctoral thesis, Faculty of Science and Technology, Marien Ngouabi University. 2019;198.
National Office for Water and Aquatic Environments (ONEMA). Asset management of drinking water networks. 2016;10.
Expertise Center for Environmental Analysis of Quebec (CEAEQ). Search and simultaneous enumeration of faecal coliforms and Escherichia coli in drinking water with MI culture medium; membrane filtration method, Quebec, 2009b;20.
Kaiser H.F. The application of electronic computers to factor analysis. Educ. Psychol. Meas., 1960;20:141-151.
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