Prevalence of water-related diseases and groundwater (drinking-water) contamination in the suburban municipality of Mont Ngafula, Kinshasa (Democratic Republic of the Congo)

• Published in: Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2019-07, Vol.54 (9), p.840-850
• Main Authors: Kapembo, Michel L., Al Salah, Dhafer Mohammed M., Thevenon, Florian, Laffite, Amandine, Bokolo, Mathieu K., Mulaji, Crispin K., Mpiana, Pius T., Poté, John
• Format: Article
• Language: English
• Subjects: cholera; Coliforms; Contamination; Defecation; Domestic water; Drinking water; drinking water quality; Dry season; E coli; Electrical conductivity; Electrical resistivity; Epidemiology; Fecal coliforms; fecal indicator bacteria; Groundwater; Groundwater pollution; Health care facilities; human risk; Microorganisms; Neighborhoods; Nitrogen dioxide; Overflow; Parameters; pollution; prevention; Rainy season; Runoff; Sanitation; Sanitation systems; SDG 6; Septic tanks; Streams; Suburban areas; tropical conditions; Water analysis; Water consumption; Water pollution; Water quality; Water resources; Water sampling; Water wells; Waterborne diseases
• ISSN: 1093-4529; 1532-4117
• DOI: 10.1080/10934529.2019.1596702

An epidemiological survey conducted among users of water points and medical institutions in the N'djili Kilambu neighborhood of Kinshasa in Democratic Republic of the Congo, indicates that waterborne diseases have already affected more than 60% of the patients admitted to local clinics between 2013 and 2017. In order to raise public and political awareness about this hazardous health issue resulting from the lack of safely managed sanitation systems, this study investigates the microbial quality of drinking water from local water resources. Water samples were collected from nine wells and streams used as drinking sources, and analyzed for Fecal Indicator Bacteria (FIB), including Escherichia coli, Enterococcus, and Total Coliforms. Physicochemical parameters (pH, electrical conductivity, O 2 , and soluble ions (Na + , K + , PO 4 3- , SO 4 2- , NO 3 - , NO 2 - ) were also analyzed. Except for NO 3 - and NO 2 - , the average concentrations of the physicochemical parameters and dissolved ions generally meet the guidelines for drinking/domestic water quality. By contrast, the results reveal high levels of FIB in the water samples collected during both dry and wet seasons. The contamination is significantly higher during the wet season compared to dry season, due to increased runoff, open defecation practices, and more frequent overflow of onsite sanitation systems and septic tanks.