Hydrogeochemical characterization and natural background level determination of selected inorganic substances in groundwater from a semi-confined aquifer in Midwestern Burkina Faso, West Africa

Sako, Aboubakar; Ouangaré, Cheik Abba Cissé

doi:10.1007/s10661-023-11127-7

Cited by 4 publications

(1 citation statement)

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“…Previous studies in the region have reported microbiological pollution, high levels of mineralization, and much higher concentrations of nitrate and nitrite than the maximum limits set by WHO standards [16,17]. In Burkina Faso, previous studies carried out on the quality of groundwater have focused on heavy metal and chemical contamination in rural areas and the midwestern part of the country [18,19]. However, a recent study by Faye et al [20] detected microbiological contamination as well as chemical deterioration in groundwater quality in the southwest part of the country.…”

Section: Introductionmentioning

confidence: 99%

Microbiological and Physicochemical Quality of Groundwater and Risk Factors for Its Pollution in Ouagadougou, Burkina Faso

Traoré,

Kpoda,

Dembélé

et al. 2023

Water

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Ouagadougou is a city with three million inhabitants and an increasing demand for water of sufficient quality. New boreholes are drilled to match demand, but their protection from anthropogenic contamination is insufficient. To assess the quality of urban groundwater in Ouagadougou for the first time, a total of 32 borehole water samples were collected and assessed for bacteriological and physicochemical features using established methods. Health risk inspections and hazard assessments were undertaken at sampling sites to identify potential hazards and contributing factors. Statistical analysis was used to identify associations between risk factors and water pollution. The study revealed poor quality of groundwater in Ouagadougou with major nonconformities related to total coliforms, Escherichia coli, and turbidity. Water samples from 19 boreholes (59%) were contaminated with coliforms, and 11 (34%) with E. coli. Additionally, Pseudomonas aeruginosa, Enterococcus, and anaerobic sulphite-reducing bacterial spores were detected. Deviations from physicochemical quality requirements were observed for water turbidity, pH, nitrate, fluorine, and iron. Risk analysis showed the major high-risk practices to be sludge spreading or having a garbage heap, a latrine, a septic tank, or dirty water near a borehole. Based on these results, for public health protection, authorities must take strict measures to prohibit such practices around these important sources of drinking water in Ouagadougou.

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