Evaluation of the Physico-Chemical Parameters of Water from Boreholes, Wells, Taps and the Milo River: Case of the Kankan Urban District

Abstract

The aim of this work is to evaluate the quality of water from: boreholes, wells, taps and Milo river in the urban municipality of Kankan. Sampling campaign was carried out at nine sites based on the frequency of water usage by the population. Physical parameters were measured in situ and chemical ones were performed using the colorimetric method. The results showed that electrical conductivity (464 - 703 μS), pH (5.10 - 5.75) and turbidity (15.53 - 22.88 NTU) as well as the temperatures recorded respectively from ordinary well water, boreholes, and Milo river do not comply with Standards. The results of the chemical parameters of the water showed that the concentration of nitrite ions (0.02 - 2.20 mg/L) is very high in tap water, while borehole water has high concentrations of ammonium ions (0.26 - 0.6 mg/L), nitrate ions (56 - 129 mg/L), and lead ions (0.05 mg/L). Phosphate ions (11 - 20 mg) are abundant in ordinary wells and the Milo River, while zinc ions (3.71 - 4.42 mg/L) and iron (II) ions (0.5 mg/L) are found in greater concentrations in ordinary wells and the Milo River respectively. These results show that most of these water sources are polluted. The Stata 15 software was used for statistical analysis of data and the correlation test between the chemical parameters gave very significant values (r = 0.80; p < 0.05).