ASSESSMENT OF THE PHYSICOCHEMICAL AND BACTERIOLOGICAL QUALITY OF GROUNDWATER IN THE KOSSODO INDUSTRIAL ZONE, BURKINA FASO

In Burkina Faso, groundwater is an essential resource for drinking water, irrigation, and industry, especially during the dry season. In the Kossodo industrial zone, it supplies 95% of the water needs of both the population and industries, but its quality is a concern due to pollution. This study aims to assess the physico-chemical and bacteriological quality of seven boreholes in the area and to propose corrective measures to reduce health risks. Physico-chemical results show temperatures between 28 and 31.25 C, turbidity ranging from 0.13 to 1.45 NTU, a slightly basic pH (6.74 -7.48), and low conductivity (261 -462 uS/cm). All parameters comply with WHO and ONEA standards, except orthophosphate (0.5 0.8 mg/L). Microbiological analyses reveal the presence of faecal coliforms (F2: 17 CFU/100 mL; F5: 38.5 CFU/100 mL; F6: 15 CFU/100 mL) and faecal streptococci (F5: 1 CFU/100 mL; F6: 0.5 CFU/100 mL), while E. coli is absent. These results highlight the importance of regular monitoring and the implementation of corrective measures to preserve groundwater quality and minimize health risks.