Vol. 7, Issue 1, Part B (2025)

Natural radioactivity is a public health issue, particularly in regions where water resources are potentially contaminated by radioactive elements. The city of Kolwezi, in the Democratic Republic of Congo, being located in an area rich in minerals, raises concerns about the quality of its drinking water. Among the radioactive isotopes present in the environment, radium-226 (Ra-226) is of particular attention because of its harmful effects on human health, particularly because of its ability to cause cancer. 
This study aims to assess natural radioactivity and radium-226 concentration in drinking water in the city of Kolwezi, Democratic Republic of Congo. Known for its rich mining subsoil, Kolwezi faces significant environmental challenges, including contamination of its water resources by radioactive elements. 
The research method involves collecting water samples from various sources, including wells, rivers and urban supplies. Each sample is submitted to a specialized laboratory where radioactivity analyses are performed. The results are then compared to standards set by the World Health Organization (WHO) for acceptable levels of radium-226 in drinking water. Initial observations indicate significant variability in radium-226 concentration levels, with some samples exceeding safety thresholds. This situation raises major public health concerns, including increased risks of diseases related to exposure to radioactivity. 
In conclusion, the study highlights the need for regular monitoring and preventive measures to protect the population of Kolwezi from the harmful effects of natural radioactivity in water resources. This work also opens avenues for future research on sustainable water management and community awareness of water quality issues.