What countries don't have clean water. and why?

Many countries struggle with access to clean water, particularly in regions like sub-Saharan Africa, parts of South Asia, and some areas in the Middle East. Factors contributing to this issue include inadequate infrastructure, pollution, climate change, and political instability, which can hinder effective management and distribution of water resources. Countries like Ethiopia, Nigeria, and Afghanistan face significant challenges in providing safe drinking water to their populations. Additionally, natural disasters can exacerbate existing water scarcity and contaminate available sources.