The global map of Countries with Limited Access to Safe Drinking Water (2025) highlights persistent challenges in Africa, South Asia, Latin America, and Southeast Asia. These regions face structural constraints such as rapid population growth, limited water infrastructure, contamination of natural sources, and insufficient operational capacity.

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Biological water treatment technologies represent one of the most effective, scalable, and cost-efficient pathways to improve water safety in low-resource environments. These systems leverage natural microbial processes to remove organic pollutants, pathogens, nutrients, and trace contaminants, enabling communities to secure reliable potable water at lower operational cost. 

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