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The global crisis regarding inadequate safe drinking water affects millions due to factors like poor infrastructure, environmental degradation, and natural disasters. To address this, water purification technologies, including filters that eliminate bacteria, viruses, and heavy metals, are crucial. The thesis focuses on analyzing five water purification methods, considering their effectiveness and competence. It examines various water sources in Bangladesh, highlighting issues like excessive microorganisms and contaminants in tap water. The study aims to promote affordable, sustainable purification systems, acknowledging the drawbacks of certain technologies. Findings reveal issues with tap and boiled water while other methods effectively remove contaminants.