Bangladesh’s contaminated well water is considered one of the largest public health crises in the world. An estimated 40 million people — one quarter of the population — are exposed to drinking water contaminated with arsenic.

Bangladesh, is the world's most climate-vulnerable country, affected by plenty of climate-related hazards every year, mostly along its south-western coast. As a consequence, many people relocated from these regions to Khulna city, and began to live as slum dwellers where they xperience significant water scarcity, insufficient drainage systems, a lack of toilets, tube wells, and bathing facilities, inadequate hygiene management, a lack of core skills required for urban jobs, low payment, and an income shortage.