More than 25 million Bangladeshis drink water containing arsenic levels that exceed WHO safety standards. This environmental poisoning remains one of the world's largest mass exposures to a carcinogenic substance, yet progress in mitigation remains alarmingly slow.
Chronic arsenic exposure causes skin lesions, respiratory disease, and multiple cancers—particularly bladder and lung cancers. Northern Bangladesh faces the worst burden with 68% of wells contaminated, contrasting sharply with central regions where 45% exceed safe limits. The poorest communities, lacking resources for treatment systems, bear the highest health toll.
Current interventions—well switching, household filters, and piped water systems—have helped some communities, but coverage remains incomplete. Rapid expansion of safe water access in high-burden districts is urgent, as each year of exposure adds to the disease burden of preventable cancers and chronic illness.