Unsafe Sanitation

Unsafe Sanitation is one of the modifiable risk factors tracked by the IHME Global Burden of Disease Study. The attributable deaths shown here represent the estimated number of deaths that could be prevented if exposure to this risk factor were eliminated or reduced to optimal levels. Understanding risk factor contributions helps prioritize public health interventions and policy decisions.

Risk factor attribution uses comparative risk assessment methodology. A single death may be partially attributed to multiple risk factors, so attributable death counts should not be summed across risk factors. Data covers 204 countries from 1990 to the latest available year.

Unsafe sanitation — the lack of access to improved sanitation facilities that hygienically separate human excreta from human contact — contributes to approximately 775,000 deaths annually from diarrheal diseases, intestinal nematode infections, and other enteric conditions. An estimated 3.5 billion people lack safely managed sanitation services, and approximately 420 million still practise open defecation. Sub-Saharan Africa and South Asia have the lowest sanitation coverage. Inadequate sanitation contaminates water sources, food, and the environment with faecal pathogens, driving a cycle of infection, malnutrition, and impaired child development. Beyond direct health effects, unsafe sanitation undermines women's safety and dignity, impedes educational attendance (especially for adolescent girls), and perpetuates poverty. The economic losses from inadequate sanitation are estimated at $260 billion per year globally.

Unsafe Sanitation contributes to mortality from diarrheal diseases, typhoid, cholera, intestinal parasites. The magnitude of impact varies by country depending on exposure levels, population demographics, and the availability of preventive and treatment services.

Investment in sanitation infrastructure — from basic pit latrines to sewered systems — is the foundation. Community-led total sanitation (CLTS) approaches have successfully eliminated open defecation in many communities through social mobilisation rather than hardware subsidies. Faecal sludge management, wastewater treatment, and safe reuse of nutrients close the sanitation value chain. School sanitation programmes improve educational outcomes. SDG 6 targets safely managed sanitation for all by 2030, requiring a fourfold acceleration of current progress.