Quantify current and projected water availability and quality deficits, assess the convergence of climate-driven scarcity with contamination-driven access loss, and evaluate the infrastructure interventions most likely to expand safe water access at scale.

UNICEF/WHO Joint Monitoring Programme data across 193 countries (2024), World Bank water stress index, NASA GRACE satellite freshwater depletion tracking, and integrated assessment models (GCAM, MESSAGE) for water-energy-food nexus. Cross-referenced with WHO health burden data attributable to water-related diseases.

5 billion lack safely managed sanitation. 7 billion people (60% of global population) will experience severe water scarcity for at least one month per year.

The convergence of scarcity and contamination is creating a compound crisis: groundwater depletion (India's aquifers declining 1 meter per year) combines with surface water contamination (only 20% of wastewater globally is treated) to eliminate safe water access despite formal 'water availability.'

Climate change is compounding this: 40% of current water stress is already attributable to anthropogenic climate change. The infrastructure deficit is staggering: $150B/year is needed to meet SDG 6 targets; current spending is $30B/year.