Water in Cities & Sanitation
Urban water supply, wastewater treatment, and sanitation are among the greatest public health achievements — and ongoing challenges — of modern societies.
Cities concentrate millions of people in relatively small areas. Providing clean drinking water and safely managing wastewater is essential for health, dignity, and economic activity. Rapid urbanisation continues to test these systems worldwide.
Urban Water Supply
Cities typically draw water from rivers, lakes, reservoirs, or aquifers, treat it to drinking standards, and distribute it through extensive pipe networks. Reliability depends on source protection, treatment capacity, and the condition of infrastructure.
Sanitation and Wastewater
Collecting and treating sewage prevents the spread of disease and protects rivers and coastal waters. Modern wastewater treatment removes solids, organic matter, nutrients, and pathogens. In many places, treated wastewater is increasingly reused for irrigation, industry, or even indirect drinking water supply.
Growing Challenges
- Ageing pipes and leakage in older cities
- Expanding informal settlements with limited services
- Climate-driven droughts and floods stressing systems
- Rising demand from population and economic growth
Safe urban water and sanitation remain unfinished business in many parts of the world — and a continuous task of maintenance and improvement everywhere.