Safe and reliable drinking-water supply depends on effective risk management, informed technology selection, and strong regulation.

The new WHO Compendium of drinking-water systems and technologies offers a comprehensive reference for engineers, planners, and decision-makers to strengthen drinking-water supply systems—from source to consumer.

Taking a whole-of-system approach, the Compendium links technology choice to health targets, promotes risk-based management, and supports equitable, resilient, and sustainable services.