WHO Updates Global Guidelines for Safe Drinking Water

WHO officials say the new guidance will help countries improve regulations, strengthen monitoring systems and develop more effective strategies to prevent contamination before it threatens public health.

The World Health Organization (WHO) has released updated global guidelines designed to help countries strengthen drinking-water safety and protect public health, as billions of people continue to face challenges accessing clean and safe water.

The revised Guidelines for Drinking-water Quality provide governments, regulators and water providers with the latest scientific evidence and practical recommendations for managing water quality risks. The update comes as an estimated 2.1 billion people worldwide still lack safely managed drinking-water services, including 106 million people who rely directly on rivers, lakes and other surface water sources for their daily needs.

WHO officials say the new guidance will help countries improve regulations, strengthen monitoring systems and develop more effective strategies to prevent contamination before it threatens public health.

Prevention and Risk Management Remain Central

The updated guidelines continue to promote a preventive approach known as the Framework for Safe Drinking-water, which focuses on identifying and managing risks before problems occur.

The framework is built around three key elements: setting health-based water quality targets, implementing water safety plans to manage risks throughout water supply systems, and conducting independent monitoring to ensure standards are being met.

WHO has expanded guidance on water safety planning based on lessons learned from countries that have successfully implemented these systems. The revised recommendations also provide additional support for small water supplies, which often face greater challenges in maintaining water quality.

The update highlights the important role governments play in establishing regulations, supporting oversight and ensuring that communities have access to safe and reliable drinking-water services.

Stronger Focus on Microbial and Chemical Risks

Microbial contamination remains the most significant threat to drinking-water safety globally. The new guidelines include updated information on a range of pathogens and offer stronger guidance on preventing waterborne diseases.

WHO has also introduced new fact sheets covering emerging viruses and expanded advice on managing risks in healthcare settings, where access to safe water is particularly important.

In addition, the revised edition updates information on certain chemicals found in drinking-water, including pesticides used in vector-control programmes. The recommendations reflect the latest scientific assessments and risk management practices.

Looking ahead, WHO has already begun preparations for a fifth edition of the guidelines. Future updates are expected to include detailed reviews of contaminants receiving growing international attention, including per- and polyfluoroalkyl substances (PFAS), often referred to as "forever chemicals," as well as disinfection by-products formed during water treatment processes.

WHO plans to support the rollout of the updated guidance through technical briefings, webinars and country-focused resources to help governments translate scientific recommendations into practical improvements that strengthen public health and expand access to safe drinking-water worldwide.