Christian Walder

Water Supply and Sanitation Specialist, Sustainable Development and Climate Change Department

Christian is excited about infrastructure financing and the application of innovative, high-level technologies for urban development projects. Before joining ADB in 2018 he worked in the private sector on projects in Central and Eastern Europe, Namibia, Egypt, and India in the various fields of urban water management: water supply, municipal and industrial wastewater treatment, and plant operations.

Tracking COVID-19 in sewage could be an effective way to monitor the spread of the virus in densely populated urban areas. Photo: Thijs Degenkamp

A novel approach to tracking COVID-19

Testing sewage for the coronavirus could provide vital clues to its spread in areas where mass testing is difficult

Christian Walder, Neeta Pokhrel

People living in informal settlements, often near the edges of large cities, are among the most in need of access to clean, safe water and toilets. Photo: ADB

Many people take toilets for granted. More than a billion in Asia don’t have that luxury

Investments in safe, adequate and affordable water, sanitation, and hygiene facilities must be sustained and result in improved services and a less polluted environment for everyone, particularly the poorest and most vulnerable in Asia and the Pacific.

Christian Walder, Lu Shen, Isabel Blackett