Professor Charles’ research focuses on how to advance drinking water safety for all, particularly in low resource environments, and addressing the additional challenges faced by climate change. She designed the water safety programmes for SafePani and for results-based contracts, operationalising water safety planning, and continues to develop these approaches based on collaborative learning with service providers, governments and users during implementation. Prof Charles collaborates with World Health Organization and UNICEF on advancing water safety for small water systems and climate resilient water supplies, including contributing to guideline development.