WaterCAN, the civil society movement, says it notes Johannesburg Water's latest update following a warning to residents in parts of the CBD and Bezuidenhout Valley not to drink tap water amid possible contamination. The group says the problem appears localised, with no reason for citywide panic. However, it stresses the need for urgent transparency, calling on Joburg Water to release test results without delay. WaterCAN adds that the incident highlights why municipalities must publish water quality data and support citizen scientists to protect public health. Bongiwe Zwane spoke to Dr. Ferrial Adam, Executive Manager at WaterCAN