Hanoi, the capital city of Vietnam, faces many challenges in wastewater and faecal sludge management which are being intensified by water pollution and urban flooding. The rapid expansion of Hanoi has led to the inadequate management of the city’s wastewater and drainage system, causing damaging and costly floods. In line with the national strategy, Hanoi seeks to be water pollution and flood free by 2030. As a result, much attention has been drawn to wastewater and faecal sludge management.
Sewer pipes in Hanoi are mostly the combined type, collecting both wastewater and stormwater. This system was constructed between 1905 and 1945 during the French colonial period and covered the central part of Hanoi.
This case study details how sustainable urban drainage systems (SUDS) are contributing to urban flood mitigation. In addition, recognizing the potential and potential dangers of wastewater reuse for agriculture, authorities in Hanoi are developing institutional arrangements and policies to protect consumers, whilst enabling farmers to use nutrient-rich wastewater. Wastewater reuse, and its implication at policy level, is another focus of this case study.