The Public Utilities Board (PUB) is a statutory board under the Ministry of Sustainability and the Environment of the Government of Singapore responsible for ensuring a sustainable and efficient water supply in Singapore.

The PUB regulates and oversees the country’s entire water supply system, which comprises the water catchment systems, drainage systems, water works, pipeline network, water reclamation plants and sewage systems. In April 2020, PUB was also appointed Singapore’s National Coastal Protection Agency.