The Public Utilities Board (PUB), Singapores national water agency, ensures that all used water in Singapore is collected and treated at water reclamation plants to internationally recognised discharge standards. PUB also ensures that all new desalination and water reclamation projects are subjected to Environmental Impact Assessments if there is any discharge to the sea in accordance with our obligations under international law. This is to ensure that such discharge would have minimal or no impact on the marine environment

The National Environment Agency (NEA) also conducts regular water quality monitoring of inland water bodies and coastal areas to ensure that they meet the water quality standards. For example, coastal water samples are analysed for metals, total organic carbon, and other physical, chemical and bacteriological parameters. In 2013, Singapore also implemented Project Neptune, which enables real-time monitoring of coastal water quality.