Greywater reuse: Risk identification, quantification and management Academic Article uri icon


  • Onsite decentralised treatment of greywateris becoming a popular alternative source of water for non-potable uses such as landscape irrigation, toilet flushing as well as washwater for various purposes. Greywater reuse can significantly decrease domestic water consumption, while alleviating stress from existing water resources and contributing to sustainable water use. However, inappropriate reuse of greywater might negatively affect the environment and human health, as it often contains a range of pathogens (bacteria and viruses) as well as substances with the potential to induce environmental consequences such as soil hydrophobicity (repelling water), accumulation of salts and damage to plants. Treatment is therefore needed for safe greywater reuse. Unlike large treatment systems, maintenance of small onsite greywater systems (eg, a single-family home) is usually …

publication date

  • October 15, 2014