Trade effluent is any liquid waste that is discharged into our sewers from a business or industrial process, excluding domestic sewage such as that from toilets, bathing or handwashing. We need to control anything like this entering public sewers, so it’s safely handled and treated before it's returned to the environment.
For non-household customers, such as businesses, charities or public sector organisations, your retailer should be your first point of contact. You can find more information on the Market Operator Services Ltd (MOSL) website.
By law, our consent is needed for any discharge of trade effluent into our sewerage network, and to comply with this you’ll need to use the following guidance.