Water market reform

For businesses, charities and public sector organisations, the water and wastewater retail market is now operational. You can find out more about the changes and what it means for your business below and in our frequently asked questions.

The market overview

The non-household market has been designed so that any non-household customer can choose which retailer they'd like to buy water and wastewater services from. The below illustration will give you an idea of the market and the flow of services and information.

Background on retail market reform

Since April 2017, non-household customers have been able to choose their preferred retailer, or if eligible, ‘self-supply’. More information on how to choose a retailer and self-supply can be found on the for customers page on the Open Water website.

For a more in-depth background on the market please click here.

Becoming a retailer

To act as a retailer for eligible customers, you'll need to have a Water Supply and Sewerage License (WSSL) from Ofwat. A WSSL allows you to buy wholesale services to sell to your end customers.

More details on how to connect with your wholesaler can be found on the Open Water website.

Contracting with Thames Water

We have a dedicated service desk in Wholesale Market Services who are available to answer your questions and help you through the process of signing a contract with us.

You can contact us here.