Water Resources Market Information

Last reviewed:

In line with Ofwat’s Water Resources Market Information guidance, the information below has been provided to enable third parties to begin to identify opportunities and put forward proposals to us to supply water resources, or provide demand management or leakage services.

Our Trading and Procurement Code

The Trading and Procurement Code sets out how we approach water trading, setting out the policies, principles and requirements that will apply when we trade with appointed water companies and other service providers.

Our Water Resource Zones

For each of the six water resource zones (WRZ) within Thames Water’s area, we have provided information on key market factors plus our water resources position as set out in our revised draft Water Resources Management Plan. This information is in industry-standardised spreadsheets, for the dry year annual average (DYAA) and dry year critical period scenario (DYCP), and is based on templates provided by Ofwat. If you require more information or would like to clarify what we have published, please get in touch.

The information provided should help third parties to identify where to look for opportunities. However, it is really important that you come and talk to us about your proposal, as our network and the way we provide services to our customers is subject to a range of factors that can change how beneficial opportunities may be or how, when and where we might be able to use them. If you are interested in pursuing any commercial opportunities arising from this information, please email us with your details. 

Thames Water WRZ Boundaries

A boundary file of the six water resource zones can be found in the following zip file. The files can be imported to a Geographical Information System (GIS). A map of the relevant water resource zone can be found on the cover page of the data tables above.