The Water Act 2003 created a competitive market for both retail (billing) and water supply in England and Wales.

The market allows business customers that use large amounts of water to choose their retail service supplier and their water supply service provider.

If you are a business water customer who uses more than 5,000m³ of water per year at a single premises, you may be eligible to choose your supplier.

More information about this market is available from Ofwat’s website using the following link

• Visit Ofwat's website

If you are licensed by Ofwat to supply this market, this page provides the following information via the downloads at the bottom of the page

• As a basis for negotiation, draft non price terms of access to supply water to Thames Water’s network (Wholesale Supply Agreement)
• Details of indicative prices for retail and supply access to Thames Water’s network and a common contract for retail access (Access Code)
• Details of how will we take forward any application you make and the service you can expect from us on receipt of your application (Access Code)
• Details of how we will protect and ringfence any commercial information you send to us (Condition R Compliance Code and draft confidentiality agreement)
• Application forms for specific types of access

If you  wish to contact us for further information contact details are provided below

Markets Team
Thames Water
Clearwater Court
Vastern Road
Reading
Berkshire
RG1 8DB

Email: competition@thameswater.co.uk