Who we are

Who we are

We, Thames Water Wholesale, are part of the Thames Water Group and we are the UK’s largest water and wastewater wholesale service provider. We provide water and wastewater wholesale services to retailers, business customers, new appointments and variations (NAVs), other wholesalers and other third parties.

We operate across London and the Thames Valley and are responsible for the abstraction, storage, treatment and distribution of your water services, as well as the collection, treatment and disposal of your wastewater services.  We are responsible for a network of over 20,000 miles of water pipes and 67,000 miles of sewer – enough to wrap around the earth 3.5 times.

If you are a non-household customer, under the new market arrangements your retailer will sell water and wastewater services to you.

Our supply area

Doing business with us

Wholesale Market Services are the commercial and customer service link between Thames Water and purchasers of water and wastewater wholesale services. We're here to make sure you receive the best possible service and experience when doing business with us. We're committed to working with you to ensure we support and help facilitate competition in the new market and continuously work to improve the services we deliver.

Find out more 

If you’re a retailer, business customer, new appointment and variation (NAV), other wholesaler, or a third party wanting to know more about becoming a customer please visit our contact us page. 

Our team is here to answer your questions and help you understand more about our business.