As part of the deal, Thames Water will be a Tier Three sponsor and will provide all water utility and waste water services at London 2012 venues, ensuring clean, reliable tap water and sanitation to the Games.

Thames Water has already won a contract with the Olympic Delivery Authority (ODA) to build the UK's biggest ever black water recycling plant on the edge of the Olympic Park, which per year will conserve the equivalent of up to 83 Olympic-sized swimming pools of water, treated to drinking standards.

The facility, set to be completed this October, will produce 570,000 litres of water from Londoners' sewage for non-drinking purposes including the heating and cooling of the Olympic Park's Energy Centre.

"We are thrilled to welcome Thames Water to the London 2012 sponsorship family, their expertise and attention to detail will ensure our venues are not just operational at Games time but are world class theatres for spectators to see athletes from across the globe compete at the greatest show on earth," said London 2012 commercial director Chris Townsend. 

Thames Water, which serves London and the Thames Valley, is Britain's biggest water utility services and sewerage company.

They are the 25th Tier Three supplier and provider.

London 2012 now has a total of 39 domestic sponsors. 

"It is fitting that as the UK's biggest water utility company we should provide our essential service to the London 2012 Olympic and Paralympic Games," said Martin Baggs, the chief executive of Thames Water said.

"Water is a precious resource, which we must use wisely - and we are glad London 2012 recognises this as it plans to deliver a sustainable Games."

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