Thames Water has awarded a £500 million renewable energy contract.
Business electricity supplier, Haven Power, will provide green energy to the water company as part of a five-year contract.
There is an option for two further five-year renewals which could increase the overall value of the contract to more than £1.5 billion over 15 years, Thames Water said.
Angus Berry, Thames Water Energy Manager said the programme will help the company work towards their 2020 target of “self-generating 30% of our own electricity”.
He added: “Our energy and carbon strategy focuses around reducing costs for customers and minimizing our impact on the environment. This deal with Haven puts downward pressure on bills and means we will now be using 100% renewable electricity.”
Thames Water provides water and wastewater services to 15 million customers across London.