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Our History

Many significant milestones and industry-first’s have shaped Castle Water into the UK’s largest independent water retailer.


  • The Water Act 2014 is passed by Parliament
  • Castle Water starts up


  • Acquires business customers of network owners Portsmouth Water – 16k SPIDs


  • Acquires business customers of network owners Thames Water – 513k SPIDs


  • Business water market opens in England
  • Holds first annual customer conference
  • Acquires Cobalt Water – 7.5k SPIDs
  • Launches partnership with Save the Children
  • Awarded contract for Crown Commercial Services


  • Opens second office in Boat Brae, Blairgowrie
  • Acquires business customers of South East Water – 52k SPIDs
  • Launches online customer self-serve portal
  • Winner ‘Business of the Year’ Courier Business Awards


  • Winner ‘Service Business of the Year’ Courier Business Awards
  • Rebrand


  • Awarded ISO 9001 certification
  • Acquisition of Affinity for Business – 75k SPIDs
  • Adopts new state of the art billing system


  • Receives 10,000th 5 Star review on Trustpilot
  • Wins Ofwat’s inaugural Water Breakthrough Challenge for Innovation
  • Wins Save the Children’s ‘Outstanding Support for Children in Emergencies’ award
  • Wins Customer Service Award at Perthshire Chamber of Commerce Star Awards


  • Launches ‘Customer in Control’ payment option
  • Awarded ISO 27001 certification