To ask His Majesty's Government what steps they are taking to support the restoration of water supply in areas of Surrey left without water following Storm Ciarán; and to ensure that the impact of similar future incidents is minimised.
Answered on
21 November 2023
During 4 and 5 November, the effects of Storm Ciarán caused Thames Water’s Shalford Water Treatment Works in Guildford to shut down. Approximately 20,000 properties in Guildford had their water supply disrupted. Most properties were back on supply on 8 November and mains water supply has now been restored to all impacted properties.
Defra officials were in close contact with Thames Water throughout the incident to ensure appropriate support was provided to impacted customers. This included the opening of three bottled water stations, and regular deliveries to vulnerable customers.
On 9 November Defra’s Environment Minister, Rebecca Pow, spoke with Cathryn Ross, joint CEO Thames Water, to discuss lessons and seek assurances that further mitigations will be implemented to avoid future incidents. This was followed up with a further conversation on Tuesday Nov 14. Thames Water is also producing a detailed report for the Drinking Water Inspectorate, who will undertake a full assessment.
Ensuring water companies have strong levels of resilience is a Government priority, as set out in our Plan for Water published in April 2023. Earlier this year, regional water resources groups and water companies, including Thames Water, consulted on their draft Water Resource Management Plans. Within their plans, water companies must consider all options, including demand management and water resources infrastructure for at least the next 25 years.
Water companies are also using the £469 million made available by Ofwat in the current Price Review period (2020-2025) to investigate strategic water resources options, which are required to improve the resilience of England’s water supplies. Ofwat also recently announced that water companies are bringing forward £2.2 billion for new water infrastructure delivery, over the next two years, with £350 million worth of investment in water resilience schemes. Thames Water has committed to invest in building a new 9km water transfer pipeline to connect parts of the Guildford area to an alternative source of water. Works are scheduled to start in early 2024.
The Government and regulators will continue to closely monitor Thames Water’s performance and will not hesitate to hold them to account if they fall short.