Where companies fail to meet their obligations, we have enforcement powers under the Water Industry Act 1991. To secure compliance and change behaviour we can obtain legally binding undertakings and impose enforcement orders. For the most serious contraventions we can impose financial penalties on companies.
Enforcement cases
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Enforcement case into Dŵr Cymru's management of its sewage treatment works and sewerage network
5 June 2026
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Clear Business Water Customer Protection Code of Practice undertakings
26 March 2026
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Investigation into Southern Water’s wastewater treatment sites and the company’s reporting of relevant compliance information to us
5 February 2026
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Enforcement case into Wessex Water's management of its sewage treatment works and sewerage network
16 December 2025
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SES Business Water Limited – undertaking under section 19 for breaches of the Retail Exit Code
3 November 2025
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Enforcement case in South West Water's management of its sewage treatment works and sewerage networks
9 September 2025
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Enforcement case in Anglian Water's management of its sewage treatment works and sewerage networks
9 September 2025
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Enforcement case in Northumbrian Water's management of its sewage treatment works and sewerage networks
4 June 2025
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Enforcement case in Thames Water's management of its sewage treatment works and sewerage networks
28 May 2025
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Enforcement case into Thames Water's compliance with its obligations under Licence Condition P30
28 May 2025