Ofwat also issued penalties of £47million to Yorkshire Water and £17million to Northumbrian Water.
Thames, facing the record fine, has been struggling with £14.7billion debts. It said last month it only had enough cash to fund operations until the end of next May.
The regulator can fine firms as much as 10% of annual sales. In the case of Thames, the biggest water supplier, the proposed fine is 9% which Ofwat chief executive David Black said "reflects the severity of the offences".
He added: "Ofwat has uncovered a catalogue of failure by Thames Water, Yorkshire Water and Northumbrian Water in how they ran their sewage works and this resulted in excessive spills from storm overflows.
This story is from the August 07, 2024 edition of Daily Express.
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This story is from the August 07, 2024 edition of Daily Express.
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