Southern Water reveals it is under further legal investigation

Southern Water has said that it is under investigation by England’s drinking water quality regulator over historic issues relating to its performance reporting, with a separate legal probe by the Environment Agency (EA) still ongoing.

“In a number of areas our historic performance has not been as good as our peers and we are working hard to make improvements,” acknowledged Southern’s chief executive, Ian McAulay, in his forward to the company’s annual report. “We have also been addressing historic challenges from our regulators Ofwat, the Drinking Water Inspectorate and [the] Environment Agency.”

In June, Ofwat ordered Southern to pay over £126m in fines and customer reimbursements after finding it had “deliberately misreported data” on the performance of its wastewater treatment works.

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