‘Serious concerns’ over Yorkshire Water’s sewage treatment works says regulator Ofwat

Water regulator Ofwat said it has "serious concerns" over the sewage treatment works of five water suppliers, including Yorkshire Water.

Anglian Water, Northumbrian Water, Thames Water, Wessex Water and Yorkshire Water submitted reports in December which worried the regulator, it said.

"The data that emerged at the end of last year suggested widespread shortcomings in how water companies were running sewage treatment works. The first phase of our investigation suggests those concerns are credible," said Ofwat interim boss David Black.

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"We have identified shortcomings in most water and wastewater companies and are continuing to investigate.

Yorkshire Water submitted a report in December which worried the regulator.

"But we have already seen enough in five companies to cause serious concern and warrant us taking further action."

Ofwat said that the information it was sent in December raised one of several concerns for each company.

Either it reported a large number of wastewater treatment works which might not be meeting their environmental rules, raised concerns about how the company meets environmental obligations, or did not show the company's workings.

"We will now dig deeper into what these five companies have been doing, with the prospect of formal enforcement against them if we find they are failing on obligations Ofwat enforces," Mr Black said.

"We will have further questions for all companies on this.

"In the meantime, we expect them to make quick progress in addressing any potential non-compliance they might have, whilst strengthening how they manage their environmental obligations as a whole."

Earlier this year MPs on the Environmental Audit Committee said that England's rivers had become a "chemical cocktail" of sewage, agricultural waste, and plastics.

Southern Water was handed a record £90m fine for 6,791 unpermitted sewage discharges last summer. Ofwat said on Wednesday that it was keeping an eye on Southern Water's compliance package.

Only one water company - Hafren Dyfrdwy - did not report any treatment works that potentially did not meet a specific set of rules in the environmental permits.

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