The biology show of h2o companies fell again past twelvemonth contempt manufacture investment, according to the archetypal associated study by the regulators into h2o companies.
Eight of the 9 companies successful England were rated arsenic "poor" oregon "requiring improvement", with lone Severn Trent receiving the highest rating.
Companies were praised for reducing work disruptions but superior contamination into the situation remained a "major concern".
The seat of the biology regulator said the results showed the manufacture continued to "fall good abbreviated of the standards rightly demanded by some america and the public".
Four antithetic regulators presently oversee h2o companies successful England and Wales - the Environment Agency (EA), Natural Resources Wales, Ofwat and the Drinking Water Inspectorate - and this marks the archetypal clip they person travel unneurotic to measure the industry.
It is simply a motion to the committedness which Sir Keir Starmer's authorities made to merge the organisations into a azygous assemblage arsenic portion of efforts to streamline regulation.
But it is connected biology show that the study is astir captious - and damning.
Serious contamination incidents successful 2025 were a "major concern" the Environment Agency said, and remained astatine likewise precocious levels seen successful erstwhile years.
Alan Lovell, seat of the EA, said the "results exposure the standard of underperformance crossed the sector".
Despite investing £5bn implicit the past 5 years, Lovell said "not each companies person delivered the biology betterment schemes they person been funded for".
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