UK Water Regulator Finds Severn Trent Breached Wastewater Duties

UK water regulator Ofwat found that Severn Trent Plc had “serious failings” in how it deals with wastewater and sewage as part of a broad investigation into practices of utilities in the sector.

Ofwat didn’t impose a fine on Severn Trent, which had already identified problems and invested £98 million ($131 million) to address the issues before the regulator opened its case, according to a statement on Wednesday. The regulator has been conducting a broad investigation into how utilities handle wastewater that has so far resulted in more than £300 million of enforcement packages and fines.

“Our investigation found serious and unacceptable breaches by Severn Trent Water — that is not in question and the company accepts it,” Lynn Parker, senior director for enforcement at Ofwat, said in the statement. “But their response to those failures sets a standard we expect from all companies: identifying the problem, proactively investing to fix it, and cooperating openly with the regulator.”

Utilities are in some cases allowed to dump sewage into Britain’s natural waterways when rain overwhelms the wastewater network. But they have been found to be systematically spilling even on dry days. Ofwat said in its statement that Severn Trent failed to provide proper drainage and deal with the contents of its sewers.

Severn Trent recorded a 41% reduction in spills per storm overflow in 2025 compared with the previous year thanks to investments such as additional capacity at 65 wastewater treatment sites, storm tank enhancements and increased storage.

Ofwat still has two cases open in its wastewater investigation.

Photograph: Sewage is discharged into Earlswood brook from the nearby treatment works, run by Thames Water on April 13, 2023 in South Earlswood, England. (Photo by Dan Kitwood/Getty Images)

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