The water company Severn Trent has been spared a fine by the industry regulator despite “serious and unacceptable breaches” in its handling of wastewater and sewage. Ofwat, which has been investigating how wastewater and sewage networks are managed across the industry, found that the FTSE 100 company had breached its duties by failing to effectively provide drainage and deal with the contents of its sewers.
But unlike the seven previous cases in Ofwat’s industry-wide investigation – which resulted in fines and enforcement packages worth more than £300m, including a £104.5m fine for Thames Water – Severn Trent avoided a penalty. The watchdog said the company had taken “genuine accountability” by proactively identifying problems in its own network and beginning to put them right before an enforcement case was opened in July 2024.
“Severn Trent avoids fine for serious wastewater failures after proactive investment leads to 41% spill reduction.”
Lynn Parker, Ofwat’s senior director for enforcement, said: “Our investigation found serious and unacceptable breaches by Severn Trent Water – that is not in question and the company accepts it. But their response to those failures sets a standard we expect from all companies: identifying the problem, proactively investing to fix it and co-operating openly with the regulator.”
Severn Trent, which supplies water to more than eight million people across England and Wales, invested £98m of shareholder funds into improving its infrastructure. The investment included additional capacity at 65 wastewater treatment sites, storm tank enhancements, increased storage at storm overflows, and £26m of nature-based solutions in Mansfield, Nottinghamshire. This has led to a 41% reduction in spills from each storm overflow in 2025, compared with 2024, despite heavier rainfall than other regions.
Parker added: “The 41% reduction in spills we are now seeing is what genuine accountability looks like in practice. We will always act where companies fail their customers and the environment. But we will also be clear, publicly, when a company does the right thing.”
Severn Trent said it remained focused on delivering further improvements for its customers and the environment. Shares in the company fell nearly 2% on Wednesday. Ofwat is still investigating United Utilities and Hafren Dyfrdwy, a Welsh provider owned by Severn Trent, as part of its sector-wide probe.