UK Construction and Law
United Utilities pays 964,225 pounds after a collapsed effluent pipe put raw sewage on the Fylde coast for more than 35 hours
By Staff Writer | 9 September 2026
Preston Magistrates' Court sentenced the water company on 8 September for five permit offences from June 2023, when the partial collapse of the final effluent pipe at Fleetwood wastewater treatment works backed sewage up through the network and out of three coastal pumping stations. The company put the cost of response and repair at around 38 million pounds and built a two kilometre temporary bypass.
The Environment Agency announced the sentence on Monday evening, describing the fine as a record. United Utilities Water Limited was fined 900,000 pounds, ordered to pay 62,225 pounds in prosecution costs and a victim surcharge of 2,000 pounds, a total of 964,225 pounds. The company had pleaded guilty on 22 April 2026 to five offences under regulation 38(2) of the Environmental Permitting (England and Wales) Regulations 2016, having admitted the breaches when interviewed under caution on 26 November 2024.
An asset failure, then a permit failure
The agency's investigation found the incident began with the partial collapse of the final effluent pipe at Fleetwood wastewater treatment works, which cut the volume of sewage the works could receive and caused sewage to back up through the wider system. After rainfall, sewage was discharged from the pumping stations at Manchester Square, Anchorsholme and Chatsworth Avenue into the Irish Sea between 11 and 22 June 2023, for more than 35 hours in total over several days.
The permits allow those stations to discharge only once flows reaching the Fleetwood works have reached 2,300 litres a second, and at certain times of year. The agency's analysis of the company's own flow and spill data found the threshold had not been reached when the spills occurred. The company's investigation concluded that excessive external loading caused the pipe to collapse, and said there had been no warning of the failure from physical inspection or telemetry.
This was an unacceptable pollution incident which had far-reaching consequences for residents and businesses along the Fylde Coast. Our investigation found that United Utilities Water Limited discharged sewage outside the conditions of its environmental permits. The company admitted those breaches, and today's fine reflects the seriousness of the offences and the harm caused.
Andy Brown, Water Regulation Manager, Environment Agency, 8 September 2026
The harm the court was told about
Sewage was reported on beaches and at marine recreational facilities including Fleetwood baths. The company's own modelling showed the plume touched seven bathing waters, and the agency issued no bathing advice across all eight designated bathing waters on the affected coast. A trained citizen scientist's sampling during the incident was indicative of E. coli. The Food Standards Agency temporarily closed three shellfish beds. The agency classified the incident as Category 1 under its common incident classification scheme, which the company accepted, and for sentencing submitted reckless culpability and Harm Category 1 under the environmental offences guideline. The company is a very large organisation for sentencing purposes, with turnover of about 2.6 billion pounds.
The release records the consequences for the resorts: summer visitor numbers in Blackpool fell by hundreds of thousands against the previous year, and the company made a voluntary payment of 250,000 pounds to Blackpool Council after images of the tower appeared beside coverage of the incident during a paid tourism campaign.
The engineering response
After the collapse the company built a two kilometre temporary bypass around the damaged pipe, installed additional pumping equipment and used tankers to move wastewater to other treatment works. The pipe was later repaired and the Fleetwood site returned to full service. The company put the cost of responding to and repairing the original incident at around 38 million pounds and says it has since done further work on the resilience of the wastewater network along the Fylde coast.
For anyone who designs, inspects or insures buried pressure pipework the sequence is the lesson: a final effluent main that gave no sign of distress on inspection or telemetry, a collapse attributed to external loading, and a permit that did not bend to accommodate the consequences. The fine is for the discharges; the 38 million pounds is what the pipe cost.