A major environmental prosecution has ended with South West Water pleading guilty to a series of pollution offences spanning six years, covering multiple sites across Devon and Cornwall.
The case, brought by the Environment Agency, centres on repeated unlawful sewage discharges into rivers, streams, beaches and coastal waters.
The utility admitted 18 charges linked to environmental breaches, with sentencing scheduled for 30 July 2026 at Plymouth Magistrates’ Court.
Court proceedings confirm widespread environmental breaches
The hearing, concluded in Plymouth, heard that most of the offences involved illegal discharges of untreated sewage into watercourses without valid environmental permit compliance.
One additional charge relates to the company’s failure to take reasonable remedial action after a sewage pumping station failure.
The offences occurred between January 2015 and July 2021 across five main locations: Bodmin, Harlyn, Playing Place, Polperro and Plymouth.
Several incidents took place during an August bank holiday period, raising further concerns about operational resilience during peak demand.
Harlyn Beach and River Camel among worst-hit sites
One of the most heavily affected areas was Harlyn, where untreated sewage was discharged onto the beach on 231 separate occasions between 2016 and 2021.
The site is widely used by both residents and tourists, making the repeated contamination particularly significant for public health and recreation.
At Bodmin’s Nanstallon sewage treatment works, regulators recorded 336 illegal spills over a seven-year period ending in 2020.
These discharges entered the River Camel, a protected conservation area known for supporting Atlantic salmon, bullhead fish and otter populations.
Extended pollution incident at Hooe Lake raises alarm
Another major breach occurred at the Hooe Lake sewage pumping station near Plymouth.
In August 2020, a single failure led to an uncontrolled discharge lasting 88 hours, continuing from 28 August until 1 September.
Hooe Lake, recognised for its ecological importance including mudflats and open waters, is also a popular area for watersports.
The prolonged spill raised concerns over both environmental damage and recreational safety.
Multiple coastal and inland locations affected
Further offences detailed in court included pollution incidents at Polperro Harbour, Halvarras near the Fal Estuary, and Budshead Creek in Plymouth.
At Polperro, sewage was discharged into the harbour during August 2019, while at Halvarras, two discharges were recorded over a short two-day period in 2018.
Budshead Creek also experienced illegal discharges in 2020, affecting inland freshwater ecosystems in the Plymouth area.
Holywell charges still pending consideration
Additional charges linked to Holywell Sewage Pumping Station in Cornwall are yet to be fully resolved and will be considered at a later stage.
These relate to multiple annual discharges between 2016 and 2021 into streams flowing toward Holywell Bay Beach.
The court heard that these matters remain part of the broader case and will be addressed separately in future proceedings.
Regulator response highlights long-term investigation
Commenting on the case, Environment Agency manager Clarissa Newell said the prosecution was the result of years of detailed investigative work by officers committed to protecting coastal and inland waters across Devon and Cornwall.
She stressed that environmental enforcement remains a priority, stating that polluters must be held accountable for damage caused to sensitive ecosystems and public spaces.
Previous penalties add to mounting regulatory pressure
The company has faced earlier enforcement action.
In 2023, South West Water was fined £2.15 million after being found guilty of 13 separate pollution offences covering incidents between 2016 and 2020.
The latest guilty pleas significantly expand the scale of the company’s environmental liabilities and set the stage for sentencing later in 2026, where penalties for the most recent 18 charges will be determined.
