South West Water Fined £7.8 Million for Years of Illegal Sewage Spills
South West Water was fined £7,867,733 at Plymouth Magistrates' Court on 29 September after pleading guilty to 18 charges relating to sewage pollution in Cornwall and Devon. The Guardian
The prosecution was led by the Environment Agency. The company admitted 17 charges for illegal water discharge activities, releases made without legal permission, and one charge for failing to take reasonable steps to fix a failure at a pumping station. District Judge Matson imposed the sentence. It is the largest fine for environmental offences in the region.
The offending took place between January 2015 and July 2021 in Bodmin, Harlyn, Playing Place, Polperro and Plymouth. The discharges affected popular bathing spots and sensitive habitats in Cornwall and Devon.
Near Bodmin, the company's sewage works produced 336 illegal spills in the seven years to March 2020. Sewage was discharged into the River Camel in Cornwall more than 336 times. The Camel is home to otters and Atlantic salmon. GOV.UK
At Harlyn on the north coast of Cornwall, there were 231 illegal sewage discharges between January 2016 and July 2021.
At Polperro harbour in Cornwall, untreated sewage gushed through the harbour wall on 24 August 2019, a bank holiday weekend. Engineers took 10 hours to attend. The court attributed a £1.1 million component of the total penalty to that single incident.
In Plymouth, the case centred on a combined sewer, a shared pipe for sewage and rainwater, entering Budshead Creek in Whitleigh. Failure of that pipe led to two pollution incidents in August and September 2020. The court heard the company had failed to provide a permanent fix for the sewer entering the creek despite multiple formal warnings from the Environment Agency over several years.
District Judge Matson found the company's conduct amounted to reckless failures in management systems and response to known risks. The GOV.UK notice of the outcome was titled "'Reckless' South West Water fined £7.8 million".
In addition to the fine, the company was ordered to pay £329,993 in costs and a £120 victim surcharge. It has 56 days to pay all penalties in full. Clarissa Newell, the Environment Agency's environment manager for Devon and Cornwall, welcomed the fine. BBC
South West Water said it is investing £760m to tackle storm overflows, outlets that release excess water in heavy rain, and has reduced spills by 17% in the last year.
The sentence follows earlier enforcement. In 2023 the company was prosecuted for 13 charges covering July 2016 to August 2020 and fined £2.15 million. It has also pleaded guilty to six further criminal charges relating to spills at Holywell Sewage Pumping Station, to be considered at a later date.
The broader context here is enforcement as a compliance signal. For operators, the judgment links asset knowledge, warning history and response time to culpability, not only spill volume. For regulators, successive prosecutions against the same company test whether financial penalties alter spending and operational control. The outstanding Holywell charges mean the company's criminal liability picture is not yet closed.
