South West Water Hit With Record Fine Over Devon Parasite Outbreak
BBC Business reported Tuesday that South West Water has received a record £1.853m fine after its supply network in and around Brixham, Devon, became contaminated with the parasite cryptosporidium in 2024.
Exeter Magistrates’ Court handed down the penalty following a prosecution by the Drinking Water Inspectorate. The company entered an early guilty plea to supplying water unfit for human consumption. That plea reduced the fine by one third from a higher starting point.
A Major Public Health Incident
The contamination ran for 54 days beginning in May 2024. More than 140 confirmed cases of illness were recorded. Four individuals were hospitalised during the episode.
Judge Stuart Smith described the event as a major public health incident. He said disruption to daily life had been extensive and harm wide-ranging. Critically, he found the company’s air valve monitoring system had been wholly inadequate.
Smith concluded there had been a systemic failure of governance. No visual inspection scheme for air valves had existed, leaving an obvious gap in oversight. The total penalty, including surcharges and costs, reached approximately £1.93m.
How the Contamination Spread
Investigators at the Drinking Water Inspectorate found that cryptosporidium derived from animal faeces entered the supply network on nearby agricultural land. A faulty, mud-covered air valve was the likely entry point.
A boil-water notice was issued to around 17,000 homes and businesses on 15 May 2024. For some properties that advisory remained in place for the full 54-day period, lifting only in early July. Businesses told the court they lost significant revenue during what should have been a peak tourist season.
Background: Fines Rising Across the Sector
Water industry penalties in the UK have climbed sharply in recent years. Regulator Ofwat issued a £122.7m fine to Thames Water in May 2025 over sewage spill violations and improper shareholder payouts. Anglian Water was penalised £1.42m in the same month for plastic material contamination affecting 1.3m customers. Tuesday’s sentence surpasses that Anglian figure, making it the largest criminal fine levied against a water company for a drinking water offence.
Also Read: Thames Water Faces £122.7M Penalty Over Sewage and Dividend Breaches
Company Apologises, Pledges Rebuild
Keith Haslett, chief executive of Pennon Group, which owns South West Water, acknowledged lessons must be learned. He said restoring trust with customers in Brixham and beyond would require sustained effort.
Victim statements read to the court were striking. One resident lost nearly a stone in weight after going without food for eight days. A mother described her 10-year-old son spending three nights in hospital. Drinking Water Inspectorate chief inspector Marcus Rink said incidents like this, though rare, demonstrate the consequences of failing to maintain the highest operational standards.
Read Next: UK Regulators Step Up Enforcement Against Water Industry Polluters
