Thames Water calls for public help to trace source of sewer oil pollution in Gerrards Cross
Ongoing pollution threatens River Misbourne and sewer infrastructure
Thames Water is appealing to the public in Gerrards Cross to help identify the source of industrial oil pollution affecting its sewers and risking the ecologically rare River Misbourne.
The oil pollution was first identified in 2024 and reported to the Environment Agency, but the source remains unknown.
Efforts to trace the origin of the pollution have been challenging, as detection only occurs further down the network.
Thames Water urges anyone with information or who has observed illegal discharging to contact their 24/7 pollution hotline or file a report online.
Businesses are reminded of their responsibility under trade effluent consent regulations to treat hazardous waste before discharging it into the sewer network.
Without adherence, blockages, flooding, and environmental damage may occur.
The River Misbourne, with its vulnerable chalk streams supporting diverse fauna and flora, is at risk from contamination.
Additionally, industrial oil can damage infrastructure, leading to potential service disruption.
Stephen Crabb, Thames Water’s Head of Waste Operations Home Counties, highlighted the importance of community collaboration to address sewer abuse and protect river health.
Thames Water continues to prioritise river health and infrastructure upgrades as part of its long-term strategy.
Efforts include enhancements in wastewater treatment capacity and nutrient reduction schemes.
Thames Water has recently held food companies accountable for negligence impacting sewers, underscoring the seriousness of sewer abuse.
It spends £40 million annually on removing sewer blockages, a cost eventually passed to customers.