Thames Water is Gaslighting the Public – Here’s the Truth

By Henry Shepherd, Community Campaigns Coordinator, River Action

 

Twisting and turning more than the Thames itself

As the boat race weekend approaches, Thames Water has gone on the offensive – not to clean up the Thames, but to spin the facts and put the public at risk.

Yesterday, we revealed that our 40+ water tests along the Boat Race course over the past month show the Thames would be classified as ‘poor water quality’ according to the Environment Agency regulations, with 29.5% of our samples exceeding safe limits for entering the water. This is despite it being the driest March in over 100 years….if they can’t keep the river clean in these conditions, how can they be trusted?

In a response statement, Thames Water attempted to cite ‘excellent’ water quality results, referencing data from a boat club in Hammersmith.

But here’s what they didn’t tell you.

That testing wasn’t done with Thames Water. The testing was carried out by our friends at Fulham Reach Boat Club and was actually funded by River Action. Thames Water conveniently cherry-picked a subset of this data, and, unbeknownst to them, we funded it!

Additionally, the data they selected came from a single weekly test at only one point along the course (4 tests in total). In contrast, our data, revealed yesterday, consisted of over 40 tests across the entire length of the Boat Race course from 10th March.

In short: Thames Water carefully curated the one stat that suited their PR and presented distorted information, putting public health at risk.

Thames Water simply cannot be trusted to tell the truth about basic water quality risks, and have once again willingly put river users’ health at risk, prioritising misleading headlines rather than fixing pipes.

The 2025 boat race course with River Action test sites

The Kew cover-up 

It gets worse.

On Tuesday, we were alerted to the possibility of a burst sewage pipe near Kew Bridge, with sewage reportedly spilling directly into the river just upstream of the Boat Race finish line.

We immediately called Thames Water’s pollution hotline to enquire about the issue, but were assured there were no problems to report. However, after investigating the site ourselves, we found Thames Water vans and huge sewage tankers stationed on the riverbank at Kew Bridge. After speaking with the crew, they confirmed the incident. At that time, it appeared that sewage was simply entering the river, just a mile upstream of the Boat Race finish line.

Thames Water’s initial denial of the problem highlights their true priorities: managing headlines, not public health. How much sewage has been allowed to flow into the river without the public being informed?

This issue is compounded by a separate sewage pipe even closer to the Boat Race finish line, downstream at Kew Transfer. The monitoring system for that pipe had been offline since January 19th, mysteriously coming back online the day we published our testing results (how convenient?) This means that no one knows how much sewage has been flowing into the river unchecked from that sewage overflow.

When people, including hundreds of junior rowers, and professional boat race crews, rely on this critical information to stay safe, it’s not just unacceptable – it’s dangerous.

Thames Water vans and sewage tankers near Kew Bridge on Tuesday

A failure of infrastructure, regulation, and honesty

With almost no rain recently, this pollution isn’t just a result of outdated infrastructure and unmonitored storm overflows. It reveals a much deeper issue: that even after treatment, final discharged waste water from sewage works is still far from safe. Treated effluent has no legal limit on E. Coli levels, so it frequently contains high levels of dangerous contaminants, including fecal matter and bacteria. The treatment process used by Thames Water, though permitted, falls far short of the standards needed to protect public health and the environment.

The real issue lies in the regulatory framework – unless a waterway has “bathing water status,” is home to a fish farm, or serves as a place of abstraction, there are no legal obligations to ensure that treated sewage is free from harmful substances. That’s why we’re campaigning for sewage treatment plants to be upgraded, better water quality monitoring, and enforceable limits on water quality – something that bathing water status would require.

But even with this, the Tideway Tunnel – which Thames Water touts as the solution – won’t protect us. The Tunnel is designed to manage storm overflows, not the continuous discharge of untreated or poorly treated sewage. It’s a temporary fix for a much deeper, systemic problem, and only reduces downstream pollution, which for half of the Boat Race course is irrelevant. The other half of the course – upstream of Hammersmith – is exposed to all the sewage pollution flowing along the Thames accumulated from the upstream catchment.

It is no surprise that all our tests taken upstream of the Tideway Tunnel show high levels of E.coli. This is the end of the Boat Race course and why we implore the Oxford and Cambridge teams not to throw their cox in the water. It is not safe.

Time for accountability

This isn’t just about rowing. This is about whether people can trust water companies to keep them safe. Thames Water has failed across the board:

  • They haven’t invested in modern monitoring systems.
  • They’ve lobbied for billions in bailouts while paying bonuses to executives.
  • They’ve allowed infrastructure to rot – and lied about it when questioned.

We believe Thames Water has forfeited its social licence to operate. It’s time to put the company into Special Administration, restructure it in the public interest, and end the cycle of pollution-for-profit.

River Action will continue exposing Thames Water’s spin  – not just this week, but every time they attempt to dodge accountability. This is your river, not theirs.