Awareness · Why it matters

A living river, and a water industry in crisis.

The tidal Thames was declared biologically dead in 1957. Today it is home to seals, seahorses and more than 115 species of fish. That recovery is real — and it is now under strain. The company that runs the sewage works on this reach drew the largest penalty ever placed on a water company, recorded the most pollution incidents of any company, and the regulator itself is being abolished. This page sets out, in plain terms, why the evidence matters — and, just as plainly, where the evidence stops.

Stylised river-wave illustration A decorative wave motif in the programme's navy and teal palette, evoking the flowing River Thames and the monitoring data gathered from it. Illustrative only — it does not plot any data. ILLUSTRATION

Awareness zone 88 sourced news items 2021–2026 Legal status stated with care

The problem, plainly

Why this reach, why now

Between Teddington Weir and Richmond, the Thames is a place people row, walk, watch birds and — as of 2026 — officially swim. It is also where a very large sewage works discharges to the river, where two water bodies have sat below “good” health for three planning cycles, and where the operator has been penalised at record scale. Here is the shape of it, in four numbers — each one measured or officially published, each one carrying the source it came from.

471.7h
that Mogden sewage works discharged storm sewage to the tidal Thames in 2024, across 50 spills — its worst year on record.
EA Event Duration Monitoring, permit CNTD.0085 RAW-PULL
523
pollution incidents from Thames Water in 2024 — the most of any company, and a bottom 1-star rating (33 were serious, up 135%).
EA Environmental Performance Report 2024 PUBLISHED
£122.7m
Ofwat penalty on Thames Water (28 May 2025) — the largest ever on a water company, including £18.2m for dividends that breached its licence.
Ofwat press release, 28 May 2025 PUBLISHED
12 → 0
European eel (Critically Endangered) caught in the Richmond tidal survey: 12 in 1993, then none after 2019 — a wildlife warning light.
EA tidal fish survey, Richmond seine series RAW-PULL

Those four numbers point the same way: documented environmental pressure on this reach, and a documented record of corporate and regulatory failure around it. But a fair reading needs the other half of the picture too. The tidal river is, on the long view, recovering — dissolved oxygen has been improving since 2007 (ZSL, statistically significant), and the freshwater stretch above the weir stays well-oxygenated. Much of the tidal biology — fish, plankton, invertebrates — scores Good or High. The honest case is not “a dead river”; it is a river under pressure, run by a system that is visibly struggling to look after it. Where the data cannot prove a link, this page says so — see the limits of the evidence at the foot of the page.

Every figure on this page is drawn from the programme's evidence base. The detail, the charts and the full source list for each live on the neutral evidence pages: sewage & storm overflows, water quality, WFD status, fish & ecology, bathing water and accountability & context.

The reach itself

This awareness page will carry photographs of the river between Teddington and Richmond — the weir, the towpath, the new bathing water at Ham, the Mogden outfall downstream. Until those are added, the space is held below.

Photograph placeholder A bordered placeholder box reserved for a real photograph of this reach of the River Thames, to be added later. [ Your photo here ] Duncan will add real river photographs in this space.
Placeholder. A real photograph of the Teddington–Richmond reach will replace this box. Images will be same-origin only, in keeping with the site's strict content policy.

The national picture · accountability

A national reckoning over water — stated with legal care

This reach does not sit in isolation. Over five years, the water industry has moved from record criminal fines and a record regulatory penalty, through a new law that can jail executives, to the abolition of the economic regulator itself. The account below keeps two lines firmly apart: a regulatory penalty (imposed by Ofwat) and a criminal conviction (a fine handed down by a court) are both proven; a charge or an investigation is an allegation, unproven until a court decides.

The biggest water penalties & fines, 2021–2026

Proven outcomes only: one record Ofwat regulatory penalty, and selected criminal court fines following guilty pleas. Two dwarf the rest.

The biggest UK water penalties and fines, 2021 to 2026, proven outcomes only Horizontal bar chart in pounds million. Ofwat's regulatory penalty on Thames Water in 2025 was 122.7 million pounds, the largest ever. Southern Water's 2021 criminal fine was 90 million pounds. The remaining criminal court fines are far smaller: Thames Water 4 million (Oxford, 2021), Thames Water 3.3 million (Gatwick, 2023), Anglian Water 2.65 million (Jaywick, 2023), Thames Water 2.3 million (Henley, 2021), South West Water 2.15 million (2023) and Severn Trent 2.07 million (2024). The two record penalties dwarf the individual criminal fines. 0 20 40 60 80 100 120 Penalty / fine — £ million (proven outcomes only) Thames Water: £122.7m regulatory penalty (Ofwat), 2025 £122.7m Thames Water Ofwat penalty · 2025 Southern Water: £90m criminal court fine £90m Southern Water criminal fine · 2021 Thames Water: £4m criminal court fine £4m Thames Water criminal fine · 2021 (Oxford) Thames Water: £3.3m criminal court fine £3.3m Thames Water criminal fine · 2023 (Gatwick) Anglian Water: £2.65m criminal court fine £2.65m Anglian Water criminal fine · 2023 (Jaywick) Thames Water: £2.3m criminal court fine £2.3m Thames Water criminal fine · 2021 (Henley) South West Water: £2.15m criminal court fine £2.15m South West Water criminal fine · 2023 Severn Trent: £2.07m criminal court fine £2.07m Severn Trent criminal fine · 2024 Regulatory penalty (Ofwat) Criminal court fine (conviction)
Sources: Ofwat press release, 28 May 2025 (£122.7m; corroborated by Water Magazine); criminal fines from Environment Agency prosecutions reported by BBC News, ITV News and gov.uk, as catalogued in the programme news feed below. Regulatory penalty (navy) and criminal fine (blue) are different legal instruments — both proven. Selected cases, not an exhaustive list; smaller criminal fines appear as short bars against the two record penalties. Provenance: PUBLISHED.

What is proven

  • Ofwat's record £122.7m penalty on Thames Water (28 May 2025) — the largest ever on a water company: £104.5m for wastewater-operations failures and £18.2m for paying dividends that breached its licence. A regulatory penalty, imposed. PUBLISHED
  • Southern Water fined a then-record £90m (July 2021) after pleading guilty to 6,971 illegal discharges from 17 sites (2010–2015); the judge found the offending deliberate. A criminal conviction. PUBLISHED
  • Thames Water criminal fines include £4m (Oxford, Nov 2021), £3.3m (Gatwick catchment, Jul 2023) and £2.3m (Henley, Feb 2021) — each after a guilty plea. Convictions, proven. PUBLISHED
  • Thames Water's 2024 record: 523 pollution incidents (most of any company), 33 of them serious (up 135%), and a bottom 1-star EA rating — the only company at 1-star. Published counts. PUBLISHED
  • The Water (Special Measures) Act 2025 received Royal Assent (Feb 2025) and came into force; it allows executives to face up to two years in prison for obstructing investigations or concealing illegal discharges, and lets Ofwat block bonuses. PUBLISHED

What is alleged, proposed or still unfolding

  • Charged, not convicted. In July 2026 the Environment Agency charged a former Southern Water chief executive and three ex-colleagues with conspiracy to defraud, alleging manipulation of self-monitoring between 2012 and 2017. These are charges only; all defendants are presumed innocent unless and until convicted. PUBLISHED (report of a charge)
  • A guilty plea, awaiting sentence. South West Water pleaded guilty (Mar 2026) to 18 charges covering 2015–2021; sentencing was listed for 30 July 2026. Guilt admitted; the sentence is a court matter. PUBLISHED
  • Ongoing investigations. A major EA/Ofwat investigation into 2,000+ sewage treatment works (opened 2021) was later widened to every English water and sewerage company. Investigations are not findings of guilt. PUBLISHED
  • The regulator itself. Following the Cunliffe review, the Government confirmed (Jul 2025) that Ofwat will be abolished and replaced by a single stronger regulator; the NAO and the Public Accounts Committee had found regulators “failed to deliver a trusted and resilient water sector.” PUBLISHED

Wording matters here. “Charged” and “alleged” are never presented as “convicted.” Regulatory penalties (Ofwat) are distinct from criminal convictions (the courts). Where a fine was later reduced on appeal — as with Welsh Water's £1.35m (2025) — that is noted in the feed. Bonus and dividend decisions are lawful corporate choices reported in the public record; only the two dividends Ofwat named were found to breach a licence.

Awareness · five-year news sweep

In the news, 2021–2026

A catalogue of 88 sourced items — national water-industry news, Thames Water's finances and penalties, and the local Teddington–Richmond story (the abstraction saga, the new bathing water, wildlife sightings and the Mogden spills). Newest first, grouped by year. Each card links out to its original source; the coloured status chips flag exactly where a story sits in law.

Status chips: Convicted and Regulatory penalty / Settlement are proven outcomes; Charged / alleged, Investigation and Proposed are not proven — allegations or provisional steps. Cards with no chip are context, finance or local news carrying no legal finding.

2026 · 13 items

2025 · 25 items

2024 · 21 items

2023 · 17 items

  • Governance

    Thames Water appoints Chris Weston as £850,000 a year CEO

    Thames Water appointed former Aggreko chief Chris Weston as chief executive from January 2024 on an £850,000 base salary plus a 12% pension allowance and potential bonuses, as the utility carried a debt burden then around…

    14 Dec 2023 · Yahoo Finance (PA)Read →

  • Sewage spill

    Raw sewage 'cover-up' at Windermere World Heritage Site

    Investigation A BBC Panorama investigation alleged raw sewage was discharged into Windermere in 2022 and that pollution incidents were downgraded and under-reported; United Utilities initially denied sewage reached the lake but later… An investigation, not a finding of guilt.

    Nov 2023 · BBC News (Panorama)Read →

  • Sewage spill

    Thames Water: 72 billion litres of sewage pumped into river in two years

    BBC analysis of FOI data found at least 72 billion litres of sewage discharged into the Thames since 2020, with Mogden near Twickenham the worst-affected site at 17.1 billion litres.

    Nov 2023 · BBC NewsRead →

  • Teddington abstraction

    Local campaigners to protest the Thames Water 'Sewage for Water' scheme

    Campaign group Save Ham Lands & River (later SOLAR) organised a protest at Ham Lands on 9 September 2023 against Thames Water's plan to abstract fresh water above Teddington Weir and replace it with treated wastewater…

    8 Sep 2023 · Teddington Nub NewsRead →

  • Teddington abstraction

    Thames Water to pump treated wastewater into river

    Thames Water said it would press ahead with its Teddington Direct River Abstraction scheme despite more than 24,000 public objections, planning to supply up to 75 million litres a day during droughts using treated effluent…

    Sep 2023 · BBC NewsRead →

  • Sewage spill

    Water firms illegally spilled sewage on dry days - data suggests

    Investigation A BBC data investigation found Thames, Wessex and Southern Water appeared to have discharged sewage illegally during dry weather in 2022 (around 3,500 hours across 388 incidents), potentially breaching their permits; the… An investigation, not a finding of guilt.

    Aug 2023 · BBC NewsRead →

  • Finance

    Thames Water secures $962 million from investors but says it will need more

    Thames Water's shareholders committed £750m ($962m) of new equity to avert collapse, described by the chairman as the largest equity support package ever seen in the UK water sector, though the company warned billions more…

    10 Jul 2023 · CNNRead →

  • Regulation

    Ofwat complacent over Thames Water affair - MP

    The Commons Environment, Food and Rural Affairs Committee chair Sir Robert Goodwill accused Ofwat of being 'very complacent' and asleep at the wheel over Thames Water's roughly £14bn debt-laden financial structure, ahead of…

    Jul 2023 · BBCRead →

  • Prosecution

    Thames Water fined £3.3m over river sewage

    Convicted Thames Water was fined £3.3m at Lewes Crown Court after pleading guilty to four charges over a 2017 discharge of untreated sewage into the Gatwick Stream and River Mole that killed more than 1,400 fish; the judge found a…

    Jul 2023 · BBC NewsRead →

  • Finance

    Thames Water: nationalisation is not the way forward says new chairman

    Thames Water's new chairman Sir Adrian Montague said nationalisation was not the answer and that private ownership remained the way forward, as the company grappled with about £14bn of debt and poor environmental performance.

    Jul 2023 · BBCRead →

  • Governance

    Thames Water boss quits after sewage spills

    Chief executive Sarah Bentley resigned with immediate effect after two years, having already forgone her bonus over the company's environmental performance.

    27 Jun 2023 · BBCRead →

  • Prosecution

    Anglian Water fined £2.65m after Jaywick sewage discharge

    Convicted Anglian Water was fined £2.65m after admitting two offences over the unauthorised discharge of around 7.5 million litres of untreated sewage into the North Sea at Jaywick in 2018; the judge noted a pattern of the company…

    May 2023 · BBC NewsRead →

  • Executive pay

    Thames, Yorkshire and South West Water bosses refuse bonuses over sewage spills

    The chief executives of Thames (Sarah Bentley, £496k), South West (Susan Davy, £522k) and Yorkshire (Nicola Shaw, up to £800k) declined their bonuses amid public and regulatory backlash over sewage pollution.

    May 2023 · BBC NewsRead →

  • Prosecution

    South West Water fined more than £2.1m over sewage pollution

    Convicted South West Water was fined £2.15m plus costs after pleading guilty to 13 counts (six illegal discharges and seven permit breaches) at sites across Devon and Cornwall between 2016 and 2020, one of which killed thousands of…

    Apr 2023 · BBC NewsRead →

  • Wildlife

    Signs erected in south west London to combat rise in seal disturbance incidents

    Thames Seal Watch installed information signs along the Thames at Richmond, Teddington, Barnes and Chiswick to reduce disturbance of seals by people getting too close.

    13 Mar 2023 · South West LondonerRead →

  • Sewage spill

    Sewage alert – Thames Water accused over repeated spills from Mogden

    Sewage and stormwater were discharged into the Thames for around 20 hours from Mogden works near Isleworth, the latest in a series of pollution incidents raising concern among campaigners and river users.

    19 Jan 2023 · Twickenham Nub NewsRead →

  • Teddington abstraction

    Thames Water proposes replacing abstracted river water with treated effluent in new resource plan

    Thames Water set out its Water Resources Management Plan proposal for a new abstraction point at Teddington, replacing extracted Thames water with highly treated recycled wastewater from Mogden sewage works to boost drought…

    13 Jan 2023 · ENDS ReportRead →

2022 · 4 items

2021 · 8 items

  • Prosecution

    Severn Trent Water fined £1.5m for sewage discharge

    Convicted Severn Trent was fined £1.5m after admitting permit breaches and illegal sewage discharges into Worcestershire watercourses in 2018, including a 360,000-litre discharge into Broadway Brook.

    9 Dec 2021 · BBC NewsRead →

  • Investigation

    Water companies could face legal action after investigation launched into sewage treatment works

    Investigation The Environment Agency and Ofwat launched a major joint investigation into more than 2,000 sewage treatment works after water companies admitted they might be making unpermitted discharges. An investigation, not a finding of guilt.

    18 Nov 2021 · GOV.UK (Environment Agency / Ofwat)Read →

  • Wildlife

    River Thames: Sharks and seahorses found living in waterway

    ZSL's first State of the Thames report found sharks, seahorses, eels and seals living in the river - now home to over 115 fish species and 92 bird species - a recovery since it was declared biologically dead in 1957.

    Nov 2021 · BBC NewsRead →

  • Prosecution

    Thames Water fined £4m after Oxford sewage leak

    Convicted Thames Water pleaded guilty and was fined £4m at Aylesbury Crown Court after roughly 500,000 litres of raw sewage leaked into Hinksey Stream, Oxford, over 30 hours in 2016, killing an estimated 3,000 fish; the emergency…

    Nov 2021 · BBCRead →

  • Prosecution

    Southern Water fined record £90m for dumping raw sewage

    Convicted At Canterbury Crown Court, Southern Water was fined a then-record £90m after pleading guilty to 6,971 illegal untreated-sewage discharges from 17 sites in Hampshire, Kent and West Sussex between 2010 and 2015; the judge…

    9 Jul 2021 · BBC NewsRead →

  • Wildlife

    River Thames: Whale spotted in Teddington after escape

    A baby minke whale first seen near Barnes escaped rescuers and reappeared stranded in the Teddington area of the Thames, prompting renewed RNLI rescue efforts.

    May 2021 · BBC NewsRead →

  • Sewage spill

    River Thames: More than 2bn litres of raw sewage discharged over two days

    Thames Water's Mogden works discharged over 2 billion litres of untreated sewage into the Thames on 3-4 October 2020, part of 3.5 billion litres released from the site across 2020.

    31 Mar 2021 · BBC NewsRead →

  • Prosecution

    Thames Water fined £2.3m for Henley fish-death pollution

    Convicted Thames Water pleaded guilty and was fined £2.3m in an Environment Agency prosecution over a 2016 discharge of sewage with ammonia at up to double the permitted levels into Fawley Court Ditch near Henley, which killed more…

    13 Jan 2021 · BBCRead →

Source: programme news catalogue (/tmp/thames_news/news_catalogue.json) — 88 items retained from 118 after de-duplication, ranked by source authority (official/primary > wire/BBC > national broadcast/financial > trade press > hyperlocal). One-line summaries are condensed from the catalogue; follow each link for the full report. The feed is refreshed as the programme monitors new coverage. PUBLISHED

The limits of the evidence — read this before you share a number

What the data does not prove (stated up front)

  • No spill volume is published — anywhere. Monitoring records how long and how often a storm overflow discharges, never how much. There is no open measure of how much sewage enters the tidal Thames here.
  • The worst water-quality readings are historical. The lowest recorded dissolved-oxygen levels are from 2004–2006; recent tidal oxygen has improved. Do not read a present-day crisis from a twenty-year-old minimum.
  • Spill hours are volatile, not a clean upward trend. They track rainfall. Mogden's discharge fell from 471.7 hours in 2024 to 202.5 hours in 2025 — most likely a drier year, not proven investment. Avoid “worse every year.”
  • The chemical “Fail” is largely a national artefact. The river's failing chemical status is driven mainly by ubiquitous persistent chemicals (PBDEs, PFOS, mercury) that fail in almost all English waters — not solely by Thames Water.
  • The tidal biology is largely healthy. Fish, plankton and invertebrates score Good or High; the “Moderate” classification is about chemistry and physical modification, not dead biology.
  • Wildlife record counts reflect effort, not population. More sightings usually means more recording. Biodiversity records are context, not proof that any decline was caused by the water company.
  • Correlation is not causation. The link between spills and oxygen sags is inferred from seasonal timing, not yet demonstrated by overlaying spill dates on continuous oxygen data. It is an open question, flagged as such.
  • Zinc is unmonitored. Zinc is a named driver of the tidal body's status, yet it has zero records at any of the local water-quality points — so that classification cannot be checked from open data.
  • Company-wide figures describe the operator, not this reach. The 523 incidents and the 1-star rating cover Thames Water's whole region; they speak to the operator's record, not specifically to the water between Teddington and Richmond.
  • A fine is not a river measurement. Penalties record legal or regulatory failure; they do not quantify how much pollution reached the river.