1001 Smart Cities
🇬🇧 London

Thames Water Smart Metering & AI Leak Detection

🤖 AI-generated summary · ◆ 9 sourced claims · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

9 sourced claims on this page, none individually verified yet — turn on “Sources in the text” to see each one.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

The saving that defines this programme — 5.78 megalitres a day — was published by the sensor vendor's own leakage director, 20 weeks into a three-year contract, for the areas that service covers.

Outcome🔄 Ongoing
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run byThames Water
Scale🗺️ Regional

Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 15 more in London · 💧 Water guide · 🌱 Environment projects

Thames Water, the UK's largest water and wastewater company, has installed over 1.2 million smart water meters connected over Vodafone's NB-IoT network, with about a further million homes and businesses planned by 2030 under a £50 million framework signed in November 2024. Its LeakNavigator programme, running since January 2023, put 3,450 Ovarro acoustic sensors across 110 district-metered areas, and a collaboration begun the same year applies FIDO's AI, on Microsoft's Azure OpenAI service, to acoustic data for part of London. The next 450,000 meters go into London through Arqiva; beyond that the effort moves out to the Thames Valley and Home Counties, where summer use runs higher.

Live 🤖 Uses AI

📊 Impact

Twenty weeks into the LeakNavigator contract, 788 leaks had been raised and categorised and 5.78 megalitres a day were being saved in the areas that service covers — figures published by Ovarro's own global leakage solutions director in a trade magazine, not by an independent assessor, and measured across 110 district-metered areas rather than across the network. The target they serve is a 20.5% cut in leakage over London and the Thames Valley, set to meet the regulator's requirements; where the company stands against it is recorded in Ofwat's annual performance report rather than in either announcement. Average use in the region runs around 140 litres per person a day against a national goal of 110 litres by 2050.

🎓 Lesson

Almost every number that travels with this programme belongs to a supplier. The saving that defines it — 5.78 megalitres a day — comes from an article written by the sensor vendor's own leakage director, covers only the district-metered areas the service is deployed in, and was measured 20 weeks into a three-year contract; the AI half of the story is told by Microsoft about a project Microsoft funds; the metering figures come from the utility announcing its own £50 million framework. None of them says how much water the network still loses, which is the number that would tell a reader whether any of it is working. And the rollout's centre of gravity is moving: the next 450,000 meters are London's, but the effort after that is aimed at the Thames Valley and Home Counties.

🌱 EnvironmentWaterSensors & IoTArtificial intelligence

Sources

↗ Thames Water — Million-plus smart meters coming to the Thames Water region (Nov 2024)Published 28 November 2024Operator announcement of a £50 million smart-meter framework with Honeywell and Sensus: over 1.2 million devices already installed with Arqiva and Morrisons Water Services, around a further million homes and businesses by 2030, some 450,000 more meters in London through Arqiva, connection over Vodafone's NB-IoT network, and a stated shift of effort to the Thames Valley and Home Counties. Regional use is given as around 140 litres per person a day against a national target of 110 by 2050.
↗ Utility Week — Thames Water hits half-million smart meter milestoneTrade press item on the smart-meter rollout reaching half a million meters.
↗ Envirotec — LeakNavigator results, written by Ovarro's global leakage solutions directorPublished 25 October 2023Trade magazine article carrying the LeakNavigator numbers, written by Tony Gwynne, global leakage solutions director at Ovarro — the supplier of the sensors. From January 2023, 3,450 Ovarro sensors across 110 district-metered areas; 20 weeks in, 788 leaks raised and categorised and 5.78 megalitres a day saved in the areas served; the programme serves a 20.5% leakage reduction target across London and the Thames Valley.
↗ Microsoft Source — FIDO's acoustic AI, in a feature by the project's funderPublished 19 September 2024Microsoft's own publication on a collaboration it funds: FIDO's acoustic leak-detection AI, running on Azure OpenAI Service, under a 2023 contract to detect leaks in part of London for Thames Water.
↗ Ofwat — Water company performance report 2024-25The regulator's annual assessment of water company performance for 2024-25, which is where leakage performance against target is recorded.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. 3 of 5 sources carry a publication date, from 25 October 2023 to 28 November 2024.

When the sources were published

  1. Envirotec Magazine · pressEnvirotec — LeakNavigator results, written by Ovarro's global leakage solutions director
  2. Microsoft · vendorMicrosoft Source — FIDO's acoustic AI, in a feature by the project's funder
  3. Thames Water · utilityThames Water — Million-plus smart meters coming to the Thames Water region (Nov 2024)

Every source, with links ↑

What happened to this record

  1. Sources last read
  2. Entered the record

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 9 claims with their sources · the forensic record

Evidence Passport · public beta 9 addressable claims, 5 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 9

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-6d4509c650e1a3f9 quantitative
has installed over 1.2 million smart water meters connected over Vodafone's NB-IoT network, with about a further million homes and businesses planned by 2030 under a £50 million framework signed in November 2024
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The operator's November 2024 announcement of a £50 million framework states that over 1.2 million devices are already installed, that the strategy is to reach an additional million homes and businesses by the end of AMP 8 in 2030, and that both suppliers' meters connect over Vodafone's Narrowband IoT network.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Thames Water — Million-plus smart meters coming to the Thames Water region (Nov 2024)
Claim 2 clm-510f0f9569f30819 quantitative
put 3,450 Ovarro acoustic sensors across 110 district-metered areas
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The article states that from January 2023 a project has been under way to install 3,450 Ovarro sensors across 110 district metered areas within the water network.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Envirotec — LeakNavigator results, written by Ovarro's global leakage solutions director
Claim 3 clm-11f97a2aac038fc1 descriptive
a collaboration begun the same year applies FIDO's AI, on Microsoft's Azure OpenAI service, to acoustic data for part of London
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Microsoft states that its collaboration with FIDO began in 2023 with a contract to detect leaks in part of London for the Thames Water utility, and that FIDO's tool uses OpenAI's GPT-4 on Microsoft Azure OpenAI Service for acoustic leak detection.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Microsoft Source — FIDO's acoustic AI, in a feature by the project's funder
Claim 4 clm-0bd2784ec6089fae quantitative
The next 450,000 meters go into London through Arqiva; beyond that the effort moves out to the Thames Valley and Home Counties, where summer use runs higher
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The operator states that Arqiva will remain contracted to roll out around a further 450,000 smart meters in London, and that the company will focus its efforts on households and businesses in the Thames Valley and the Home Counties, where water use is often higher during summer and hotter, drier periods.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Thames Water — Million-plus smart meters coming to the Thames Water region (Nov 2024)
Claim 5 clm-6645a99dfa965193 quantitative
Twenty weeks into the LeakNavigator contract, 788 leaks had been raised and categorised and 5.78 megalitres a day were being saved in the areas that service covers
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The article states that the sensors provide a daily call-in with leak data and that just 20 weeks into the project 788 leaks had been raised and categorised, with a total of 5.78 megalitres of water per day saved in the areas served by LeakNavigator.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Envirotec — LeakNavigator results, written by Ovarro's global leakage solutions director
Claim 6 clm-5dcd7b79bb18b229 quantitative
The target they serve is a 20.5% cut in leakage over London and the Thames Valley, set to meet the regulator's requirements
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same article states that Thames Water is working to achieve a 20.5% reduction in leakage across London and the Thames Valley region to meet regulatory targets.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Envirotec — LeakNavigator results, written by Ovarro's global leakage solutions director
Claim 7 clm-1a469d0c78799ed1 quantitative
Average use in the region runs around 140 litres per person a day against a national goal of 110 litres by 2050
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The operator's announcement states that national government targets aim to reduce daily water use to 110 litres per person by 2050, with current use in the area at around 140 litres per person.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Thames Water — Million-plus smart meters coming to the Thames Water region (Nov 2024)
Claim 8 clm-5650c744b015f926 quantitative
comes from an article written by the sensor vendor's own leakage director, covers only the district-metered areas the service is deployed in, and was measured 20 weeks into a three-year contract
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The article's own by-line credits Tony Gwynne, global leakage solutions director at Ovarro — the company supplying the sensors — and it describes a three-year leakage reduction contract, with the saving stated for the areas served by LeakNavigator.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Envirotec — LeakNavigator results, written by Ovarro's global leakage solutions director
Claim 9 clm-4991b4ebcf990481 descriptive
the AI half of the story is told by Microsoft about a project Microsoft funds
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The FIDO account appears on Microsoft's own publication and describes projects Microsoft funds, with Microsoft also having helped FIDO develop the technology at its hackathons in London.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Microsoft Source — FIDO's acoustic AI, in a feature by the project's funder
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-27-claims-and-sources effective 2026-07-25 · created 2026-08-27

Awaiting operator and domain-expert review; publication of this revision implies neither.

Erratum on this revision's envelope. The snapshot, its hash and its permanent link are untouched.

  • createdAt previously read 2026-08-28T17:00:00Z. The batching script that produced this revision advanced createdAt into the future to satisfy the strictly-increasing order the validator requires per entity. The value never recorded a real event; the corrected value is the moment the revision provably existed in the repository. Corrected to 2026-08-27T02:03:11Z on 2026-08-27; evidence: first appears in commit 0bdc0f6f67, committed 2026-08-27T02:03:11Z.
sha256:a8b4f458bf8fce9c0d01a2130813e272fead7f5318c47ac5683f9b0342a281de
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
9
of 9 claims mapped
5
source dossiers
3
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Thames Water
Actor types
utility
Funding model
utility
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

5 source dossiers

Thames Water — Million-plus smart meters coming to the Thames Water region (Nov 2024) thameswater.co.uk · 3 linked claims

Open original source ↗

Stable source ID
src-94bd6cef5c22b7c3
Publisher
Name not classified · thameswater.co.uk
Type / language
web-page · language not classified
Published
2024-11-28
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-25
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Operator announcement of a £50 million smart-meter framework with Honeywell and Sensus: over 1.2 million devices already installed with Arqiva and Morrisons Water Services, around a further million homes and businesses by 2030, some 450,000 more meters in London through Arqiva, connection over Vodafone's NB-IoT network, and a stated shift of effort to the Thames Valley and Home Counties. Regional use is given as around 140 litres per person a day against a national target of 110 by 2050.

Descriptive only — not page/paragraph exact
Claims linked
Utility Week — Thames Water hits half-million smart meter milestone utilityweek.co.uk · background

Open original source ↗

Stable source ID
src-8c19fba4c05b5572
Publisher
Name not classified · utilityweek.co.uk
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-25
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Trade press item on the smart-meter rollout reaching half a million meters.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Envirotec — LeakNavigator results, written by Ovarro's global leakage solutions director envirotecmagazine.com · 4 linked claims

Open original source ↗

Stable source ID
src-26b10fd4112610a4
Publisher
Name not classified · envirotecmagazine.com
Type / language
web-page · language not classified
Published
2023-10-25
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-25
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Trade magazine article carrying the LeakNavigator numbers, written by Tony Gwynne, global leakage solutions director at Ovarro — the supplier of the sensors. From January 2023, 3,450 Ovarro sensors across 110 district-metered areas; 20 weeks in, 788 leaks raised and categorised and 5.78 megalitres a day saved in the areas served; the programme serves a 20.5% leakage reduction target across London and the Thames Valley.

Descriptive only — not page/paragraph exact
Claims linked
Microsoft Source — FIDO's acoustic AI, in a feature by the project's funder news.microsoft.com · 2 linked claims

Open original source ↗

Stable source ID
src-8480f2f9d1c51089
Publisher
Name not classified · news.microsoft.com
Type / language
web-page · language not classified
Published
2024-09-19
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-25
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Microsoft's own publication on a collaboration it funds: FIDO's acoustic leak-detection AI, running on Azure OpenAI Service, under a 2023 contract to detect leaks in part of London for Thames Water.

Descriptive only — not page/paragraph exact
Claims linked
Ofwat — Water company performance report 2024-25 ofwat.gov.uk · background

Open original source ↗

Stable source ID
src-5f0e9d3f6ea2befd
Publisher
Name not classified · ofwat.gov.uk
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-25
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The regulator's annual assessment of water company performance for 2024-25, which is where leakage performance against target is recorded.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇪🇸 Smart Water Network: Metering and AI Failure Prediction · Barcelona Two AI water networks: Barcelona's REPIPE predicts pipe failures; Thames Water's FIDO listens for leaks across 3,450 acoustic sensors. 🇰🇷 Seoul's Digital Water Meter Rollout · Seoul Smart water metering at scale: Thames Water passed 1.2M meters across London; Seoul is converting its meters citywide by 2040. 🇵🇪 SEDAPAL Smart Water Meters — Remote Shutoff Pilot · Lima Smart water meters at very different scale: Thames Water runs 1.2M+ in London; Lima's SEDAPAL pilot covers ~43 with remote shutoff.

Explore the wider context

📟 A Reading Is Not a Decision📖 Adaptive traffic signals📖 District metering area (DMA)📖 Non-revenue water (NRW)
📎 Cite this project

1001 Smart Cities (2026). “Thames Water Smart Metering & AI Leak Detection” — London, United Kingdom. The Smart City Atlas. https://1001smartcities.org/projects/london-thames-water-smart-metering/ (last verified 2026-07-25). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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