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Leakage plummets after smart water network upgrades

  • Leakage plummets after smart water network upgrades
    Image: Thames Water

About the entity

Thames Water
Every day, we serve 15 million customers across London and the Thames Valley.

Londoners with smart meters have helped Thames Water achieve the industry’s biggest reduction in leakage this century.

Round-the clock data from nearly 450,000 smart meters across the capital has helped Britain’s largest water company find and repair a record number of leaks, hit its regulatory target and reduce overall leakage from its 20,000 mile network of pipes by 15 per cent in one year.

Thames Water now has ambitious plans to continue modernising the capital’s Victorian network by ramping-up the use of advanced digital technology and smart data to achieve a further 20 per cent region-wide reduction in leakage by 2025, and 50 per cent by 2050.

The company has also cut supply interruptions – where customers are off water for more than four hours – by half over the last two years, and recorded some of its best ever water quality scores.

Steve Spencer, Thames Water operations director, said: “We know reducing leakage and keeping the taps flowing are the most important things to our customers, and so today’s results are a huge step forward. Our smart upgrades combined with the dedication and commitment of our teams has delivered this boost in performance.

“Working with our customers, the data has given us a much greater understanding of what’s happening underground and saved millions of litres of water every day. The backlog of repairs to water pipes is down to its lowest level in a decade.

“We’re now determined to build on this momentum for another 20 per cent drop in leakage over the next five years, and then go much further as part of ambitious long-term plans to replumb London and the Thames Valley. We know there’s no room for complacency as we face even tougher targets, and that’s why we’re investing in our people and the best technology to keep upgrading our network.”

John Dickie, London First director, added: “A reduction in leakage on this scale is good for London’s environment and shows that Thames Water’s investment in digital and smart tech looks to be bearing fruit. London’s business community backs continued investment to modernise the capital’s Victorian network and protect the city against the future challenges of drought and flooding.”

Thames Water has been delivering an essential service throughout the coronavirus pandemic to customers across London and the Thames Valley. The company’s increased understanding of the underground network, ability to pinpoint hidden leaks, reduce the risk of major bursts and respond to incidents more efficiently has helped maintain performance during these unprecedented times, which has seen record demand for water following hot weather and lockdown restrictions.

Thames Water achieved its leakage reduction target for 10 consecutive years, but then missed its target for three years. In August 2018, therefore, the company agreed a package of financial and non-financial commitments with Ofwat, the industry regulator, under Section 19 of the Water Industry Act 1991. This included paying £120 million back to customers from Thames Water’s shareholders and was reflected in discounted bills. 

Smart water meters are being progressively installed across the Thames Water region due to pressures on water resources from an increasing population and climate change. It is the second biggest programme of its kind in the world, with latest figures showing that customers on a meter use up to 17% less water.

In 2019/20, meters helped detect 13,500 leaks on customer supply pipes and saved nearly 18 million litres every day, which is enough water to fill seven Olympic swimming pools. The meters provide 10 million readings every 24 hours and have so far been installed in 15 London boroughs, including Bexley, Camden, Hackney and Islington, with the remaining areas and Thames Valley due to be completed by 2025.

Thames Water has reduced leakage by 15 per cent from 2018/19 to 595 million litres per day, which is 11 Ml/d below this year’s target of 606 Ml/d. On average, 1,400 leaks have been repaired every week over the last year. 

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