Climate change
Climate change is one of our biggest challenges. We're working on managing the impact of and reducing our contribution to it. This approach is a cornerstone of our commitment to becoming more sustainable.
Managing the impacts of climate change
The impacts of climate change are already being felt by our business. Over the past few years alone, we have experienced various extreme weather events. Some of the significant weather events since 2010 include:
2025
Driest spring in England since 1893
2024
Wettest September for Southern England since 1918
2023
Second warmest year on record for England since 1659 and eleven named storms
2022
New UK temperature record of 40.3°C was recorded at Coningsby
2021
Five named storms
2020
Wettest February since 1862
2019
Hottest temperature on record of 38.7°C in Cambridge
2018
Freezing weather 'The Beast from the East' in February/March
2016/17
The driest October to March period since 1995/96. Heatwave, torrential downpours and flash flooding in South East England
2014
Twelve major storms cause widespread damage
2013/14
Major flooding in the South East and South West of England
2010/12
Multi-year drought
It’s widely accepted that climate change is a serious issue and a major challenge to society. Our customers have told us that they want a service that is resilient to challenges. This includes current and future challenges including climate change. It's hard to predict the full extent and precise timing of its impacts. Planning for issues can make this extremely challenging.
We have considered climate-related risks, impacts, and opportunities for our services. We also considered population growth, environmental regulation, financeability and affordability to customers. You can find out more about what we're doing to tackle climate change in our reports:
We have developed a plan to reduce the impact of climate change as part of our business planning. Key issues were found to be still broadly related to either too much, too little or the wrong sort of water. This challenge is reflected in performance commitments as agreed by Ofwat.
You can find out more information in the following:
Reducing our greenhouse gas emissions (GHG)
We believe it's important to set our sights high to help keep global warming below 1.5°C. We're working to manage our carbons emissions supporting the UK's net zero goal.
For over 30 years, we’ve been on a journey to manage and reduce our carbon emissions. Our net market based emissions were 347.4ktCO2e in 2024/2025. Emission reduction activities include:
- Self-generating 249.5GWh or 19.5% of the electricity we used renewably
- Self-generating over 475.3GWh or 25.8% of the energy we used renewably
- Harnessing wind, solar, and poo power
- Managing our greenhouse gas emissions
We’ve been producing sustainable energy at Mogden sewage treatment works since 1930s. In AMP7 we delivered two biomethane Gas to Grid facilities in London. They convert biogas into biomethane to inject into the gas grid. These installations provide the equivalent of the cooking and heating requirement of over 7,000 homes.
