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About us

We supply 160 million litres of clean water every day to over 750,000 people in parts of Surrey, Kent and south London. Our supply area is 322 square miles extending from Morden and South Croydon in the north to Gatwick Airport in the south and from Cobham, Leatherhead and Dorking in the west to Edenbridge in the east. 

Groundwater supplies provide 85 per cent of our water with 15 per cent being extracted from our reservoir at Bough Beech near Edenbridge.  

We maintain over 2000 miles of water mains and have eight treatment works, 23 pumping stations and 31 operational service reservoirs and water towers. 

Depending where you live, your wastewater services are provided by either Thames Water or Southern Water.

Map showing the areas that SES Water serves

SES community team at a show

Our community

We don’t just supply drinking water to more than 750,000 customers daily. Importantly, we make a valuable contribution to our communities too.

Our community
Overhead drone image of Bough Beech treatment works buildings

Innovating for the future

Innovation enables us to better serve our customers, protect our environment, meet future challenges, and work more efficiently.

Innovating for the future
Drone footage of Bough Beech reservoir

Our history

Our water company has been operating since 1862. Find out about our history and how its shaped the business we are today.

Our history
stack of publications

Our publications

Find out about everything from our business plan for 2025-20230, to our net zero carbon routemap, drought plan and more.

Our publications
drone landscape of Beech Bough reservoir

Water resources market information

This information is to help businesses and organisations identify new opportunities in providing, managing or developing services related to new water resources, demand management or leakage.

Market information
Smiling HomeServe engineer standing by his van

Plumbing and Drainage Plus

Protect your plumbing and drainage with HomeServe for just £12* in the first year. *£1 per month in year one with £30 excess. New customers, homeowners only. T&Cs apply.

Find out about HomeServe