Water and wastewater

We are focused on providing water and wastewater services in the most efficient and sustainable way possible. Innovation, new technologies, and the pioneering of a holistic approach to water and wastewater management are playing a key role in delivering service improvements and long-term value.

PENNON GROUP
Our business is operated through three principal subsidiaries. South West Water Limited includes the integrated water companies of South West Water and Bournemouth Water, providing water and wastewater services in Devon, Cornwall and parts of Dorset and Somerset and water only services in parts of Dorset, Hampshire, and Wiltshire. Bristol Water Group comprises Bristol Water plc, a regulated water only company serving a population of approximately 1.2 million customers in the Bristol region, and a 30% share in Water 2 Business Limited, a joint venture with Wessex Water. Pennon Group is also the majority shareholder of Pennon Water Services Limited, a company providing water retail services to non-household customer accounts across Great Britain.

OVERVIEW
• c.3.5 million total population served
• 34 raw water reservoirs
• 25,274 km drinking water mains network
• 650 wastewater treatment works with 65 ultraviolet (UV) treatment facilities*
• 50 drinking water treatment works
• 17,515 km wastewater mains network*
• 151 bathing waters and 24 shellfish waters.*
* South West Water region only

SOUTH WEST WATER

We provide water and wastewater services to a population of c.1.8 million in Cornwall, Devon, parts of Dorset and Somerset and the Isles of Scilly. South West Water is the only company to have been awarded fast-track status during two consecutive price reviews.
www.southwestwater.co.uk 

BRISTOL WATER
Bristol Water was acquired by the Group in June 2021, with merger clearance from the CMA received on 7 March 2022. The merger of South West Water and Bristol Water completed on 1 February 2023 with the combined water business now operating under one licence. The merger and statutory transfer mark a further step on our integration blueprint, focused on bringing together the best of the best to realise operational and service improvements across the Group. Bristol Water provides water services to a population of c.1.2 million across Bristol City, North Somerset and areas of Bath, North East Somerset and South Gloucestershire.
www.bristolwater.co.uk

BOURNEMOUTH WATER
Providing water services to a population of c.0.5 million in areas of Dorset, Hampshire and Wiltshire. Bournemouth Water was acquired by the Group April 2015 and has been integrated with South West Water, delivering synergies and service improvements.

www.bournemouthwater.co.uk 

SES WATER
SES Water was acquired by Pennon Group in January 2024. They supply 160 million litres of clean water every day to over 750,000 people in parts of Surrey, Kent and south London. Their 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. Link to the SES website here.

www.seswater.co.uk