Pennon is one of the largest environmental infrastructure groups in the UK. At the top end of the FTSE 250, the Group has ass ... ets of around £5.7 billion and a workforce of over 4,800 people. OUR BUSINESSES: WATER AND WASTEWATER SOUTH WEST WATER Providing water and wastewater services to a population of c.1.7 million in Cornwall, Devon and parts of Dorset and Somerset. South West Water was awarded enhanced status for its 2015-2020 Business Plan, and has the highest potential returns in the water sector. BOURNEMOUTH WATER Providing water services to a population of c.0.5 million in areas of Dorset, Hampshire and Wiltshire. Bournemouth Water was acquired in April 2015 and has been substantially integrated with South West Water to deliver synergies and savings. read more