SES Water is a water-only company, supplying drinking water to more than 735,000 customers in East Surrey, West Kent, South L ... ondon and parts of West Sussex. 85% of our water supply comes from the deep aquifers in the chalk of the North Downs or the large deposits of greensand south of the Downs. We also source 15% of our water supply from the River Eden and it’s stored in our reservoir near Sevenoaks in Kent, prior to treatment. We pride ourselves on our customer service and strive to be an outstanding water company that delivers service excellence. Our employees support our vision and values and work with us to achieve our goals. read more