The dataset (Excel) details the water supply, sewerage and environmental agencies for England and Wales constituencies. The geographical area of water and wastewater companies doesn’t always align with other boundaries such as constituencies or local authorities. Water and wastewater companies provide vital services to constituents and this data aims to help MPs and their staff identify responsible companies and their contact details. In some cases, it may be necessary to contact industry regulators, local authorities or other organisations to deal with an issue.