Association of Drainage Authorities: Administrative Boundaries - Internal Drainage Districts in England

PLEASE NOTE: This data has been published by the Environment Agency on behalf of the Association of Drainage Authorities. © Association of Drainage Authorities copyright and/or database right 2020. All rights reserved.

Under the Land Drainage Act 1991, internal drainage districts are areas defined as deriving benefit or avoiding danger as a result of drainage operations. Each internal drainage board (IDB) is a local independent public body that manages water levels in the corresponding internal drainage district. IDBs undertake works to reducing flood risk to people and property, and manage water levels for agricultural needs and for the protection and enhancement of the environment within their district. IDBs are defined as a type of Risk Management Authority under the Flood & Water Management Act 2010. Whilst indicative, the data is the most comprehensive and consistent national dataset of internal drainage district boundaries in England.

This is licensed under the Open Government Licence 3.0.

For further information please contact Association of Drainage Authorities: admin@ada.org.uk Association of Drainage Authorities website: www.ada.org.uk Attribution statement: © Association of Drainage Authorities copyright and/or database right 2020. All rights reserved.

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Last Updated July 25, 2025, 13:35 (UTC)
Created October 1, 2020, 15:06 (UTC)