Milton Keynes City Council is a Lead Local Flood Authority (under the Flood and Water Management Act 2010) with a responsibility for managing the following types of flooding:

• surface water Flooding – this includes flooding from rainfall runoff from surfaces such as roads, roofs and patios. For more information refer to the Surface Water Flood Risk Maps.
• ordinary watercourses – this includes flooding from drains and ditches, but excludes main rivers that are managed by the Environment Agency. Catchment maps of the main rivers and waterbodies in Milton Keynes can be found on the Environment Agency website.
• groundwater flooding – this includes flooding caused by heavy and sustained levels of rainfall capable of increasing the groundwater table. 

Our main responsibilities as a LLFA include:

• investigating and reporting on significant flood events in the borough
• establishing and maintaining a register for all significant flood risk assets in the county
• producing a Local Flood Risk Management Strategy to manage surface water, ordinary watercourses and groundwater flooding in partnership with other risk management authorities in the county
• ensuring that new developments are designed and built in a sustainable manner which does not increase flood risk and which reduces flood risk whenever possible
• consenting new work which affects the flow of ordinary watercourses
• the power to request information relating to flooding from any organisation or individual
• the power to designate significant flood risk assets or features, formally recording the feature as a land charge so that it cannot be removed without permission from Milton Keynes Council and can therefore continue to protect people and property from flooding
• the power to enforce remedial works on unapproved construction work within ordinary watercourses or those not undertaking their landowner (riparian) responsibilities