Updated Groundwater Vulnerability Maps

In September 2017 the Environment Agency updated its groundwater vulnerability maps to reflect improvements in data mapping, modelling capability and understanding of the factors affecting vulnerability.

New Maps

The new maps indicate vulnerability of groundwater to a pollutant discharged at ground level based on the hydrological, geological, hydrogeological and soil properties within a single square kilometre.
Two map products are available:
• The combined groundwater vulnerability map designed to display groundwater vulnerability (High, Medium, Low), the type of aquifer (bedrock and/or superficial) and aquifer designation status (Principal, Secondary, Unproductive) separately; and
• The simplified groundwater vulnerability map developed for non-groundwater specialists who need to know the overall risk to groundwater but do not have extensive hydrogeological knowledge.

Identification of where solution features may exist

Importantly the two maps identify areas where solution features may be present. Solution features can enable rapid movement of a pollutant if present and these are identified as stippled areas on the maps. Once released the updated maps will replace the existing groundwater vulnerability maps.

The maps can be viewed using the Environment Agency’ What’s in your backyard.
You can download the Environment Agency’s “Groundwater vulnerability maps technical summary” document by clicking on the button below:


H2Ogeo provides detailed groundwater risk assessments for Clients in the UK and overseas, for more information visit the website www.h2ogeo.co.uk or contact us.