Sites of Special Scientific Interest Units (England)

Site Units are divisions of SSSIs. based on habitat, tenure and management, and are the basis for recording all information on SSSI Condition and management. They range in Area from 0.004ha up to 18,000ha and only overlap where SSSIs overlap. Boundaries are generally mapped against Ordnance Survey MasterMap. Attribution statement: © Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right [year].

Data and Resources

Additional Info

Field Value
Last Updated October 9, 2025, 16:08 (UTC)
Created December 20, 2016, 10:29 (UTC)