IntroductionThe earth potential rise (EPR) dataset includes the fault current, ground return current, EPR and site classification at various voltages (132kV, 66kV, 33kV, 25kV, 20kV, 11kV, 6.6kV) for all Grid and Primary substations. This data can be used in substation earthing system design and assessment. For further information on earthing refer to UK Power Networks' earthing standard EDS 06-0001 available from our website https://g81.ukpowernetworks.co.uk/. Please send any enquiries related to the dataset to earthingenquiries@ukpowernetworks.co.uk. Methodological Approach EPR data is uploaded from UK Power Networks' data warehouse. Site Functional Locations (FLOCs) are used to associate soil data to Key characteristics of active Grid and Primary sites — UK Power Networks Quality Control Statement Quality Control Measures include: Verification steps to match features only with confirmed functional locations. Manual review and correction of data inconsistencies. Use of additional verification steps to ensure accuracy in the methodology. Assurance Statement The Open Data Team has checked to ensure data accuracy and consistency. Other Download dataset information: Metadata (JSON) Definitions of key terms related to this dataset can be found in the Open Data Portal Glossary: https://ukpowernetworks.opendatasoft.com/pages/glossary/