Carbon Storage Stewardship Survey

The 2026 Carbon Storage Stewardship Survey (CSSS) is to be completed by the operators of all UK carbon storage licences. This survey only requests data related to processes involving the storage of carbon dioxide.

For each carbon storage exploration or storage licensee holder, the assigned SPA will be the point of contact whilst the survey is live, as well as being the person responsible for the completion and submission of the survey. 

The CSS Survey will be available to download/upload via  North Sea Transition Authority Web Client Web Client (SFTP) portal.

A supporting CSSS User Guide, to assist an operator whilst completing the CSS Survey, will be available for download from the portal as well as this landing webpage.

Note:  Throughout the user guide, any reference to ‘survey year’ should be interpreted as the ‘year’ prior to survey deadline date, i.e. 2026 for this survey year.

The NSTA aims to maintain a broadly standard survey so that data can be collated, compared, and contrasted with previous annual datasets. However, small changes may occur and will be communicated accordingly. The CSSS Summary of changes document defines the main changes that have been made to the 2026 CSS Stewardship Survey, taking into consideration feedback received from operators following the 2025 survey.

In accordance with section 112 of the Energy Act 2023, a statutory notice requiring your organisation to provide the NSTA with the information requested in the CSSS was communicated via the CSSS launch email (and is available for download from this landing page).

If you have any questions, please contact CSSS@nstauthority.co.uk 

Note: Information associated with the Stewardship of hydrocarbons can be found on the Asset Stewardship webpage.