environmental news & information about the UK electricity supply industry
This archive goes back to 12 September 2017, which is when National Grid started forecasting and reporting carbon intensity. You can also see their current forecast. For carbon intensity data back to January 2015, calculated from Fuel Mix data, see the Fuel Mix Archive.
We are working to resolve some issues with this archive related to British Summer Time.
Calculation by National Grid of the carbon intensity of GB electricity supply for the selected period (includes embedded generation and interconnector imports).
LOW: 89 ; AVERAGE: 131 ; HIGH: 184 CO2 g/kWh*
The carbon intensity data for this graph is National Grid half-hourly data for GB electricity, including embedded solar and wind generation, and interconnector imported electricity.
National Grid carbon intensity factors for each fuel source are slightly different from those used by electricity info elsewhere on the site.
The red and green zones in the Carbon Intensity chart represent the upper and lower quartiles for the half-hourly intensity data over the selected period.
If you intend using carbon intensity data to decide when to run white goods like washing machines and tumble dryers, please take note of Fire Service advice not to run such equipment at night or while unattended.
This site relies on individual donations to help cover the costs of maintenance and development.
If you find the resources provided useful, please consider making a contribution to support the site.
This site’s Daily News content is provided by Edinburgh Energy & Environment Consultancy. EEE are experts in policy and analysis on energy and environment issues, particularly nuclear power.
Services include: supplying tailored news services, writing reports and briefings, drafting consultation responses and developing political campaign strategies.
Clients have included Greenpeace, Nuclear Free Local Authorities, WWF Scotland and the UK Government’s Committee on Radioactive Waste Management.
Sign up for our daily energy and environment news service and get the daily news roundup emailed to you every morning. It’s free to sign up, but if you find the service useful and can afford it, please consider making a donation to help us continue the service.
If you find the resources on this site useful, please consider making a contribution to the running of the site.