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Independent service run by Suffrago – not an official government website. Every figure comes from an official UK publisher under its open licence and is checked against that source each time the data is refreshed.

Carbon intensity of Great Britain's electricity

Grams of carbon dioxide emitted for each kilowatt-hour of electricity used in Great Britain, daily average over the last 30 full days, from the National Energy System Operator.

Daily average, latest full day

260 gCO₂/kWh

8 Nov 2026

Verified against source, 9 November 2026, 14:52 UTC
Daily average
010020030010 Oct 2615 Oct 2620 Oct 2625 Oct 2630 Oct 264 Nov 268 Nov 26260

Source: National Energy System Operator (NESO). Licensed under CC BY 4.0.

Data table

30 periods, newest first

PeriodDaily average
8 Nov 2026260 gCO₂/kWh
7 Nov 2026256 gCO₂/kWh
6 Nov 2026238 gCO₂/kWh
5 Nov 2026179 gCO₂/kWh
4 Nov 2026169 gCO₂/kWh
3 Nov 2026166 gCO₂/kWh
2 Nov 2026147 gCO₂/kWh
1 Nov 2026171 gCO₂/kWh
31 Oct 2026189 gCO₂/kWh
30 Oct 2026180 gCO₂/kWh
29 Oct 2026209 gCO₂/kWh
28 Oct 2026133 gCO₂/kWh
27 Oct 202680 gCO₂/kWh
26 Oct 202681 gCO₂/kWh
25 Oct 202672 gCO₂/kWh
24 Oct 202674 gCO₂/kWh
23 Oct 202681 gCO₂/kWh
22 Oct 2026106 gCO₂/kWh
21 Oct 202697 gCO₂/kWh
20 Oct 2026121 gCO₂/kWh
19 Oct 2026148 gCO₂/kWh
18 Oct 202694 gCO₂/kWh
17 Oct 202665 gCO₂/kWh
16 Oct 2026116 gCO₂/kWh
15 Oct 2026109 gCO₂/kWh
14 Oct 2026100 gCO₂/kWh
13 Oct 202682 gCO₂/kWh
12 Oct 2026116 gCO₂/kWh
11 Oct 2026126 gCO₂/kWh
10 Oct 202655 gCO₂/kWh

Download CSVDownload JSON with full provenance

Source and licence

Publisher
National Energy System Operator (NESO)
Check it yourself
https://carbon-intensity.github.io/api-definitions/#intensity
Licence
Creative Commons Attribution 4.0 – Licensed under CC BY 4.0.
Retrieved
9 November 2026, 14:49 UTC
Raw files fetched

Verification

Verified against source, 9 November 2026, 14:52 UTC Run at 9 November 2026, 14:52 UTC; 30 of 30 figures matched the live source.

ResultCheckDetail
PassProvenance recordedNational Energy System Operator (NESO); Creative Commons Attribution 4.0; retrieved 2026-11-09T14:49:21Z; 1 raw file(s)
PassRaw files match recorded SHA-2561 of 1 files intact
PassRe-parsing raw files reproduces figures30 of 30 figures and the headline reproduced
PassFigures are finite numbers30 figures, 0 invalid
PassLive source matches every figure30 of 30 figures match exactly after downloading 1 source file(s) again (1 byte-identical); the headline matches
PassNESO daily statistics agree30 of 30 daily averages match NESO's daily statistics (https://api.carbonintensity.org.uk/intensity/stats/2026-10-10T00:00Z/2026-11-09T00:00Z/24)
PassSource page answershttps://carbon-intensity.github.io/api-definitions/#intensity – HTTP 200

Notes

  • Each day is the average of NESO's 48 half-hourly "actual" readings for that UTC day, rounded to a whole gram as NESO's own daily statistics are. Days missing a reading are left out.