In November 2022, Britain's electricity averaged 169 gCO₂/kWh, in the moderate band (140–219 g). That is 8% dirtier than October 2022 (156 g), and 8% cleaner than November 2021 (184 g). Gas made 37.7% of the electricity generated, wind 35.0%, nuclear 13.5% and imports 4.9%; low-carbon sources together made 57.0%. The cleanest half hour was 59 g at 23:00 on Tuesday 1 November, and the dirtiest 311 g at 21:00 on Monday 28 November. The cleanest day was Tuesday 8 November (98 g on average); the windiest was Wednesday 2 November (54.9% wind).
Carbon intensity, day by day
Day by day, as a table
| Day | gCO₂/kWh | Low-carbon | Wind | Solar | Gas | Half hours |
|---|---|---|---|---|---|---|
| Tue 1 Nov | 101 | 73.3% | 51.0% | 1.8% | 20.9% | 48 |
| Wed 2 Nov | 107 | 74.0% | 54.9% | 1.3% | 20.6% | 48 |
| Thu 3 Nov | 185 | 48.5% | 22.5% | 1.9% | 42.7% | 48 |
| Fri 4 Nov | 170 | 54.0% | 27.1% | 2.9% | 39.5% | 48 |
| Sat 5 Nov | 159 | 56.1% | 34.0% | 0.6% | 34.9% | 48 |
| Sun 6 Nov | 110 | 66.7% | 43.1% | 1.1% | 21.8% | 48 |
| Mon 7 Nov | 102 | 72.0% | 51.7% | 0.5% | 22.7% | 48 |
| Tue 8 Nov | 98 | 72.1% | 52.8% | 1.5% | 21.8% | 48 |
| Wed 9 Nov | 114 | 67.8% | 44.4% | 2.2% | 26.8% | 48 |
| Thu 10 Nov | 102 | 72.4% | 51.2% | 0.6% | 22.5% | 48 |
| Fri 11 Nov | 113 | 71.0% | 48.9% | 0.9% | 25.4% | 48 |
| Sat 12 Nov | 198 | 47.7% | 23.3% | 1.8% | 47.1% | 48 |
| Sun 13 Nov | 172 | 54.9% | 29.5% | 1.9% | 39.2% | 48 |
| Mon 14 Nov | 211 | 46.4% | 23.1% | 0.8% | 47.6% | 48 |
| Tue 15 Nov | 163 | 59.4% | 37.3% | 0.6% | 36.9% | 48 |
| Wed 16 Nov | 176 | 54.7% | 32.3% | 1.1% | 39.7% | 48 |
| Thu 17 Nov | 148 | 61.2% | 40.2% | 0.9% | 33.7% | 48 |
| Fri 18 Nov | 169 | 56.9% | 35.4% | 1.4% | 39.6% | 48 |
| Sat 19 Nov | 199 | 50.0% | 29.3% | 1.4% | 47.5% | 48 |
| Sun 20 Nov | 203 | 50.6% | 27.8% | 1.6% | 48.3% | 48 |
| Mon 21 Nov | 214 | 49.6% | 28.8% | 0.3% | 48.3% | 48 |
| Tue 22 Nov | 226 | 42.4% | 18.8% | 1.4% | 51.5% | 48 |
| Wed 23 Nov | 160 | 60.9% | 40.6% | 1.3% | 36.6% | 48 |
| Thu 24 Nov | 137 | 67.6% | 48.4% | 0.8% | 30.6% | 48 |
| Fri 25 Nov | 147 | 63.5% | 42.2% | 1.9% | 35.0% | 48 |
| Sat 26 Nov | 146 | 65.4% | 48.0% | 0.7% | 33.0% | 48 |
| Sun 27 Nov | 170 | 60.0% | 41.1% | 0.6% | 36.8% | 48 |
| Mon 28 Nov | 277 | 32.5% | 9.7% | 1.5% | 57.8% | 48 |
| Tue 29 Nov | 292 | 25.9% | 3.8% | 0.6% | 61.6% | 48 |
| Wed 30 Nov | 290 | 31.2% | 9.3% | 0.7% | 59.7% | 48 |
What powered the grid
Each fuel's average share of the electricity generated in Great Britain in November 2022, with November 2021 beneath it for comparison. Imports count as one source, as NESO counts them.
Hours in each carbon band
- Very low (under 70 g): 21 hours, 3%
- Low (70–139 g): 225 hours, 31%
- Moderate (140–219 g): 325 hours, 45%
- High (220–299 g): 138 hours, 19%
- Very high (300 g or more): 12 hours, 2%
Records in November 2022
- Cleanest half hour
- 59 g 23:00 on Tuesday 1 November
- Dirtiest half hour
- 311 g 21:00 on Monday 28 November
- Most wind
- 66.4% 23:30 on Saturday 26 November
- Most solar
- 13.3% 11:30 on Friday 4 November
- Most low-carbon
- 85.4% 02:00 on Friday 11 November
- Least gas
- 13.1% 23:00 on Tuesday 1 November
- Cleanest day
- 98 g Tuesday 8 November
- Dirtiest day
- 292 g Tuesday 29 November
- Windiest day
- 54.9% wind Wednesday 2 November
- Sunniest day
- 2.9% solar Friday 4 November
About these figures
GridMonkey records NESO's carbon intensity and generation mix for Great Britain every half hour: the actual figure where NESO has published one, otherwise its forecast. They are added up by UK calendar day and month. Percentages are shares of the electricity generated, imports included, so the fuels add up to 100%. Low-carbon means wind, solar, nuclear, biomass and hydro. The carbon bands are GridMonkey's: very low under 70 g, low 70–139 g, moderate 140–219 g, high 220–299 g and very high 300 g or more, per kWh. Northern Ireland has its own grid and isn't included.
To see the grid now, open GridMonkey. For the wind farms that ran hardest this week, see the wind farm league table.
Data: NESO Carbon Intensity API (carbonintensity.org.uk), licensed under CC BY 4.0, recorded and summarised by GridMonkey. Figures as of 24 October 2026.