{
  "generated": "2026-10-08T02:57:47.060Z",
  "licence": {
    "id": "CC-BY-4.0",
    "name": "Creative Commons Attribution 4.0",
    "url": "https://creativecommons.org/licenses/by/4.0/"
  },
  "attribution": "UK Energy Data (ukenergydata.co.uk), from the Carbon Intensity API (NESO and partners), NESO data (Supported by National Energy SO Open Data) and the Octopus Energy public API",
  "source": [
    {
      "name": "Carbon Intensity API (NESO and partners)",
      "url": "https://carbonintensity.org.uk",
      "licence": "Creative Commons Attribution 4.0",
      "licenceUrl": "https://creativecommons.org/licenses/by/4.0/",
      "credit": "Carbon Intensity API (NESO and partners)"
    },
    {
      "name": "NESO daily balancing costs and constraint breakdown",
      "url": "https://www.neso.energy/data-portal/daily-balancing-costs-balancing-services-use-system",
      "licence": "NESO Open Data Licence",
      "licenceUrl": "https://www.neso.energy/data-portal/neso-open-licence",
      "credit": "Supported by National Energy SO Open Data"
    },
    {
      "name": "Octopus Energy public API (Agile Octopus, London)",
      "url": "https://developer.octopus.energy",
      "licence": null,
      "licenceUrl": null,
      "credit": "Octopus Energy. Only monthly summary figures are given here; the half-hourly prices are not republished."
    }
  ],
  "documentation": "https://www.ukenergydata.co.uk/developers#reports",
  "data": {
    "month": "2026-08",
    "title": "State of the grid: August 2026",
    "url": "https://www.ukenergydata.co.uk/state-of-the-grid/2026-08",
    "summary": [
      "Great Britain's electricity averaged 125 grams of CO₂ per kWh in August 2026, about the same as in August 2025 (124 g/kWh).",
      "Wind and gas were almost level, at 23.7% and 23.6% of generation, with nuclear next at 15%. Zero-carbon sources (wind, solar, nuclear and hydro) made up 51%, and wind's share peaked at 61.8% at 04:00 on Thursday 6 August.",
      "The cleanest day was Wednesday 5 August (65 g/kWh) and the dirtiest Monday 17 August (207 g/kWh). The cleanest single half-hour, 34 g/kWh, was at 11:30 on Thursday 6 August.",
      "Intensity was below 100 g/kWh in 37% of half-hours, the same share as a year earlier.",
      "Balancing the grid cost NESO £193 million. Of that, £173 million (89%) went on constraints, mostly paying generators to change output when power lines were full (£141 million), and 824 GWh of generation was turned down because the network could not carry it.",
      "On Agile Octopus in London, the unit price averaged 25.1p/kWh and ranged from −4.2p to 68.6p. Prices were below zero in 29 half-hours, when customers were paid to use electricity."
    ],
    "intensity": {
      "mean": 125,
      "min": {
        "value": 34,
        "from": "2026-08-06T10:30Z"
      },
      "max": {
        "value": 243,
        "from": "2026-08-17T03:30Z"
      },
      "share": {
        "wind": 23.7,
        "solar": 10.9,
        "nuclear": 14.9,
        "gas": 23.6,
        "imports": 14.4,
        "biomass": 8.8,
        "hydro": 1.3,
        "coal": 0,
        "other": 2.3
      },
      "zeroCarbon": 50.9,
      "peakWind": {
        "value": 61.8,
        "from": "2026-08-06T03:00Z"
      },
      "halfHoursUnder100": 554,
      "halfHours": 1487,
      "cleanestDay": {
        "date": "2026-08-05",
        "mean": 65
      },
      "dirtiestDay": {
        "date": "2026-08-17",
        "mean": 207
      },
      "days": [
        {
          "date": "2026-08-01",
          "mean": 112
        },
        {
          "date": "2026-08-02",
          "mean": 129
        },
        {
          "date": "2026-08-03",
          "mean": 121
        },
        {
          "date": "2026-08-04",
          "mean": 129
        },
        {
          "date": "2026-08-05",
          "mean": 65
        },
        {
          "date": "2026-08-06",
          "mean": 102
        },
        {
          "date": "2026-08-07",
          "mean": 126
        },
        {
          "date": "2026-08-08",
          "mean": 94
        },
        {
          "date": "2026-08-09",
          "mean": 96
        },
        {
          "date": "2026-08-10",
          "mean": 136
        },
        {
          "date": "2026-08-11",
          "mean": 123
        },
        {
          "date": "2026-08-12",
          "mean": 125
        },
        {
          "date": "2026-08-13",
          "mean": 184
        },
        {
          "date": "2026-08-14",
          "mean": 169
        },
        {
          "date": "2026-08-15",
          "mean": 125
        },
        {
          "date": "2026-08-16",
          "mean": 171
        },
        {
          "date": "2026-08-17",
          "mean": 207
        },
        {
          "date": "2026-08-18",
          "mean": 150
        },
        {
          "date": "2026-08-19",
          "mean": 175
        },
        {
          "date": "2026-08-20",
          "mean": 149
        },
        {
          "date": "2026-08-21",
          "mean": 131
        },
        {
          "date": "2026-08-22",
          "mean": 82
        },
        {
          "date": "2026-08-23",
          "mean": 113
        },
        {
          "date": "2026-08-24",
          "mean": 111
        },
        {
          "date": "2026-08-25",
          "mean": 80
        },
        {
          "date": "2026-08-26",
          "mean": 107
        },
        {
          "date": "2026-08-27",
          "mean": 147
        },
        {
          "date": "2026-08-28",
          "mean": 102
        },
        {
          "date": "2026-08-29",
          "mean": 110
        },
        {
          "date": "2026-08-30",
          "mean": 107
        },
        {
          "date": "2026-08-31",
          "mean": 84
        }
      ]
    },
    "lastYear": {
      "month": "2025-08",
      "mean": 124,
      "share": {
        "wind": 27.7,
        "solar": 9.8,
        "nuclear": 12.6,
        "gas": 25.6,
        "imports": 15.8,
        "biomass": 8.5,
        "coal": 0,
        "other": 0
      },
      "zeroCarbon": 50,
      "missing": [
        "hydro"
      ]
    },
    "balancing": {
      "days": 31,
      "total": 193321044,
      "constraints": 172509351,
      "turnedDownMwh": 823650,
      "turnedDownDays": 31,
      "thermal": 141029377
    },
    "agile": {
      "region": "C",
      "regionName": "London",
      "product": "AGILE-24-10-01",
      "mean": 25.1,
      "min": -4.2,
      "max": 68.6,
      "negative": 29,
      "halfHours": 1488
    }
  }
}