{
 "id": "air-pollution-days-uk",
 "title": "Days of moderate or higher air pollution, UK",
 "category": "energy-environment",
 "summary": "The average number of days a year on which a UK monitoring site recorded air pollution at 'moderate' or higher on the Daily Air Quality Index, at urban and rural sites, since 2010.",
 "unit": "days",
 "chart": "line",
 "volatile": false,
 "status": "",
 "notes": [
  "A day counts when any of ozone, nitrogen dioxide, sulphur dioxide, PM2.5 or PM10 reached band 4 ('moderate') or above on the Daily Air Quality Index at the site; the figure is the mean over the sites measured that year. Ozone, which peaks in sunny summers, accounts for most rural days."
 ],
 "provenance": {
  "publisher": "Department for Environment, Food & Rural Affairs",
  "publisher_url": "https://www.gov.uk/government/organisations/department-for-environment-food-rural-affairs",
  "source_page": "https://www.gov.uk/government/statistical-data-sets/env02-air-quality-statistics",
  "licence": "OGL-3.0",
  "licence_name": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0.",
  "retrieved_at": "2026-10-30T11:41:24Z",
  "raw_files": [
   {
    "name": "page.json",
    "url": "https://www.gov.uk/api/content/government/statistical-data-sets/env02-air-quality-statistics",
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    "bytes": 89218,
    "content_type": "application/json"
   },
   {
    "name": "table.days.csv",
    "url": "https://assets.publishing.service.gov.uk/media/6a3b9a5dd52550a19950f2d9/fig17_urban_days_above_moderate.csv",
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    "bytes": 868,
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   }
  ]
 },
 "meta": {
  "latest_period": "2025",
  "govuk_page": "/government/statistical-data-sets/env02-air-quality-statistics",
  "govuk_page_title": "ENV02 - Air quality statistics",
  "attachment_title": "Figure 17: Mean number of days per urban site when air pollution was ‘Moderate’ or higher in the UK, 2010 to 2025"
 },
 "headline": {
  "label": "Days per urban site",
  "value": 11.775,
  "period": "2025"
 },
 "series": [
  {
   "name": "Urban sites",
   "points": [
    {
     "x": "2010",
     "v": 15.581818181818182
    },
    {
     "x": "2011",
     "v": 23.553571428571427
    },
    {
     "x": "2012",
     "v": 18.196428571428573
    },
    {
     "x": "2013",
     "v": 15.25
    },
    {
     "x": "2014",
     "v": 12.927272727272728
    },
    {
     "x": "2015",
     "v": 10.210526315789474
    },
    {
     "x": "2016",
     "v": 8.78688524590164
    },
    {
     "x": "2017",
     "v": 7.609375
    },
    {
     "x": "2018",
     "v": 8.850746268656716
    },
    {
     "x": "2019",
     "v": 12.1375
    },
    {
     "x": "2020",
     "v": 9.94047619047619
    },
    {
     "x": "2021",
     "v": 4.4
    },
    {
     "x": "2022",
     "v": 9.308510638297872
    },
    {
     "x": "2023",
     "v": 8.571428571428571
    },
    {
     "x": "2024",
     "v": 6.201923076923077
    },
    {
     "x": "2025",
     "v": 11.775
    }
   ]
  },
  {
   "name": "Rural sites",
   "points": [
    {
     "x": "2010",
     "v": 9.818181818181818
    },
    {
     "x": "2011",
     "v": 16.17391304347826
    },
    {
     "x": "2012",
     "v": 13.05
    },
    {
     "x": "2013",
     "v": 17.095238095238095
    },
    {
     "x": "2014",
     "v": 9.954545454545455
    },
    {
     "x": "2015",
     "v": 11.095238095238095
    },
    {
     "x": "2016",
     "v": 11.380952380952381
    },
    {
     "x": "2017",
     "v": 8.80952380952381
    },
    {
     "x": "2018",
     "v": 25.8
    },
    {
     "x": "2019",
     "v": 18.75
    },
    {
     "x": "2020",
     "v": 20.94736842105263
    },
    {
     "x": "2021",
     "v": 11.833333333333334
    },
    {
     "x": "2022",
     "v": 20.5
    },
    {
     "x": "2023",
     "v": 18.6
    },
    {
     "x": "2024",
     "v": 11.0
    },
    {
     "x": "2025",
     "v": 18.91304347826087
    }
   ]
  }
 ]
}