{
  "url": "https://openlegislation.uk/air-quality-standards-regulations-2010/schedule-5",
  "json_url": "https://openlegislation.uk/air-quality-standards-regulations-2010/schedule-5.json",
  "legislation": "uksi/2010/1001",
  "legislation_title": "The Air Quality Standards Regulations 2010",
  "legislation_url": "https://openlegislation.uk/air-quality-standards-regulations-2010",
  "path": "schedule/5",
  "kind": "schedule",
  "number": "5",
  "heading": "Information and alert thresholds",
  "text": "Alert thresholds for Sulphur dioxide and Nitrogen dioxide\n1 To be measured over three consecutive hours at locations representative of air quality over at least 100 km 2 or an entire zone, whichever is smaller.\nPollutant\nAlert threshold 1\nSulphur dioxide\n500 µg/m3\nNitrogen dioxide\n400 µg/m3\nInformation and alert thresholds for ozone\nPurpose\nAveraging period\nthreshold\nInformation\n1 hour\n180 µg/m3\nAlert\n1 hour\n240 µg/m3",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2010/1001/schedule/5",
    "retrieved_at": "2026-10-29T02:45:20.255559+00:00"
  },
  "licence": "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. Source: legislation.gov.uk, The National Archives."
}