{
  "url": "https://openlegislation.uk/air-quality-standards-regulations-northern-ireland-2010/schedule-5",
  "json_url": "https://openlegislation.uk/air-quality-standards-regulations-northern-ireland-2010/schedule-5.json",
  "legislation": "nisr/2010/188",
  "legislation_title": "The Air Quality Standards Regulations (Northern Ireland) 2010",
  "legislation_url": "https://openlegislation.uk/air-quality-standards-regulations-northern-ireland-2010",
  "path": "schedule/5",
  "kind": "schedule",
  "number": "5",
  "heading": "Information and alert thresholds",
  "text": "Alert thresholds for Sulphur dioxide and Nitrogen dioxide\nPollutant\nAlert threshold\n(1)To be measured over three consecutive hours at locations representative of air quality over the least 100 km2 or an entire zone, whichever is smaller.\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": "N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 5 in operation at 11.6.2010, see reg. 1"
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "(1)To be measured over three consecutive hours at locations representative of air quality over the least 100 km2 or an entire zone, whichever is smaller."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2010/188/schedule/5",
    "retrieved_at": "2026-10-29T01:26:55.517845+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."
}