{
  "url": "https://openlegislation.uk/air-quality-regulations-1997/schedule/paragraph-7",
  "json_url": "https://openlegislation.uk/air-quality-regulations-1997/schedule/paragraph-7.json",
  "legislation": "uksi/1997/3043",
  "legislation_title": "The Air Quality Regulations 1997",
  "legislation_url": "https://openlegislation.uk/air-quality-regulations-1997",
  "path": "schedule/paragraph/7",
  "kind": "paragraph",
  "number": "7",
  "heading": "Interpretation",
  "text": "(1) A daily maximum running 24 hour mean is a mean which is calculated on a daily basis, yielding one daily maximum running 24 hour mean per day. The daily maximum running 24 hour mean for a particular substance at a particular location for a particular day is the maximum of the 24 running 24 hour means recorded for that substance at that location during that day.\n(2) For the purpose of the calculation of a daily maximum running 24 hour mean—\n(a) a running 24 hour mean is a mean which is calculated on an hourly basis, yielding one running 24 hour mean per hour, and the runnning 24 hour mean for a particular substance at a particular location for a particular hour is the mean of the hourly means for that substance at that location for that hour and the preceding 23 hours;\n(b) “day” means the 24 hour period commencing immediately after midnight, Greenwich mean time.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1997/3043/schedule/paragraph/7",
    "retrieved_at": "2026-10-29T11:40:04.923689+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."
}