{
  "url": "https://openlegislation.uk/air-quality-standards-scotland-regulations-2010/schedule-3/paragraph-wrapper2n1",
  "json_url": "https://openlegislation.uk/air-quality-standards-scotland-regulations-2010/schedule-3/paragraph-wrapper2n1.json",
  "legislation": "ssi/2010/204",
  "legislation_title": "The Air Quality Standards (Scotland) Regulations 2010",
  "legislation_url": "https://openlegislation.uk/air-quality-standards-scotland-regulations-2010",
  "path": "schedule/3/paragraph/wrapper2n1",
  "kind": "paragraph",
  "number": null,
  "heading": null,
  "text": "(a) The maximum daily eight hour mean concentration must be selected by examining eight hour running averages, calculated from hourly data and updated each hour. Each eight hour average so calculated must be assigned to the day on which it ends, that is, the first calculation period for any one day will be the period from 1700 hours on the previous day to 0100 hours on that day; the last calculation period for any one day will be the period from 1600 hours to 2400 hours on the day.\n(b) If the three or five year averages cannot be determined on the basis of a full and consecutive set of annual data, the minimum annual data required for checking compliance with target values will be as follows:—\n(i) for the target value for the protection of human health: valid data for one year; and\n(ii) for the target value for the protection of vegetation: valid data for three years.\nPM2.5\nAveraging period\nTarget value\nCalendar year\n25 µg/m3",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ssi/2010/204/schedule/3/paragraph/wrapper2n1",
    "retrieved_at": "2026-10-28T21:55:33.792627+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."
}