{
  "url": "https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002/schedule-5/part-I/paragraph-wrapper14n1",
  "json_url": "https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002/schedule-5/part-I/paragraph-wrapper14n1.json",
  "legislation": "wsi/2002/3183",
  "legislation_title": "The Air Quality Limit Values (Wales) Regulations 2002",
  "legislation_url": "https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002",
  "path": "schedule/5/part/I/paragraph/wrapper14n1",
  "kind": "paragraph",
  "number": null,
  "heading": null,
  "text": "The following data-quality objectives for the required accuracy of assessment methods, of minimum time coverage and of data capture of measurement are laid down to guide quality-assurance programmes.\nSulphur dioxide, nitrogen dioxide and oxides of nitrogen\nParticulate matter and lead\nContinuous measurement\nAccuracy\n15%\n25%\nMinimum data capture\n90%\n90%\nIndicative measurement\nAccuracy\n25%\n50%\nMinimum data capture\n90%\n90%\nMinimum time coverage\n14% (One measurement a week at random, evenly distributed over the year, or eight weeks evenly distributed over the year.)\n14% (One measurement a week at random, evenly distributed over the year, or eight weeks evenly distributed over the year.)\nModelling\nAccuracy:\nHourly averages\n50%—60%\nDaily averages\n50%\nAnnual averages\n30%\n50%\nObjective estimation\nAccuracy:\n75%\n100%",
  "extent": "E+W",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2002/3183/schedule/5/part/I/paragraph/wrapper14n1",
    "retrieved_at": "2026-10-29T00:12:37.924889+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."
}