{
  "url": "https://openlegislation.uk/air-quality-standards-wales-regulations-2007/schedule-4/part-2",
  "json_url": "https://openlegislation.uk/air-quality-standards-wales-regulations-2007/schedule-4/part-2.json",
  "legislation": "wsi/2007/717",
  "legislation_title": "The Air Quality Standards (Wales) Regulations 2007",
  "legislation_url": "https://openlegislation.uk/air-quality-standards-wales-regulations-2007",
  "path": "schedule/4/part/2",
  "kind": "part",
  "number": "2",
  "heading": "Assessment thresholds for Group B pollutants",
  "text": "Upper assessment threshold\n60% of target value (3.6 ng/m3)\nLower assessment threshold\n40% of target value (2.4 ng/m3)",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2007/717/schedule/4/part/2",
    "retrieved_at": "2026-10-29T00:01:33.213395+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."
}