{
  "url": "https://openlegislation.uk/water-supply-water-quality-regulations-2018/schedule-3/part-3/paragraph-wrapper9n1",
  "json_url": "https://openlegislation.uk/water-supply-water-quality-regulations-2018/schedule-3/part-3/paragraph-wrapper9n1.json",
  "legislation": "wsi/2018/647",
  "legislation_title": "The Water Supply (Water Quality) Regulations 2018",
  "legislation_url": "https://openlegislation.uk/water-supply-water-quality-regulations-2018",
  "path": "schedule/3/part/3/paragraph/wrapper9n1",
  "kind": "paragraph",
  "number": null,
  "heading": null,
  "text": "Note: This table and each table which follows it in this Part set out the annual sampling frequencies for all the substances and parameters comprising each of the groups to which they correspond at treatment works or supply points, those groups having been outlined in Part 1 of this Schedule. The frequencies are determined according to the volume of water supplied at each treatment works or supply point. The number of samples to be taken is the standard number specified in column 2, unless a notice varying this number has been issued under regulation 9.\nVolume of water supplied m 3/day\nStandard sampling frequency per year\n<20\n4\n20-1,999\n52\n2,000-5,999\n104\n6,000-11,999\n208\n≥12,000\n365\nTable 12\nAnnual sampling frequencies for Group A3 parameters: treatment works or supply points\nVolume of water supplied m 3/day\nStandard sampling frequency per year\n<20\n2\n20-999\n4\n1,000-1999\n12\n2,000-5,999\n24\n6,000-9,999\n36\n10,000-15,999\n52\n16,000-32,999\n104\n33,000-49,999\n156\n50,000-67,999\n208\n68,000-84,999\n260\n85,000-101,999\n312\n102,000-119,999\n365\n120,000-241,999\n730\n242,000-484,999\n1,460\n485,000-728,999\n2,190\nTable 13\nAnnual sampling frequencies for Group B2 parameters: treatment works or supply points\nVolume of water supplied m 3/day\nStandard sampling frequency per year\n<20\n1\n20-999\n4\n1,000-49,999\n8\n50,000-89,999\n12\n90,000-299,999\n24\n300,000-649,999\n36\n≥650,000\n48",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2018/647/schedule/3/part/3/paragraph/wrapper9n1",
    "retrieved_at": "2026-10-28T23:23:05.047051+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."
}