{
  "url": "https://openlegislation.uk/private-water-supplies-regulations-1991/regulation-9",
  "json_url": "https://openlegislation.uk/private-water-supplies-regulations-1991/regulation-9.json",
  "legislation": "uksi/1991/2790",
  "legislation_title": "The Private Water Supplies Regulations 1991",
  "legislation_url": "https://openlegislation.uk/private-water-supplies-regulations-1991",
  "path": "regulation/9",
  "kind": "regulation",
  "number": "9",
  "heading": "Category one supplies",
  "text": "(1) For the purposes of this Part, a private supply is a category one supply if any water from the supply is supplied for domestic purposes and the supply is not a category two supply.\n(2) Subject to paragraph (3), category one supplies shall be divided into classes in accordance with the following Table by reference to the number of persons supplied with water for domestic purposes and the relevant average daily volume of water supplied; but, if those factors would result in a supply falling into different classes, it shall be treated as falling into the class which is earlier in the alphabetical sequence.\nTable\nClass\nNumber of persons supplied with water for domestic purposes\nRelevant average daily volume of water supplied in m3/day\nA\n>5,000\n>1,000\nB\n501 to 5,000\n101 to 1,000\nC\n101 to 500\n21 to 100\nD\n25 to 100\n5 to 20\nE\n<25\n<5\n(3) A category one supply which only serves a single dwelling shall be classified as a class F supply.\n(4) Subject to regulation 11, references in this regulation–\n(a) to the number of persons supplied with water for domestic purposes are references to such number of persons as the local authority shall estimate was the maximum number normally served by the supply for those purposes on any one day during the year prior to the year in which the classification is made; and\n(b) to the relevant average daily volume of water supplied are references to such volume (calculated as a daily average) as the local authority shall estimate was distributed, or, if not distributed, was used or consumed, for domestic purposes or the purposes mentioned in regulation 10(2)(a) during the year prior to the year in which the classification is made.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1991/2790/regulation/9",
    "retrieved_at": "2026-10-29T14:32:48.534038+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."
}