{
  "url": "https://openlegislation.uk/surface-waters-abstraction-for-drinking-water-classification-regulations-1996/schedule-2/part-II",
  "json_url": "https://openlegislation.uk/surface-waters-abstraction-for-drinking-water-classification-regulations-1996/schedule-2/part-II.json",
  "legislation": "uksi/1996/3001",
  "legislation_title": "The Surface Waters (Abstraction for Drinking Water) (Classification) Regulations 1996",
  "legislation_url": "https://openlegislation.uk/surface-waters-abstraction-for-drinking-water-classification-regulations-1996",
  "path": "schedule/2/part/II",
  "kind": "part",
  "number": "II",
  "heading": "MINIMUM ANNUAL FREQUENCY OF SAMPLING FOR EACH PARAMETER",
  "text": "Population served\nClassification DW1\nClassification DW2\nClassification DW3\nA\nB\nC\nD\nE\nF\nG\nH\nJ\n1 This column applies to the parameters—coloration, temperature and nitrates.\n2 This column applies to the parameters—dissolved iron, copper, zinc, sulphates and phenols.\n3 This column applies to the parameters—fluorides, arsenic, cadmium, total chromium, lead, selenium, mercury, barium, cyanide, dissolved or emulsified hydrocarbons, polycyclic aromatic hydrocarbons and total pesticides.\n4 This column applies to the parameters—coloration, temperature, nitrates and ammonium.\n5 This column applies to dissolved iron, zinc, sulphates and phenols.\n6 This column applies to the parameters—arsenic, cadmium, total chromium, lead, selenium, mercury, barium, cyanide, dissolved or emulsified hydrocarbons, polycyclic aromatic hydrocarbons and total pesticides.\n7 This column applies to the parameters—zinc, sulphates and phenols.\n≤10,000\n1\n1\n1\n1\n1\n1\n2\n1\n1\n>10,000 to ≤30,000\n1\n1\n1\n2\n1\n1\n3\n1\n1\n>30,000 to ≤100,000\n2\n1\n1\n4\n2\n1\n6\n2\n1\n>100,000\n3\n2\n1\n8\n4\n1\n12\n4\n1",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "1 This column applies to the parameters—coloration, temperature and nitrates."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "2 This column applies to the parameters—dissolved iron, copper, zinc, sulphates and phenols."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "3 This column applies to the parameters—fluorides, arsenic, cadmium, total chromium, lead, selenium, mercury, barium, cyanide, dissolved or emulsified hydrocarbons, polycyclic aromatic hydrocarbons and total pesticides."
    },
    {
      "type": "footnote",
      "label": "f4",
      "text": "4 This column applies to the parameters—coloration, temperature, nitrates and ammonium."
    },
    {
      "type": "footnote",
      "label": "f5",
      "text": "5 This column applies to dissolved iron, zinc, sulphates and phenols."
    },
    {
      "type": "footnote",
      "label": "f6",
      "text": "6 This column applies to the parameters—arsenic, cadmium, total chromium, lead, selenium, mercury, barium, cyanide, dissolved or emulsified hydrocarbons, polycyclic aromatic hydrocarbons and total pesticides."
    },
    {
      "type": "footnote",
      "label": "f7",
      "text": "7 This column applies to the parameters—zinc, sulphates and phenols."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1996/3001/schedule/2/part/II",
    "retrieved_at": "2026-10-29T12:31:11.165973+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."
}