{
  "url": "https://openlegislation.uk/surface-waters-dangerous-substances-classification-regulations-northern-ireland-1998/schedule-4/paragraph-1",
  "json_url": "https://openlegislation.uk/surface-waters-dangerous-substances-classification-regulations-northern-ireland-1998/schedule-4/paragraph-1.json",
  "legislation": "nisr/1998/397",
  "legislation_title": "Surface Waters (Dangerous Substances) (Classification) Regulations (Northern Ireland) 1998",
  "legislation_url": "https://openlegislation.uk/surface-waters-dangerous-substances-classification-regulations-northern-ireland-1998",
  "path": "schedule/4/paragraph/1",
  "kind": "paragraph",
  "number": "1",
  "heading": null,
  "text": "Subject to paragraph 2, the criteria for the classification DS4 are that—\n(a) the annual mean concentration of each substance listed in column (1) of Table 4 in samples taken from the sampling point for the waters in question in accordance with regulation 4 does not exceed the relevant limit shown in column (2) of that Table; and\n(b) the concentration of each substance listed in column (1) of Table 5 in each sample so taken does not exceed the relevant limit shown in column (2) of that Table.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/1998/397/schedule/4/paragraph/1",
    "retrieved_at": "2026-10-29T02:22:19.119822+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."
}