{
  "url": "https://openlegislation.uk/environmental-protection-prescribed-processes-and-substances-regulations-1991/schedule-5",
  "json_url": "https://openlegislation.uk/environmental-protection-prescribed-processes-and-substances-regulations-1991/schedule-5.json",
  "legislation": "uksi/1991/472",
  "legislation_title": "The Environmental Protection (Prescribed Processes and Substances) Regulations 1991",
  "legislation_url": "https://openlegislation.uk/environmental-protection-prescribed-processes-and-substances-regulations-1991",
  "path": "schedule/5",
  "kind": "schedule",
  "number": "5",
  "heading": "RELEASE INTO WATER: PRESCRIBED SUBSTANCES",
  "text": "(1)\n(2)\nSubstance\nAmount in excess of background quantity released in any 12 month period (Grammes)\n*Where both Atrazine and Simazine are released, the figure in aggregate is 350 grammes.\nMercury and its compounds\n200 (expressed as metal)\nCadmium and its compounds\n1000 (expressed as metal)\nAll isomers of hexachlorocyclohexane\n20\nAll isomers of DDT\n5\nPentachlorophenol and its compounds\n350 (expressed as PCP)\nHexachlorobenzene\n5\nHexachlorobutadiene\n20\nAldrin\n2\nDieldrin\n2\nEndrin\n1\nPolychlorinated Biphenyls\n1\nDichlorvos\n0.2\n1,2-Dichloroethane\n2000\nAll isomers of trichlorobenzene\n75\nAtrazine\n350\nSimazine\n350\nTributyltin compounds\n4 (expressed as TBT)\nTriphenyltin compounds\n4 (expressed as TPT)\nTrifluralin\n20\nFenitrothion\n2\nAzinphos-methyl\n2\nMalathion\n2\nEndosulfan\n0.5",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Regulations revoked (E.W.) (6.4.2008) by The Environmental Permitting (England and Wales) Regulations 2007 (S.I. 2007/3538), reg. 1(1)(b), Sch. 22 (with regs. 69-72); and lapsed (S.) by virtue of repeal of power conferring provision 1990 c. 43, s. 2 (S.) (1.4.2015) by Pollution Prevention and Control Act 1999 (c. 24), s. 7(3), Sch. 3 (with s. 7(7)); S.S.I. 2015/74, art. 2(2)(b)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Sch. 5 substituted (1.12.1994) by The Environmental Protection (Prescribed Processes and Substances Etc.) (Amendment) Regulations 1994 (S.I. 1994/1271), regs. 1, 4(5), Sch. 5 (with Sch. 6)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Words in Sch. 5 inserted (8.1.1996) by The Environmental Protection (Prescribed Processes and Substances) (Amendment) Regulations 1995 (S.I. 1995/3247), reg. 1(1), Sch. 1 para. 10(a) (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Words in Sch. 5 inserted (8.1.1996) by The Environmental Protection (Prescribed Processes and Substances) (Amendment) Regulations 1995 (S.I. 1995/3247), reg. 1(1), Sch. 1 para. 10(b) (with Sch. 2)"
    },
    {
      "type": "F",
      "label": "F5",
      "text": "Words in Sch. 5 inserted (8.1.1996) by The Environmental Protection (Prescribed Processes and Substances) (Amendment) Regulations 1995 (S.I. 1995/3247), reg. 1(1), Sch. 1 para. 10(c) (with Sch. 2)"
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "*Where both Atrazine and Simazine are released, the figure in aggregate is 350 grammes."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1991/472/schedule/5",
    "retrieved_at": "2026-10-29T14:49:53.509555+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."
}