{
  "url": "https://openlegislation.uk/water-supply-water-quality-amendment-regulations-northern-ireland-2015-revoked/schedule-2",
  "json_url": "https://openlegislation.uk/water-supply-water-quality-amendment-regulations-northern-ireland-2015-revoked/schedule-2.json",
  "legislation": "nisr/2015/363",
  "legislation_title": "The Water Supply (Water Quality) (Amendment) Regulations (Northern Ireland) 2015 (revoked)",
  "legislation_url": "https://openlegislation.uk/water-supply-water-quality-amendment-regulations-northern-ireland-2015-revoked",
  "path": "schedule/2",
  "kind": "schedule",
  "number": "2",
  "heading": null,
  "text": "“\nTables 1-3 in Schedule 3 of the Water Supply (Water Quality) Regulations (Northern Ireland) 2007\nTable 1:\nParameters and circumstances for check monitoring\nItem\nParameter\nCircumstances\n1\nAluminium\nWhen used as a flocculant or where the water originates from, or is influenced by, surface waters.\n2\nAmmonium\n3\nClostridium pefringens (including spores)\nWhere the water originates from, or is influenced by, surface waters.\n4\nColiform bacteria\n5\nColony Counts\n6\nColour\n7\nConductivity\n8\nEscherichia coli (E.coli)\n9\nHydrogen ion\n10\nIndicative Dose\nWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken.\n11\nIron\nWhen used as a flocculant or where the water originates from, or is influenced by, surface waters.\n12\nManganese\nWhere the water originates from, or is influenced by, surface waters.\n13\nNitrate\nWhen chloramination is practised\n14\nNitrite\nWhen chloramination is practised\n15\nOdour\n16\nRadon\nWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken.\n17\nTaste\n18\nTritium\nWhere treatment to reduce the level of radionuclides in water intended for human consumption has been taken.\n19\nTurbidity\n. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\nTable 2\nAnnual Sampling Frequencies: Water Supply Zones\n1 Sampling for these parameters may be within water supply zones or at supply points as specified in Table 3, subject to notes (ii) and below (iii) below.\n2 Where the population is not an exact multiple of 5,000, the population figure should be rounded up to the nearest multiple of 5,000.\n3 Check monitoring in water supply zones is required only where chloramination is practised. In other circumstances audit monitoring is required.\n4 Audit monitoring in water supply zones is required only where sodium hypochlorite is added after water has left the treatment works. In other circumstances, audit monitoring is required at supply points.\n5 To monitor for indicative dose (for radioactivity).\n6 In the event that a single sample is taken in a year, a further sample should be taken if there is any change in relation to that supply that could affect the concentration of radionuclides in the water supply.\n(1)Substances and parameters subject to monitoring\n(2)Estimated population of water supply zone\n(3)Reduced\n(4)Standard\nSubject to check monitoring\nE.coli\n<100\n4\nColiform bacteria\n≥100\n12 per 5,000 population2\nResidual disinfectant\nAluminium\n<100\n1\n2\nAmmonium\n100-4,999\n2\n4\nClostridium perfringens\n(including spores)1\n5,000-9,999\n6\n12\nColony Counts\n10,000-29,999\n12\n24\nColour\n30,000-49,999\n18\n36\nConductivity1\n50,000-79,999\n26\n52\nHydrogen ion\n80,000-100,000\n38\n76\nIron\nManganese\nNitrate3\nNitrite3\nOdour\nTaste\nTurbidity\nSubject to audit monitoring\nAluminium\n<100\n1\nAntimony\n100-4,999\n4\nArsenic\n5,000-100,000\n8\nBenzene1\nBenzo(a)pyrene\nBoron1\nBromate4\nCadmium\nChromium\nClostridium perfringens\n(including spores)\nCopper\nCyanide1\n1,2, dichloroethane1\nEnterococci\nFluoride1\nGross Alpha156\nGross Beta156\nIron\nLead\nManganese\nMercury1\nNickel\nNitrate3\nNitrite3\nPesticides and related products1\nPolycyclic aromatic hydrocarbons\nRadon1\nSelenium\nSodium\nTrichloroethene/ Tetrachloroethene1\nTetrachloromethane1\nTrihalomethanes\nChloride1\nSulphate1\nTotal Organic carbon1\nTritium1\n. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\n. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\nTable 3:\nAnnual Sampling Frequencies: Treatment Works or Supply Points\n1 Check monitoring is required only in respect of surface waters (see regulation 6(2) and Table 1 in Schedule 3)\n2 Sampling at treatment works when chloramination is practised.\n3 Sampling at treatment works when chloramination is not practised.\n4 Audit monitoring at supply points is required only where sodium hypochlorite is not added after water has left the treatment works. In other circumstances, audit monitoring is required in water supply zones.\n5 To monitor for indicative dose (for radioactivity).\n(1)Item\n(2)Substances and parameters\n(3) Volume of water supplied m3/d\n(4)Reduced\n(5)Standard\n1\nE.coli\n<20\n-\n4\n2\nColiform bacteria\n20-1,999\n12\n52\n3\nColony counts\n2,000-5,999\n52\n104\n4\nNitrite2\n6,000-11,999\n104\n208\n5\nResidual disinfectant\n≥ 12,000\n104\n365\n6\nTurbidity\nSubject to check monitoring\n7\nClostridium perfringens1\n<20\n-\n2\n8\nConductivity\n20-999\n2\n4\n1,000-1,999\n6\n12\n2,000-5,999\n12\n24\n6,000-9,999\n18\n36\n10,000-15,999\n26\n52\n16,000-32,999\n52\n104\n33,000-49,999\n78\n156\n50,000-67,999\n104\n208\n68,000-84,999\n130\n260\n85,000-101,999\n156\n312\n102,000-119,999\n183\n365\n120,000-241,999\n365\n730\n242,000-484,999\n730\n1,460\n485,000-728,999\n1,095\n2,190\n8A\nIndicative Dose (for radioactivity)\n<20\n1\n8B\nGross alpha5\n20-999\n4\n8C\nGross beta5\n1,000-49,999\n8\n8D\nRadon\n50,000-89,999\n12\n8E\nTritium\n90,000-299,999\n24\n300,000-649,999\n36\n≥ 650,000\n48\nSubject to audit monitoring\n9\nBenzene\n<20\n1\n10\nBoron\n20-999\n4\n11\nBromate4\n1,000-49,999\n8\n11A\nClostridium perfringens (including spores)\n50,000-89,999\n12\n12\nCyanide\n90,000-299,999\n24\n13\n1,2,dichloroethane\n300,000-649,999\n36\n14\nFluoride\n≥ 650,000\n48\n15\nMercury\n16\nNitrite3\n17\nPesticides and related products\n18\nTrichloroethene/\nTetrachloroethene\n19\nTetrachloromethane\n20\nChloride\n21\nSulphate\n22\nTotal Organic Carbon\n22a\nRadon\n23\nTritium\n24\nIndicative Dose (for radioactivity)\n25\nGross alpha5\n26\nGross beta5\n”",
  "extent": null,
  "status": "repealed",
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Regulations revoked (27.10.2017) by The Water Supply (Water Quality) Regulations (Northern Ireland) 2017 (S.R. 2017/212), reg. 1, Sch. 6"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2015/363/schedule/2",
    "retrieved_at": "2026-10-29T00:59:53.081145+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."
}