{
  "url": "https://openlegislation.uk/private-water-supplies-regulations-northern-ireland-2017/schedule-1/part-1",
  "json_url": "https://openlegislation.uk/private-water-supplies-regulations-northern-ireland-2017/schedule-1/part-1.json",
  "legislation": "nisr/2017/211",
  "legislation_title": "The Private Water Supplies Regulations (Northern Ireland) 2017",
  "legislation_url": "https://openlegislation.uk/private-water-supplies-regulations-northern-ireland-2017",
  "path": "schedule/1/part/1",
  "kind": "part",
  "number": "1",
  "heading": "Wholesomeness",
  "text": "TABLE A\nMICROBIOLOGICAL PARAMETERS\nPrescribed concentrations and values\nParameter\nParametric value (number/volume)\nEnterococci\n0/100 ml\nEscherichia coli (E.Coli)\n0/100 ml\nTABLE B\nCHEMICAL PARAMETERS\nPrescribed concentrations and values Part I: Directive requirements -Prescribed concentrations and values\n1 The parametric value refers to the residual monomer concentration in the water as calculated according to specifications of the maximum release from the corresponding polymer in contact with the water. This is controlled by product specification.\n2 Where possible, without compromising disinfection, a relevant person (in relation to a supply of water for human consumption purposes) must strive for a lower value.\n3 See also the nitrate-nitrite formula in regulation 5(c).\n4 The additional parametric value of 0.10 mg/l applies only if the water is subject to treatment to improve its quality. The point of compliance for this additional parametric value is the point at which the water flows out from the treatment works.\n5 “Pesticide” means an organic insecticide, organic herbicide, organic fungicide, organic nematocide, organic acaricide, organic algicide, organic rodenticide, organic slimicide, a related product (including inter alia, growth regulator) and any relevant metabolite, degradation or reaction product. Only those pesticides which are likely to be present in a supply of water need to be monitored.\n6 “Other pesticide” means a pesticide other than aldrin, dieldrin, heptachlor and heptachlor epoxide. The parametric value applies to each “other pesticide” individually.\n7 The parametric value for this parameter is the sum of all individual pesticides detected and quantified in the monitoring procedure.\n8 The parametric value for this parameter is the sum of the concentrations of benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(ghi)perylene and indeno(1,2,3-cd)pyrene.\n9 The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.\n10 The specified compounds are chloroform, bromoform, dibromochloromethane, bromodichloromethane and the parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.\nParameter\nParametric value\nUnit\nAcrylamide1\n0.10\nμg/l\nAntimony\n5.0\nμg/l\nArsenic\n10\nμg/l\nBenzene\n1.0\nμg/l\nBenzo(a)pyrene\n0.010\nμg/l\nBoron\n1.0\nmg/l\nBromate2\n10\nμg/l\nCadmium\n5.0\nμg/l\nChromium\n50\nμg/l\nCopper\n2.0\nmg/l\nCyanide\n50\nμg/l\n1,2-dichloroethane\n3.0\nμg/l\nEpichlorohydrin1\n0.10\nμg/l\nFluoride\n1.5\nmg/l\nLead\n10\nμg/l\nMercury\n1.0\nμg/l\nNickel\n20\nμg/l\nNitrate3\n50\nmg/l\nNitrite34\n0.50\nmg/l\n0.104\nmg/l\nPesticides56 —\nAldrin\n0.030\nμg/l\nDieldrin\n0.030\nμg/l\nHeptachlor\n0.030\nμg/l\nHeptachlor epoxide\n0.030\nμg/l\nOther pesticide\n0.10\nμg/l\nPesticides: total57\n0.50\nμg/l\nPolycyclic aromatic hydrocarbons8\n0.10\nμg/l\nSelenium\n10\nμg/l\nTetrachloroethene and trichloroethene9\n10\nμg/l\nTrihalomethanes: total910\n100\nμg/l\nVinyl chloride1\n0.50\nμg/l\nPart II: National Requirements\nAluminium\n200\nμg/l\nColour\n20\nmg/l Pt/Co\nIron\n200\nμg/l\nManganese\n50\nμg/l\nOdour\nAcceptable to consumers and no abnormal change\nSodium\n200\nmg/l\nTaste\nAcceptable to consumers and no abnormal change\nTetrachloromethane\n3\nμg/l\nTurbidity\n4\nNTU",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2017/211/schedule/1/part/1",
    "retrieved_at": "2026-10-29T00:51:01.602850+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."
}