{
  "url": "https://openlegislation.uk/private-water-supplies-regulations-1991/schedule-4/part-II",
  "json_url": "https://openlegislation.uk/private-water-supplies-regulations-1991/schedule-4/part-II.json",
  "legislation": "uksi/1991/2790",
  "legislation_title": "The Private Water Supplies Regulations 1991",
  "legislation_url": "https://openlegislation.uk/private-water-supplies-regulations-1991",
  "path": "schedule/4/part/II",
  "kind": "part",
  "number": "II",
  "heading": "PARAMETERS",
  "text": "Basic parameters\nAdditional Parameters\n(1)\n(2)\nNotes:\n(1) Samples need not be analysed for lead if the local authority are satisfied that lead pipework or solder is not present in the plumbing of the property or that naturally occurring lead is not present in the water.\n(2) Samples need not be analysed for nitrate if the local authority are satisfied that nitrate levels in the locality concerned are below 25 mg NO3/l.\n(3) Samples should not be assessed qualitatively for taste if the person taking the samples has any reason to suspect that the water may give rise to a health hazard.\n(4) The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluoranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3-cd) pyrene.\nHydrogen ion\nOdour (quantitative)\nZinc\nFluoride\nConductivity\nTaste (quantitative)\nPolycyclic aromatic hydrocarbons(4)\nBarium\nTotal coliforms\nTemperature\nSilver\nFaecal coliforms\nNitric\nChloride\nArsenic\nLead (1)\nAmmonium\nSulphate\nCadmium\nNitrate(2)\nIron\nCalcium\nCyanide\nOdour (qualitative)\nAluminium\nMagnesium\nChromium\nTaste (qualitative)(3)\nManganese\nSodium\nMercury\nTurbidity\nColour\nPotassium\nNickel\nTrihalomethanes\nDry residues\nAntimony\nTetrachloromethane\nOxidazability (permanent value)\nSelenium\nTrichloroethene\nTotal hardness\nTetrachloroethene\nTotl organic carbon\nAlkalinity\nCopper\nBoron\nResidual disinfectant\nSurfaciants\nColony counts\nPhosphorus",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1991/2790/schedule/4/part/II",
    "retrieved_at": "2026-10-29T14:32:48.534038+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."
}