{
  "url": "https://openlegislation.uk/private-water-supplies-regulations-northern-ireland-2017/schedule-4/paragraph-2",
  "json_url": "https://openlegislation.uk/private-water-supplies-regulations-northern-ireland-2017/schedule-4/paragraph-2.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/4/paragraph/2",
  "kind": "paragraph",
  "number": "2",
  "heading": "Analysing samples",
  "text": "(1) The Department must ensure each sample is analysed in accordance with this paragraph and that analysis methods used are validated and documented in accordance with EN ISO/IEC 17025 or other equivalent standards accepted at an international level.\n(2) For each parameter specified in the first column of Table A in Part 2 of this Schedule “Table A” the method of analysis is specified in the second column of that table.\n(3) For each parameter specified in the first column of Table B in Part 2 of this Schedule “Table B” the method of analysis must be capable of measuring concentrations equal to the parametric value with a limit of quantification of 30% or less of the relevant parametric value set in Schedule 1 and an uncertainty of measurement as specified in Table B.\n(4) The Department must not use the uncertainty of measurement in Table B as an additional tolerance to the parametric values set in Schedule 1.\n(5) For hydrogen ion, a method of analysis which is capable at the time of use of measuring a value with a trueness of 0.2 pH unit and a precision of 0.2 pH unit.\n(6) The result of analysis of parameters under this regulation must be expressed using at least the same number of significant figures as for the associated parametric values in Part 1 of Schedule 1.\n(7) For these purposes—\n“limit of quantification” is to be calculated using an appropriate standard or sample, and may be obtained from the lowest calibration point on the calibration curve, excluding the blank; and\n“measurement uncertainty” shall be estimated at the level of the parametric value, unless otherwise specified.",
  "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/4/paragraph/2",
    "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."
}