{
  "url": "https://openlegislation.uk/public-water-supplies-scotland-regulations-2014/schedule-1A/paragraph-3n5",
  "json_url": "https://openlegislation.uk/public-water-supplies-scotland-regulations-2014/schedule-1A/paragraph-3n5.json",
  "legislation": "ssi/2014/364",
  "legislation_title": "The Public Water Supplies (Scotland) Regulations 2014",
  "legislation_url": "https://openlegislation.uk/public-water-supplies-scotland-regulations-2014",
  "path": "schedule/1A/paragraph/3n5",
  "kind": "paragraph",
  "number": "3",
  "heading": "Screening for gross alpha activity and gross beta activity",
  "text": "(1) Scottish Water may use screening strategies for gross alpha activity and gross beta activity (or, where appropriate, residual beta activity after subtraction of the potassium-40 activity) to monitor the water for indicative dose.\n(2) Subject to sub-paragraph (3), screening levels must be set at—\n(a) 0.1 Bq/l for gross alpha activity; and\n(b) 1.0 Bq/l for gross beta activity.\n(3) Scottish Water may set alternative levels to those specified in sub-paragraph (2) if it can demonstrate that these will ensure that an indicative dose of 0.1 mSv is not exceeded.\n(4) If the gross alpha activity is less than 0.1 Bq/l and the gross beta activity is less than 1.0 Bq/l, Scottish Water may assume that the indicative dose is less than 0.1 mSv.\n(5) Where sub-paragraph (4) applies, Scottish Water is not required to carry out a radiological investigation unless it is aware—\n(a) that specific radionuclides are present in the water; and\n(b) that these are liable to cause an indicate dose in excess of 0.1 mSv.\n(6) If the gross alpha activity exceeds 0.1 Bq/l or the gross beta activity exceeds 1.0 Bq/l, Scottish Water must carry out an analysis for specific radionuclides.\n(7) Scottish Water must, in deciding which radionuclides require to be measured for the purposes of sub-paragraph (6), take into account all relevant information about likely sources of radioactivity.\n(8) If elevated levels of tritium are detected in a sample, Scottish Water must also measure the gross alpha activity and gross beta activity in that sample.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Sch. 1A inserted (27.10.2017) by The Public Water Supplies (Scotland) Amendment Regulations 2017 (S.S.I. 2017/281), reg. 1(1), sch. 1 (as amended by The Public and Private Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2017 (S.S.I. 2017/321), regs. 1, 3(2))"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ssi/2014/364/schedule/1A/paragraph/3n5",
    "retrieved_at": "2026-10-28T21:32:08.441116+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."
}