{
  "url": "https://openlegislation.uk/private-water-supplies-wales-regulations-2017/schedule-4/paragraph-14",
  "json_url": "https://openlegislation.uk/private-water-supplies-wales-regulations-2017/schedule-4/paragraph-14.json",
  "legislation": "wsi/2017/1041",
  "legislation_title": "The Private Water Supplies (Wales) Regulations 2017",
  "legislation_url": "https://openlegislation.uk/private-water-supplies-wales-regulations-2017",
  "path": "schedule/4/paragraph/14",
  "kind": "paragraph",
  "number": "14",
  "heading": null,
  "text": "Where the following formula is satisfied, it can be assumed that the indicative dose is less than the parametric value of 0,1 mSv and no further investigation is required—\nDerived concentrations for radioactivity in water intended for human consumption\nOrigin\nNuclide\nDerived concentration\n(1)This table allows only for the radiological properties of uranium, not for its chemical toxicity.\nNatural\nU-2383\n3,0 Bq/l\nU-2343\n2,8 Bq/l\nRa-226\n0,5 Bq/l\nRa-228\n0,2 Bq/l\nPb-210\n0,2 Bq/l\nPo-210\n0,1 Bq/l\nArtificial\nC-14\n240 Bq/l\nSr-90\n4,9 Bq/l\nPu-239/Pu-240\n0,6 Bq/l\nAm-241\n0,7 Bq/l\nCo-60\n40 Bq/l\nCs-134\n7,2 Bq/l\nCs-137\n11 Bq/l\n1-131\n6,2 Bq/l",
  "extent": "E+W",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 4 para. 14 in force at 20.11.2017, see reg. 1"
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "(1)This table allows only for the radiological properties of uranium, not for its chemical toxicity."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2017/1041/schedule/4/paragraph/14",
    "retrieved_at": "2026-10-28T23:24:57.489600+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."
}