{
  "url": "https://openlegislation.uk/water-framework-directive-classification-priority-substances-and-shellfish-waters-regulations-northern-ireland-2015/schedule-5/part-1",
  "json_url": "https://openlegislation.uk/water-framework-directive-classification-priority-substances-and-shellfish-waters-regulations-northern-ireland-2015/schedule-5/part-1.json",
  "legislation": "nisr/2015/351",
  "legislation_title": "The Water Framework Directive (Classification, Priority Substances and Shellfish Waters) Regulations (Northern Ireland) 2015",
  "legislation_url": "https://openlegislation.uk/water-framework-directive-classification-priority-substances-and-shellfish-waters-regulations-northern-ireland-2015",
  "path": "schedule/5/part/1",
  "kind": "part",
  "number": "1",
  "heading": "Shellfish Waters Standards",
  "text": "Table 1\nShellfish Water Mandatory Standards\nParameter\nUnits\nStandard\nTemperature\n◦C\nA discharge affecting shellfish waters must not cause the temperature of the water to exceed by more than 2◦C the temperature of the waters not so affected.\npH\npH values will not reach levels outside of the range established so as to ensure the functioning of the ecosystem and the achievement of the values specified for the biological quality elements under Good Ecological Status\nSilver\nAnnual mean (AA-EQS) (µg/l)\n0.5\nMaximum allowable concentration (MAC-EQS) (µg/l)\n1\nSalinity\nPractical Salinity Units (PSU)\n≤\nA discharge affecting shellfish waters must not cause their salinity to exceed by more than 10% the salinity of waters not so affected.\nTable 2\nShellfish Water Salinity Guideline Standard\nParameter\nUnits\nStandard\nSalinity\nPSU\n12-38",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2015/351/schedule/5/part/1",
    "retrieved_at": "2026-10-29T01:00:03.181368+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."
}