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  • Boundary High Water Mark

    Publisher
    Ordnance Survey
    Updated
    10 January 2025
    In the OS NGD Boundaries Collection, the mean high water (springs) mark is shown to the normal tidal limit (NTL). Areas of salt marsh, mudflats and so on often have extremely complicated tide...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    27 July 2024
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    21 July 2025
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    17 September 2026
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    15 August 2022
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    1 May 2021
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    21 March 2022
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    4 December 2021
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    20 December 2021
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    7 August 2021
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Surface Drinking Water Protected Areas

    Publisher
    OpenDataNI
    Updated
    11 December 2021
    The European Water Framework Directive was transposed to national legislation through the Water Environment (Water Framework Directive) Regulations (Northern Ireland) 2017. The Water (Amendment)...
  • Historic GQA Headline Indicators of Water Courses - Nutrients - phosphate GQA grades 2009 (England)

    Publisher
    Environment Agency
    Updated
    18 September 2026
    GQA Headline Indicators of Water Courses - Nutrients - phosphate GQA grades 2009 (England)'. The General Quality Assessment Headline Indicator scheme (GQAHI) was the Environment Agency's national...
  • Historic GQA Headline Indicators of Water Courses - Nutrients - phosphate GQA grades 2010 (Wales)

    Publisher
    Environment Agency
    Updated
    18 September 2026
    This record is for Approval for Access product AfA163.4 'Historic GQA Headline Indicators of Water Courses - Nutrients - phosphate GQA grades 2010 (Wales)'. The General Quality Assessment Headline...
  • Historic GQA Headline Indicators of Water Courses - Nutrients - NITRATE GQA GRADES 2009 (ENGLAND)

    Publisher
    Environment Agency
    Updated
    18 September 2026
    This record is for Approval for Access product AfA163.1 'Historic GQA Headline Indicators of Water Courses - Nutrients - nitrate GQA grades 2009 (England)'. The General Quality Assessment Headline...
  • Historic GQA Headline Indicators of Water Courses - Nutrients - nitrate GQA grades 2010 (Wales)

    Publisher
    Environment Agency
    Updated
    18 September 2026
    This record is for Approval for Access product AfA163.2 'Historic GQA Headline Indicators of Water Courses - Nutrients - nitrate GQA grades 2010 (Wales)'. The General Quality Assessment Headline...
  • Forestry England Water Courses

    Publisher
    Forestry Commission
    Updated
    20 February 2026
    This dataset shows captured water courses within the Nations Forests. These will be natural water courses which will usually be permanent. Attribution statement: © Forestry Commission copyright...
  • Water Body Measures Welland

    Publisher
    Environment Agency
    Updated
    6 August 2026
    PLEASE NOTE: This dataset has been retired and superseded by the following record: https://environment.data.gov.uk/dataset/839e02a8-aa89-4cfe-99b0-bc18793b9b31. Water body measures are the actions...
  • Water Body Measures Teme

    Publisher
    Environment Agency
    Updated
    6 August 2026
    PLEASE NOTE: This dataset has been retired and superseded by the following record: https://environment.data.gov.uk/dataset/839e02a8-aa89-4cfe-99b0-bc18793b9b31. Water body measures are the actions...
  • Water Body Measures Witham

    Publisher
    Environment Agency
    Updated
    6 August 2026
    PLEASE NOTE: This dataset has been retired and superseded by the following record: https://environment.data.gov.uk/dataset/839e02a8-aa89-4cfe-99b0-bc18793b9b31. Water body measures are the actions...
  • Water Body Measures Tamar

    Publisher
    Environment Agency
    Updated
    6 August 2026
    PLEASE NOTE: This dataset has been retired and superseded by the following record: https://environment.data.gov.uk/dataset/839e02a8-aa89-4cfe-99b0-bc18793b9b31. Water body measures are the actions...