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  • Water Framework Directive (WFD) Transitional Waterbodies Cycle 1

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Water Framework Directive (WFD) Transitional (Estuarine) Waterbodies Cycle 1 (2008-2013) is a polygon dataset containing attributes that have been collated as defined for the implementation of the...
  • Nitrate Vulnerable Zones (NVZ)

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Nitrate Vulnerable Zones (NVZs) were areas within Wales that contain surface water or groundwater that is susceptible to nitrate pollution from agricultural activities. They were designated in...
  • Working with Natural Processes (WWNP) in Wales: Woodland Constraints

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    This dataset comprises a range of land cover types where the woodland potential layers have been masked, owing to existing woodland, watercourses, peat, roads, rail and urban areas. Other...
  • KiEco Freshwater Ecology: Fish Monitoring Data - Geospatial

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Freshwater fish are used as an indicator of stock status, water and habitat quality, artificial obstacles to migration and river flow requirements due to specific life-cycle requirements. This...
  • Surface Water Temperature Archive up to 2007

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Water temperature data is collected for different reasons and in different locations. Time series of surface water temperatures can provide indicators of climate change and associated ecological...
  • KiEco Marine Phytoplankton - Geospatial

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    This data collates all the Phytoplankton samples collected within Wales from 2007 onwards by Natural Resources Wales and former Environment Agency Wales that are held within NRWs KiEco Database....
  • KiEco Freshwater Ecology: Diatoms - Geospatial

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Freshwater diatoms (phytobenthos) are free-living microscopic plants that form a biofilm on submerged substrates such as rock/stone or large plants. They are used as an indicator of water quality...
  • The Wales Outdoor Recreation Survey

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    The Welsh Outdoor Recreation Survey (WORS) provides information on participation in a wide range of outdoor activities, from climbing to picnics, which take place in all areas from local parks to...
  • NH3 Sensitive Ancient Woodlands

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    This layer identifies areas of Ancient Woodland and Parkland from which NRW hold recent, auditable records of N-sensitive lichens. Not all lichens are sensitive to increased ammonia: the 62...
  • Urban Tree Cover 2013

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    This spatial dataset relates to Phase 3 (2013) and consists of 3 individual layers, being Points (individual trees), polygons (groups of trees) and urban extents (the extent of the study areas)....
  • Kieco Marine Fish - Geospatial

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Marine fish are used as an indicator of stock status, water and habitat quality. This dataset is made up of the species count and length values from the fish surveys conducted across Wales marine...
  • Historic River Quality Objectives

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    The River Quality Objectives (RQO) classification was used for planning water quality improvements until 2006 when the scheme ended. The national RQO classification scheme ceased at the end of...
  • Marine Licences

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    The records contain coordinate data associated with current marine licence applications in Wales. The location of disposal sites is also available. This data allows the locations of licence...
  • Marine Licence Archive

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    The records contain coordinate data associated with historic and expired marine licence applications in Wales. The data allows the location of applications to be mapped to assess any in...
  • UK Water Quality Sampling Harmonised Monitoring Scheme Detailed Data

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    The Historic UK Water Quality Sampling Harmonised Monitoring Scheme (HMS) dataset contains individual determinand results for all sites in the UK Harmonised Monitoring Scheme network from 1974...
  • Working with Natural Processes (WWNP) in Wales: Wider Catchment Woodland Potential

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Working with Natural Processes (WWNP) Wider Catchment Woodland Potential is our best estimate of locations where there are slowly permeable soils, where scrub and tree planting may be most...
  • Historic General Quality Assessment (GQA) Headline Indicators of Water Courses

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    The General Quality Assessment (GQA) Headline Indicator scheme or GQAHI (previously known as GQA) was the national indicator for water quality in rivers and canals. It was designed to provide an...
  • Working with Natural Processes (WWNP) in Wales: Floodplain Reconnection Potential

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Working with Natural Processes (WWNP) Floodplain Reconnection Potential is our best estimate of locations where it may be possible to establish reconnection between a watercourse and its natural...
  • KiEco Freshwater Ecology: Lake Macroinvertebrates - Geospatial

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    Freshwater macroinvertebrates are used as an indicator of water quality and Lake flow requirements due to the relative immobility and abundance. This dataset contains site, sample, metric and taxa...
  • Water Framework Directive (WFD) River Waterbodies Cycle 2

    Publisher
    Natural Resources Wales
    Updated
    17 September 2026
    The Water Framework Directive (WFD) River Waterbodies Cycle 2 are a spatial (polygon) dataset collated as defined for the implementation of the Water Framework Directive. 'WFD River Waterbodies...