Indicator database

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    Freshwater quality

    This indicator shows:

    1. Annual median concentrations in rivers of Biological Oxygen Demand (BOD) and ammonium (NH4).

    2. Trends in concentrations of orthophosphate and nitrate in rivers, total phosphorus and nitrate in lakes, and nitrate in groundwater bodies.

    Units

    The concentration of nitrate is expressed as mg nitrate (NO3)/l for groundwater and mg nitrate-nitrogen (mg NO3-N/l) for rivers and orthophosphate and total phosphorus as mg P/l.

    Water scarcity index

    Water scarcity is the lack of sufficient available water resources to meet the demands of water usage within a region.

    Global Soil Regions

    The indicator shows the distribution of the 12 soil orders according to Soil Taxonomy