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1. Concentration of Biochemical Oxygen Demand (BOD) in Rivers, Lakes and Groundwater [geodata_1824]
BOD, Biological Oxygen Demand, gives an indication of the amount of organic matter present in water bodies. A certain amount of BOD is always present in water bodies, usually around 2 mg/l O2, while ...


2. Global Water Quality Data and Statistics (GEMStat) from UNEP Global Environmental Monitoring System (GEMS) Water Programme [UNEP_GEMSTAT]
The United Nations Environment Programme Global Environment Monitoring System (GEMS) Water Programme is a multi-faceted water science centre oriented towards building knowledge on inland quality issues ...


3. Water Quality for Major Watersheds [geodata_1512]
The data are presented by watershed (drainage basin). The 82 watersheds represent major world rivers, or smaller rivers that have regional significance. Water quality data are strongly site dependant, ...


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