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Biological Oxygen Demand (1980-2011)

River water quality: Annual average concentrations of selected determinands

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Title: Annual Average, highest and lowest mean concentrations of water quality: Biological Oxygen Demand by region - 1980 to 2011
Year: 1980-2011
Geography: Great Britain
Units: mq/litre
Source: EA (Environment Agency), SEPA (Scottish Environment Protection Agency) - The Harmonised Monitoring Scheme