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Abstractions from non-tidal surface water and groundwater by use: 1971-2007
Abstractions from non-tidal surface water and groundwater by use: 1971-2007 -
Biological water quality of rivers and canals : 1990, 1995, 2000, 2001 and 2...
Biological water quality of rivers and canals : 1990, 1995, 2000, 2001 and 2002 - 2006 -
Chemical quality of rivers and canals: 1990, 1995, 2000 - 2006
Chemical quality of rivers and canals: 1990, 1995, 2000 - 2006 -
Chemical water quality (by distance): 1990-2006
Chemical water quality (by distance): 1990-2006 -
Chemical water quality (by percentage): 1990-2006
Chemical water quality (by percentage): 1990-2006
