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TABLES  
 
Statistical overview | Power stations capacities    
 
Environmental implications of using/saving one kilowatt-hour of electricity  
 
Transmission and distribution equipment in service | Sale of electricity and revenue per category of customer  
   
 
Environmental implications of using or saving
one kilowatt-hour of electricity1
 
   
 
        If electricity consumption is measured in:      
    Factor2   kWh   MWh   GWh   TWh  
Coal use   0,56   kilogram   ton   thousand tons (kt)   million tons  
Water use3   1,44   litre   kilolitre   megalitre   thousand megalitres  
Ash produced   161   gram   kilogram   ton   thousand tons (kt)  
Particulate emissions   0,23   gram   kilogram   ton   thousand tons (kt)  
CO2 emissions4   1,005   kilogram   ton   thousand tons (kt)   million tons  
SOx emissions4   8,69   gram   kilogram   ton   thousand tons (kt)  
NOx emissions4   4,39   gram   kilogram   ton   thousand tons (kt)  
Use of table: Multiply electricity consumption or saving by the relevant factor to determine the environmental implication.
Example 1: Used 90kWh of electricity
Water consumption: 90 x 1,44 = 129,60
Therefore 129,60 litres of water used
Example 2: Used 90GWh of electricity
CO2 emissions 90 x 1,00 = 90,00
Therefore 90,00 thousand tons emitted
 
1 Figures are calculated based on total energy sold by Eskom. Further information can be obtained through the Eskom environmental helpline. Contact details appear on back cover.
2 Figures represent the 12-month period from 1 April 2007 to 31 March 2008.
3 Volume of water consumed per unit of generated power sent out, excluding rain and mine water used.
4 Calculated annual figures based on coal characteristics and power station design parameters, excluding the gas turbine power stations.  
5 Represents the Eskom average CO2 figure. We have calculated the carbon emission factor to be 1,2kg/kWh in accordance with the clean development mechanism (CDM) approved consolidated methodology 0002. The methodology can be found on the official CDM website (http://cdm.unfccc.int).
   
 
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