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How much do we pay to get rid of our waste? This FACT indicates the water and sewerage consumer price index for each Australian city. In other words, this index indicates the price paid for this utility, using the 2011-12 index of 100 as a base. The Australian average for water and sewerage consumer price index in March 2013 was 103.2, meaning that populations in the majority of Australian capital cities were paying above the average.