Figure 2.6: Percentage of measured one-hour and eight-hour average CO concentrations within air quality categories at Henderson and Dominion Road, Auckland
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Text description of figure
There are two charts measuring CO concentrations at Dominion Road and Henderson, Auckland, from 1995 to 2001 (with no measurements made in 1997).
The first chart shows one-hour concentrations of CO (measured by air quality categories). Air qualities have improved marginally throughout the period, which the majority of the measured concentrations being in the “Excellent” category.
The second chart shows eight-hour concentrations of CO (measured by air quality categories). Air qualities have increased over the period, the most significant improvement being from 1995 to 1996.
