Figure 2.8: Percentage of measured one-hour and eight-hour average CO concentrations within air quality categories at Manukau, Auckland
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There are six charts measuring CO concentrations at Manukau, Auckland, from 2000 to 2002.
The first two charts measure one-hour and 8-hour concentrations from September to December, 2000. Concentrations improved over this period (most measurements being “Excellent” and “Good”).
The next two charts measure one-hour and 8-hour concentrations of CO by month for 2001. Concentrations vary greatly from month to month, though most measurements fall between “Excellent” and Good”). Air quality dropped considerably during June and July.
The final two charts measure one-hour and 8-hour concentrations of CO from January to July 2002. Concentrations remained overall “Excellent” and “Good”, although qualities dipped from April to July.
