Figure 4.6: Percentage of measured one-hour and 24-hour average SO2 concentrations within air quality categories in Ashburton, Rangiora and Kaiapoi
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There are six charts showing concentrations of SO2 in Canterbury. The first two charts show one-hour and 24-hour concentrations of SO2 in Ashburton from 1998 to 2000. All measurements were “Excellent”.
The second two charts show one-hour and 24-hour concentrations of SO2 in Rangiora from 1999 to 2000. All measurements were “Excellent”.
The final two charts show one-hour and 24-hour concentrations in Kaiapoi in 2001. All measurements were “Excellent”.
