Figure 2.21: Percentage of measured one-hour and eight-hour average CO concentrations within air quality categories in Rangiora, Ashburton and Kaiapoi
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There are six charts measuring CO concentrations in various locations in Canterbury.
The first two charts show the one-hour and 8-hour concentrations of CO in Rangiora from 1999 to 2000. There was little variation for the two years, with almost all readings being “Excellent”.
The second two charts show the one-hour and 8-hour concentrations of CO in Kaiapoi in 2001. Concentrations were mostly “Excellent”.
The final two charts show the one-hour and 8-hour concentrations of CO in Ashburton in 1999 and 2000. There was little variation for the two years, with almost all readings being “Excellent”.
