Figure 2.17: Percentage of measured one-hour and eight-hour average CO concentrations within air quality categories at Packe Street and Coles Place, Christchurch
Return to the point in the document where this figure is located.
Text description of figure
There are four charts measuring CO concentrations in Christchurch.
The first two charts measure one-hour and 8-hour CO concentrations at Packe St, Christchurch, from 1992 to 2001. One-hour measurements have been consistently “Excellent” over the period. The 8-hour concentrations have improved considerably over the period, with the majority of measurements changing from “Good” to “Excellent”.
The final two charts measure one-hour and 8-hour CO concentrations at Coles Place, Christchurch from 1998 to 2001. One-hour measurements were consistently "Excellent" over the period. 8-hour concentrations were also predominantly excellent, although there was a slight increase in concentrations over the period.
