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Compliance with national environmental standards

The year 2008 was the first that there were no breaches of the national standards for carbon monoxide, nitrogen dioxide, sulphur dioxide and ozone at any monitoring sites in New Zealand since the standards were introduced in 2004 (figures 13–15). Therefore, the national environmental standards were met for each of these pollutants.

However, there were five exceedances (but no breaches) of the 1-hour national standard for sulphur dioxide in 2008.

Figures 13-16: Compliance with national environmental standards

Figures 13-15: Compliance with national environmental standardsFigures 13-15: Compliance with national environmental standards


Figures 13-15: Compliance with national environmental standardsFigures 13-15: Compliance with national environmental standards

Figures: Top left - Figure 13: Total breaches and exceedances for the four pollutants, 2005–2008; Top right - Figure 14: Carbon monoxide breaches and exceedances, 2005–2008; Bottom left - Figure 15: Nitrogen dioxide breaches and exceedances, 2005–2008; Bottom right - Figure 16: Sulphur dioxide breaches and exceedances, 2005–2008

Source: Northland Regional Council,17 Auckland Regional Council,9 Environment Waikato,14 Environment Bay of Plenty,11 Hawkes Bay Regional Council,8 Greater Wellington,12 Environment Canterbury.10

Notes:

(1) Between 2005 and 2008, monitoring ceased at seven sites. The recorded levels of pollutants at each of these sites before ceasing had never exceeded the standard. Monitoring began at 20 new sites during this period.
(2) Ozone is not presented as there were no exceedances or breaches of this pollutant between 2005 and 2008.

Figure 13: Total breaches and exceedances for the four pollutants, 2005–2008
Year Number of exceedances Number of breaches
2005 16 6
2006 15 14
2007 11 2
2008 5 0
Figure 14: Carbon monoxide breaches and exceedances, 2005–2008
Year Number of exceedances Number of breaches
2005 0 0
2006 2 4
2007 0 0
2008 0 0
Figure 15: Nitrogen dioxide breaches and exceedances, 2005–2008
Year Number of exceedances Number of breaches
2005 13 6
2006 1 0
2007 9 2
2008 0 0
Figure 16: Sulphur dioxide breaches and exceedances, 2005–2008
Year Number of exceedances Number of breaches
2005 3 0
2006 12 10
2007 2 0
2008 5 0