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Environmental report card: Air quality (four pollutants)

Publication date:  May 2010
Publication reference number:  INFO 497

In 2008, the national environmental standards were met for carbon monoxide, nitrogen dioxide, sulphur dioxide and ozone.

Between 2005 and 2008, there was a general downward (improving) trend in the maximum and annual average levels of carbon monoxide, but mixed trends across monitoring sites for nitrogen dioxide and sulphur dioxide. Ozone levels have remained low during this period.

The year 2008 was the first year that there were no breaches of the national environmental standards for carbon monoxide, nitrogen dioxide, sulphur dioxide and ozone at any monitoring sites in New Zealand since the standards were introduced in 2004 (six breaches occurred in 2005, 14 in 2006 and two in 2007).