Figure 2: Auckland TSP seven-day average 1994–2006
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The Penrose site has shown a downward trend over this period. The MOH guideline was exceeded in June 1996 and June 1999. There is less of a noticeable trend in the Mt Eden data. The Kowhai data from June 2004 shows similar levels.
Ministry of Health guideline = 60 µg/m3.
