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Note:
µg/m3 = micrograms per cubic metre.
Data source: Auckland Regional Council, 2006a.
Year |
Average (µg/m3) |
|---|---|
1964 |
72 |
1965 |
70 |
1966 |
63 |
1967 |
73 |
1968 |
67 |
1969 |
76 |
1970 |
81 |
1971 |
55 |
1972 |
61 |
1973 |
66 |
1974 |
60 |
1975 |
56 |
1976 |
53 |
1977 |
57 |
1978 |
49 |
1979 |
45 |
1980 |
52 |
1981 |
47 |
1982 |
55 |
1983 |
45 |
1984 |
37 |
1985 |
38 |
1986 |
41 |
1987 |
35 |
1988 |
32 |
1989 |
34 |
1990 |
29 |
1991 |
26 |
1992 |
26 |
1993 |
28 |
1994 |
30 |
1995 |
32 |
1996 |
33 |
1997 |
30 |
1998 |
32 |
1999 |
30 |
2000 |
29 |
2001 |
25 |
2002 |
25 |
2003 |
26 |
2004 |
21 |
2005 |
19 |