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Urban Air Quality Trends
> Data Summary
Air Quality Trends - Data Summary
Year
TSP
CO 8H
SO
2
NO
2
O
3
1H
Lead
1974
112
47
56
(*)
(*)
100
1975
94
43
47
N/A
(*)
81
1976
94
34
52
N/A
(*)
72
1977
88
34
47
58
(*)
68
1978
88
32
43
55
(*)
62
1979
94
35
43
49
109
57
1980
96
32
39
47
105
50
1981
84
35
35
43
102
47
1982
74
32
35
43
99
40
1983
66
27
30
45
98
34
1985
61
26
26
42
93
26
1986
61
26
26
42
90
24
1987
68
24
22
40
90
15
1988
62
22
26
40
113
9
1989
62
21
27
42
98
7
1990
63
19
27
39
90
3
1991
55
18
20
38
86
3
1992
50
15
22
34
73
3
(*) Not monitored
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Last updated: 2013-05-24
Last reviewed: 2013-05-24
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