 |
Number of days ground-level ozone exceeded objective1
| |
Number of days exceeded |
| Year |
Canada |
Atlantic Canada |
Lower Mainland of British Columbia |
Prairies |
Windsor - Quebec City Corridor |
| 1980 |
5.4 |
2.0 |
4.2 |
0.7 |
8.0 |
| 1981 |
6.3 |
– |
9.3 |
2.3 |
7.6 |
| 1982 |
3.6 |
4.0 |
3.0 |
1.7 |
4.5 |
| 1983 |
6.9 |
x |
2.5 |
0.4 |
9.6 |
| 1984 |
4.1 |
17.0 |
1.2 |
1.8 |
4.8 |
| 1985 |
3.2 |
0.5 |
2.4 |
0.3 |
4.8 |
| 1986 |
3.0 |
– |
1.5 |
0.3 |
4.4 |
| 1987 |
4.2 |
3.0 |
0.4 |
0.4 |
7.1 |
| 1988 |
10.5 |
3.5 |
4.5 |
0.9 |
17.1 |
| 1989 |
4.1 |
3.0 |
0.4 |
0.9 |
6.6 |
| 1990 |
2.9 |
2.0 |
2.8 |
0.6 |
4.0 |
| 1991 |
5.1 |
5.5 |
– |
0.5 |
8.2 |
| 1992 |
1.4 |
0.5 |
– |
– |
2.3 |
| 1993 |
1.2 |
0.3 |
0.0 |
0.1 |
2.1 |
| 1994 |
2.2 |
1.0 |
0.5 |
0.6 |
3.3 |
| 1995 |
3.0 |
– |
– |
0.3 |
5.6 |
| 1996 |
1.6 |
– |
– |
0.1 |
2.9 |
| x Data unavailable not applicable or confidential. |
| – Nil or Zero. |
| 1. The national maximum acceptable objective is 82 parts per billion for one-hour average levels for at least one-hour during the day from May to September. |
| Source: Environment Canada, Environmental Technology Centre. |
| Last modified: June 8, 2001. |
If you have any questions or would like to obtain more information,
contact infostats@statcan.ca.
|
