Comparison of Sulphur Dioxide Levels,
Annual Average ppm
Sudbury, Toronto, and Hamilton

Lowest Value=GREEN Highest Value=RED

Year	Hamilton	Sudbury	Toronto
1970	0.030	0.040	0.070
1971	0.029	0.053	0.052
1972	0.016	0.028	0.030
1973	0.018	0.017	0.014
1974	0.022	0.033	0.012
1975	0.020	0.028	0.015
1976	0.021	0.019	0.015
1977	0.023	0.015	0.014
1978	0.016	0.012	0.011
1979	0.017	0.012	0.008
1980	0.013	0.016	0.007
1981	0.010	0.010	0.008
1982	0.014	0.010	0.006
1983	0.014	0.009	0.004
1984	0.015	0.010	0.006
1985	0.009	0.010	0.004
1986	0.008	0.008	0.004
1987	0.007	0.009	0.004
1988	0.008	0.010	0.007
1989	0.010	0.008	0.008
1990	0.007	0.008	0.006
1991	0.007	0.005	0.005
1992	0.007	0.004	0.008
1993	0.006	0.004	0.007
1994
1995
1996
1997
1998
1999
2000

Last Update: 981026
Name: Dan Bouillon