76 



CM 



o 



CO 



1981 1982 1983 1984 1986 1986 1987 1988 1989 1990 1991 



Figure 9.1 Maximum Daily SOj Air Quality Data, Coronach Water Treatment Plant, 

 1981 to 1991, (Saskatchewan 24-hour standard). 



1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 



Figure 9.2 Maximum Hourly SO2 Air Quality Data, Coronach Water Treatment Plant, 

 1981 to 1991, (Saskatchewan 1-hour standard). 



