- 83 - 



E 



Q. 



a. 



O 

 W 



1984 1985 



YEARS 



1987 1988 1989 1990 



Figure 63. — Saskatchewan maximum hourly sulphur dioxide air quality 

 data during 1989-90, Coronach water treatment plant. 



E 

 a 

 a. 



c\j 

 O 

 £0 



1)07 



1930 nisi 1082 m: 



D84 K)3 r i 



YEARS 



.000 

 086 1987 1938 1989 1990 



Figure 64. — Saskatchewan maximum daily sulphur dioxide air quality 

 data during 1980-1990, Coronach water treatment plant. 



