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Other Water Quality Variables 



Table 4 contains the multi-purpose water quality objectives for the 

 East Poplar River at the International Boundary, recommended by the 

 International Poplar River Water Quality Board to the IJC. No 

 excursions of the multi-purpose objectives occurred in 1987. 



Environment Canada monitored the East Poplar River for phenoxy-acid 

 herbicides and organochlorine compounds during 1987 . Trace 

 concentrations of the phenoxy-acid herebicide, MCPA (in two of 

 twelve samples) and the organochlorine compound, alpha-BHC (in six 

 of twelve samples) were recorded. Traces of these compounds are 

 common in prairie waters, and the concentrations measured are not 

 considered a hazard. All other organic compounds monitored were 

 less than analytical detection. 



Girard Creek and Cookson Reservoir 



Saskatchewan Environment and Public Safety reported quarterly on 

 the water quality at four locations in the Poplar River Basin 

 during 1987. Sites included Girard Creek south of Coronach, 

 Cookson Reservoir at Highway 36 , Cookson Reservoir near Morrison 

 Dam, and East Poplar River immediately below Morrison Dam. 

 Sampling at these sites was carried out in February, May, August 

 and November. 



A review of the data from these locations showed concentrations of 

 all water quality variables to be within the recommended water 

 quality objectives for the East Poplar River (Table 4). 



From 1983 to 1985, the average runoff to Cookson Reservoir was 



6 3 

 4.9 X 10 m , about one-third of the long-term average. The 



low runoffs resulted in a concentrating trend for several analytes. 



