- 34 - 



2.4 



2.2 





2.0 



C 



O 1.8 

 U 

 O 

 CQ 

 1.6 



1.4 



• • • • 



. • ... 



1990 



J J 



Month 



1991 



Figure 26. — Boron concentrations for 1990 grab samples from 

 East Poplar River at International Boundary. 



Other Water Quality Variables 



Table 4 compares the concentration values for the remaining water quality 

 variables to the multipurpose water quality objectives recommended by the 

 International Poplar River Water Quality Board to the IJC. In 1990, 

 there were no exceedences of these objectives. 



Environment Canada monitored the East Poplar River for phenoxyacid 

 herbicides and organochlorine compounds during 1990. Trace 

 concentrations of 2,4-D (in one of eight samples), and alpha BHC (in one 

 of nine samples) were recorded. The presence of these compounds in 

 prairie surface waters is well documented (Integrated Environments 

 Limited, 1991) . All other organic compounds monitored were below 

 analytical detection limits. 



