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Table 4. Recommended Water Quality Objectives and Excursions, 1988 

 Sampling Program, East Poplar River at the International 

 Boundary (units in mg/L except as otherwise noted) 



Parameter 



Objective 



No. of samples 

 USA Canada 



Excursions 



Objectives recommended by IJC to Governments 



Boron - total 



Total dissolved solids 



3.5, 2.5 (1) 14 

 1500, 1000 (1) 14 



14 

 14 



nil 

 nil 



Objectives recommended by Board to IJC 



1. Five-year average of flow-weighted concentrations (March to 

 October) should be <2.5 mg/L boron and <1,000 mg/L TDS . Three- 

 month average of flow-weighted concentrations should be <3.5 

 mg/L boron and <1,500 mg/L TDS. 



2. 5.0 mg/L (minimum April 10 to May 15), 4.0 mg/L (minimum remainder 

 of year). 



3. Natural temperature (April 10 to May 15), <30 degrees Celsius 

 (remainder of year). 



4. Less than 0.5 pH units above natural, minimum pH = 6.5. 



5. USGS result July 15, 1988 (3.6 mg/L). Environment Canada result 

 July 6, 1988 (7.5 mg/L). 



