- 32 - 



Table 3. — Recommended water quality objectives and excursions, 

 1981-90 monitoring, East Poplar River at the International Boundary 



[units in mg/L except as otherwise noted] 



Parameter 



No. of samples 



Objective 



USA 



Canada 



Excursions 

 (No. /Year) 



Objectives recommended by IJC to Governments 



Boron-total 



Total dissolved solids 



3.5/2.5(') 113 134 

 1,500/1, 000 < l ) 113 133 



nil 

 nil 



Objectives recommended by Poplar River Board to IJC 



Aluminum-dissolved 



Ammonia un-ionized (as N) 



Cadmium- total 



Chromium- total 



Copper -dissolved 



Copper-total 



Fluoride-dissolved 



Lead-total 



Mercury-dissolved 



Mercury-whole fish (mg/kg) 



Nitrate (as N) 



Oxygen -dissolved 



Sodium adsorption ratio 



Sulf ate-dissolved 



Zinc-total 



Water temperature (Celsius) 



pH (pH units) 



Coliform 

 Fecal (no. per 100 mL) 

 Total (no. per 100 mL) 



'Five-year average of flow-weighted concentrations (March to October) should 

 be <2 . 5 boron and <1,000 TDS . Three-month average of flow-weighted 

 concentrations should be <3.5 boron and <1, 500 TDS. 



2 Mercury sampled by Environment Canada as total mercury. 



3 5.0 (minimum April 10 to May 15), 4.0 (minimum remainder of year). 



4 Natural temperature (April 10 to May 15), <30 degrees Celsius (remainder of 

 year) . 



Less than . 5 pH units above natural, minimum pH = 6.5. 



