714 



lishment of new or modified specific water quality objectives, this 

 Annex shall be amended in accordance with such recommendation 

 on the receipt by the Commission of a letter from each Party 

 indicating its agreement with the recommendation. 



Annex 2 



control of phosphorus 



1. Programs. Programs shall be developed and implemented to 

 reduce inputs of phosphorus to the Great Lakes System. These pro- 

 grams shall include : 



(a) Construction and operation of waste treatment facilities 

 to remove phosphorus from municipal sewage ; 



(b) Regulatory measures to require industrial dischargers to 

 remove phosphorus from wastes to be discharged into the Great 

 Lakes System ; 



(c) Regulatory and advisory measures to control inputs of 

 phosphorus through reduction of waste discharges attributable 

 to animal husbandry operations. 



In addition, programs may include regulations limiting or elimi- 

 nating phosphorus from detergents sold for use within the basin of 

 the Great Lakes System. 



2. Effhient Requirements. The phosphorus concentrations in effluent 

 from municipal waste treatment plants discharging in excess of one 

 million gallons per day, and from smaller plants as required by regu- 

 latory agencies, shall not exceed a daily average of one milligram per 

 litre into Lake Erie, Lake Ontario and the International Section 

 of the St. Lawrence River. 



3. Industrial Discharges. Waste treatment or control requirements 

 for all industrial plants discharging wastes into the Great Lakes Sys- 

 tem shall be designed to achieve maximum practicable reduction of 

 phosphorus discharges to Lake Erie, Lake Ontario and the Interna- 

 tional Section of the St. Lawrence River. 



4. Reductions for Lower Lakes. These programs are designed to 

 attain reductions in gross inputs of phosphorus to Lake Erie and 

 Lake Ontario of the quantities indicated in the following tables for 

 the years indicated. 



TABLE 1.— ANNUAL PHOSPHORUS LOADINGS AND REDUCTIONS IN LOADINGS TO LAKE ERIE (INCLUDING LAKE 



ST. CLAIR AND THE ST. CLAIR AND DETROIT RIVERS) 



[Short tons per year] 



1971 1972 1973 1974 1975 1976 



United Slates: 



Baseload 25,800 26,400 27,000 27,600 28,300 28,800 



Reduction. 100 5,200 9,800 15,100 16,000 17,300 



Residual load 



Canada: 



Baseload 



Reduction 



Residual load 



Input from Lake Huron 



Totals: 



Baseload 



Reduction 



Residual load 31,200 26,700 22,300 17,000 16,800 16,100 



