WATER POLUTION CONTROL 



The study of water pollution and its relationship to fish and wildlife 

 has continued to be a function of the Department in cooperation with the 

 Department of Health and other agencies concerned with water uses. 



The need for pollution control has increased with the continuing popu- 

 lation growth, since new pollution problems continue to arise as industrial 

 and urban expansion goes on, while at the same time the pressure on fish 

 and wildlife resources increases. This need is revealed, too, in other uses 

 of water, and has led to active coordination of both administrative and 

 field efforts through the successful functioning of the Pollution Control 

 Board and the resultant inter-departmental liaison. 



It has been possible during the past year to concentrate on problems 

 which are primarily the responsibility of the Department, while other 

 problems with Public Health and other implications, are studied by the 

 Sanitary Engineering Division of the Department cSf Health. The objectives 

 for pollution control serve all interests regardless of which agency under- 

 takes to carry out the necessary study. 



While the sources of pollution vary as widely as do manufacturing 

 processes, much of the effort this year was confined to a few industries. 

 The study of the disposal of pulp and paper and mining wastes was the most 

 important undertaking in Northern Ontario, while canning, metal-working and 

 gravel washing were studied at length in Southern Ontario- Cannery wastes 

 continue to present the most widely distributed and difficult problems, 

 although gravel washing operations continue to expand and cause concern. 



Forty-one investigations were made through the year, varying from 

 detailed studies to routine examinations and consultations. Many studies 

 were necessarily continuous, since waste treatment and control can only be 

 feasibly undertaken as an integral part of the manufacturing process. 



The active participation and the advice of field personnel of the 

 Forestry Districts throughout the Province formed the basis, in most cases, 

 for commencing and carrying out the field studies. As in previous years, 

 the attitude toward those industries which create pollution problems was to 



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