Abstract
In 1942 a pollution survey was made of Humber Arm, Bay of Islands, and Exploits River, Notre Dame Bay, Newfoundland, where pulp and paper mills are situated.Fresh water from the Humber River affects the salinity of the water in Humber Arm mainly to a depth of about 10 metres. The salinities and sulphates increased from the surface to the bottom while the temperature and dissolved oxygen decreased. No sulphite was detected. It was concluded that the operations of the mill have no injurious effects on fish life in Humber Arm.On the Exploits River the dissolved oxygen was decreased by the mill effluents, and sulphite was detected in appreciable quantities, but neither of these effects was sufficient to harm fish life.
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