Abstract
The concentrations of cadmium, copper and lead, in the aquatic environment of the Kitakyushu district, Japan from 1976 to 1977 were investigated. This survey covered all rivers which run through the area, the bay, and the sea surrounding the district. The values obtained showed no significant heavy metal pollution, compared with values found in the literature for metal concentrations in other parts of the world, except for the concentrations of Dokai Bay. The concentrations of lead of the Dokai Bay showed an obviously high value, 40 μg 1 −1 (14–74 μg 1 −1, n = 32). This is due to the industrial activities of the surrounding area.
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