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Conclusions - State of Water Quality

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· Not enough data were available to comment on trends in water quality, although a slight downward trend in pH was apparent.
· High metals and non-filterable residue occurred together. This suggests that metals were in a particulate form, probably not biologically available, and would be removed by the turbidity removal needed before drinking.
· Total aluminum, cadmium, chromium, copper, iron, lead, manganese and zinc, apparent colour, non-filterable residue and turbidity values did not meet various water quality criteria at times due to high levels of suspended sediment in the water during freshet.
· Copper levels exceeded the aquatic life criteria at all times, suggesting a naturally high copper mineralization in the watershed.
· The river had a low sensitivity to acid inputs.
· Hardness levels were generally below the optimum range for drinking water in the summer and within the optimum range in the winter.
· Treatment to remove turbidity (plus disinfection) would be necessary before the water was used for drinking.
· The water was cool enough to be aesthetically pleasing for drinking, but too cold for water-contact recreation such as swimming.

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