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Conclusions - State of Water Quality

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· No environmentally significant trends were found.
· The site-specific fecal coliform objective to protect drinking water receiving only disinfection appeared to have been exceeded at times. Partial treatment and disinfection of drinking water are needed due to frequent high fecal coliform, E. coli and turbidity levels.
· Occasionally, levels of aluminum, copper, iron and zinc exceeding guidelines for aquatic life or drinking water have been observed in winter and fall, in association with low levels of non-filterable residue. Levels appeared to be naturally high in the river, since higher values during low flows have occasionally occurred since monitoring began in 1987, and since there were no significant industrial discharges into the river.
· Variables exceeding guidelines at times during spring freshet were aluminum, chromium, copper, iron, manganese and titanium. High levels occurred in conjunction with high levels of non-filterable residue and turbidity, suggesting that the metals were in particulate form, not biologically available, and would be removed by drinking water treatment needed to remove turbidity.
· Guidelines were consistently met for most of the sampled variables, including: barium, beryllium, boron, dissolved chloride, magnesium, nickel, molybdenum, ammonia, nitrate/nitrite, pH, specific conductivity, dissolved sulphate, and vanadium.
· The water was well buffered against acid inputs.

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