City of Vernon released wastewater with phosphorus removal for a two-month period in the springs of 1984 and 1985. The total quantity of phosphorus released was low in comparison with the quantity of phosphorus discharged before land disposal and low compared with the quantity of phosphorus discharged annually from existing septic tanks. The wastewater altered several characteristics of Vernon Creek; there were increases in nitrogen, phosphorus, specific conductance and chloride. Despite high concentrations of ammonia nitrogen, there was no evidence of acute or chronic toxicity from the wastewater. The discharge did not increase coliform numbers in Vernon Creek, but coliform numbers in Vernon Arm increased following the discharge in 1985 but not in 1984. There are several characteristics of Vernon Creek that do not meet B.C. quality criteria, but only ammonia nitrogen in Vernon Creek failed because of the wastewater releases. The discharge increased the nitrogen concentration in Vernon Arm. The discharge may
Head, Bryan J.E.. 1987. City of Vernon Wastewater Releases Effects on Vernon Creek and Vernon Arm, Okanagan Lake. BC Ministry of Environment and Parks
Keywords: Wastewater Releases Effects, Vernon Creek, Vernon Arm, Okanagan Lake
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