observed in the low solids treatment as mean water temperature increased between spike events 2 and 3, whereas in the high solids treatment the ammonia transformation rate continued to increase linearly with increased water temperature. More of the variation in ammonia transformation rate was explained by the linear relationship in the high solids treatment. It should be noted, however,that additional data points at higher temperatures, which was beyond the scope of the present study, are needed if the relation-ship between ammonia transformation rate and water temperature is to be described fully.