Water is pulled from the South Umpqua river at a rate of 1200 to 3600 gallons per minute (GPM), depending on the demand. Based on the water’s PH, turbidity, and temperature, a coagulant called Aluminum Chloride Hydroxide (ACH) is then added. The ACH helps with floc formation in the settling basin. Flocculation is a treatment process where solids form large clusters, or flocs, to be removed from…