GAC Solution For Ohio's Most Challenging WaterSource: Calgon Carbon Corporation
Over the course of many years the City of Celina, Ohio has been challenged with supplying drinking water to the 11,647 residents of the city and the East Jefferson District. The difficulty arises from the source water, Grand Lake, a 21 square mile water body that contains high amounts of total organic carbon (TOC) and supports a high concentration of Planktothrix algae. The high TOC and algal content of the lake water has caused severe taste and odor problems and fostered the formation of very high concentrations of disinfection by-products (DBPs).
Much of the watershed for Grand Lake is agricultural land. The lake itself averages only seven feet in depth. These conditions lead to massive algal blooms and TOC concentrations that average 12.5 mg/l and peak at over 20mg/l. There are also fluctuations in pH and turbidity that ranges from 10 to 300 Nephelometric Turbidity Units (NTU).