In 2005, the City of Cookeville, Tennessee, hired CTI Engineers, Inc. (CTI) to develop a long-term master plan for expansion of the City’s existing 15-MGD water treatment plant. The resultant study examined both conventional and membrane filtration alternatives. A water consumption demand of 22.5 MGD was determined as the needed capacity for the year 2025, and cost estimates were prepared for facilities sized to meet that demand.