This book serves as a compilation of water treatment studies conducted over the past decade at the Bloomington, Illinois Water Treatment Plant. It presents the results of a series of 26 on-site studies to systematically evaluate and improve plan unit processes, unit operations, and emergency procedures. It provides a template for comparable long-term studies that can be used at other water utilities. Many of the results of this applied research program have yet to appear in the waterworks literature; possibly owing to the substantial costs and time required for obtaining full-scale plant operational data. In addition to evaluations of unit operations and processes, these studies detail efforts to combat seasonal taste-and-odor problems resulting from algal blooms in lake water supplies. At substantial cost, every potential method for taste-and-odor control, including UV-peroxide oxidation, has been tested.