This report documents water treatment plant information as well as results of sampling & analysis at two coagulation/filtration plants & one lime softening plant. The objective of sampling & analysis was to evaluate the effectiveness of the water treatment plants to consistently remove arsenic (As) from source water. Additionally, data were collected in this study to evaluate the characteristics of the residuals produced by the treatment processes. The study was divided into 3 phases: source water sampling, preliminary sampling, & long-term evaluation. Includes 3 appendices, 20 figures, & 26 tables.Abraham Chen is the author of 'Arsenic Removal from Drinking Water by Coagulation/Filtration and Lime Softening Plants' with ISBN 9780756726560 and ISBN 0756726565.