AWWA WQTC64193

This manuscript evaluates the historical results of total coliform monitoring and then explores the ability to detect statistically significant results based on the available data. Basic data collected from federal, state and utility sources are summarized. The data collected are used to explore the differences that would be detectable based on the number of samples collected. Theoretical and empirical data are evaluated for effects of increasing the sample volumes that are collected from the currently specified 100 mL samples up to 2 liter samples (based on actual samples and to 20 liters (based on statistical bootstrap modeling). Using existing data alternative indicators of microbial condition are also evaluated. Includes 15 references, tables, figures.