This June 2003 NRDC study of drinking water quality in 19 U.S. cities finds that pollution and deteriorating, out-of-date plumbing are sometimes delivering drinking water that might pose health risks to some residents -- and unless steps are taken now, tap water will get worse. The report issues grades to each municipal water system studied in three problem areas -- water quality and compliance, source water protection, and right-to-know compliance -- and outlines a plan for protecting the nation's drinking water supply.