his on-line reference guide has been prepared with the intent of providing current and accurate educational information in a "user friendly" format to assist physicians with the diagnosis and management of waterborne disease and the health effects of water pollution. This Continuing Medical Education (CME) online course is available in English, and is intended for advanced level physicians. The course is organized into 10 chapters that represent the chapters of the Physician Online Reference Guide included in this CME online offering. These chapters represent a comprehensive core curriculum of clinically relevant information and specialized educational resources for practicing physicians in several major areas of increasing importance and growing concern among those responsible for protecting public health and water safety. The American College of Preventive Medicine (ACPM) designates this educational activity for a maximum of 22 hours in Category 1 credits toward the American Medical Association (AMA) Physician's Recognition Award. Each physician should claim only those hours of credit that he or she actually spent in this educational activity. CME credit can be earned for the entire course OR for individual chapters of Recognizing Waterborne Disease and the Health Effects of Water Pollution: A Physician Online Reference Guide.