Drinking Water and Health - Physicians for Social Responsibility resources answers many questions commonly posed to health professionals about drinking water. More than one third of all waterways are reported to be unsuitable for fishing or swimming because of pollution.
Most contaminants are sewage and bacteria, fertilizer, toxic metals, oil and grease.
Water Treatment FAQ - By Patton Turner. Excellent overview of all water treatment methods and associated problems. Zero Waste America - Promotes the elimination of waste and pollution. Information on water treatment including chlorine and fluoride. Inside Walkerton - Walkerton, Ontario, Canada water tragedy due to E. coli in drinking water.