Sodium enters drinking water by a variety of human activities and by natural means. Evidence suggests elevated levels of sodium in drinking water may adversely affect health. Action should be taken to reduce the level of human exposure to sodium in drinking water. (RE)

The ability of various treatment processes, such as oxidation ponds, chemical coagulation and filtration, and the soil mantle, to remove the agents of infectious disease found in waste water is discussed. The literature concerning the efficiency of removal of these organisms by various treatment processes is reviewed. (BT)

The use of chlorine dioxide as a disinfectant in water is being considered by the EPA. This article presents a summary of the known published reports concerning health effects of chlorine dioxide on animal and human populations. (Author/MA)

Discusses the contamination of drinking water supplies from highway salt applications. The toxicological and epidemiological literature indicates, at present, only that sodium in the diet is a factor in hypertension and general human ill-health. (MR)

In this study of a hepatitis outbreak combined data revealed the source of contamination, septic tank leakage into a stream. Children playing in the polluted ravine were most affected. (MR)

This Nome flood report indicates that immediate response by local and state sanitarians prevented major epidemics and provided solutions to waste disposal and health maintenance problems. In the end, most of the clean-up work was done by experienced sanitarians working with the cooperation of people in their own area. (MA)

Describes the Environmental Control policies and legislation in Chicago, Illinois concerning air, water, noise, solid waste management, urban life, and food protection. This article is the first of a series dealing with urban environmental health situations. (MA)