Contained are reports of five subcommittees of the National Technical Advisory Committee on Water Quality Criteria. Subcommittees were recreation and aesthetics; public water supplies; fish, other aquatic life, and wildlife; agricultural uses; and industrial water supplies. Each committee report contains discussion of the problem area, criteria…

This article describes the development, construction and operation of portable, large-volume sampling devices that facilitate the examination of water supplies for viruses and bacteria.

A photoelectric on-point detector for Winkler oxygen titrations is described. (MR)

Describes and illustrates the pond model of wastewater treatment adapted by a small Maine town. Includes wastewater collection, treatment, sludge disposal, and chlorination. (MA)

This article is part two in a series. It builds upon the first article and demonstrates, in a step-by-step fashion, the simplicity of using Caldwell-Lawrence diagrams to determine the amount of conditioning chemicals required to produce protective waters. (Author/MA)

An attempt to determine the reasons for substandard wastewater treatment plant performance is made. Recommendations include a change in existing operator training methods. (MR)

Ten case reports of agricultural uses of thermally conditioned wastewater treatment sludge are given to show a way of recycling wastes. (MR)

This 11-minute videotape and poster can be used for interactive instruction in grades 6-12 science classes. Issues examined in this videotape include preserving precious water resources, protecting the environment from pollutants caused by urban and agricultural development and industry within changing lifestyles, and ensuring the availability of…

This class project led to a solution for homeowners' pollution. (Editor)

To aid in personnel training and as a complement to its enforcement program, the Minnesota Pollution Control Agency implemented an operator assistance program in June 1976. Its principle objective was to train operators in process control to improve their skills and enhance their long-term ability to produce high quality effluent. (Author/JN)

A report on the increasing usage of chemicals in water treatment, particularly the use of coagulants and flocculants. (BB)

Describes how the University of Arkansas helped the cities of Little Rock and North Little Rock to resolve a difficult and longstanding conflict over water rates and the provision of drinking water. (EV)

This activity involves elementary students in simulating water purification techniques by finding ways to clear up soapy water. An introduction discusses water use and conservation. Materials needed and step-by-step procedure are provided. (LZ)

Presents the emerging dilemma presented by the restoration of the Connecticut River ecosystem after the passage of the Clean Air Act of 1972. Cites troubles stemming from conservation efforts that made the area more appealing to developers and for recreation usage. Discusses the need for a new approach to land-use regulations. (MCO)