A series of reports is presented on the following subjects: NERC--Cincinnati electron microscope facility; poliovirus and bacterial indicators of fecal pollution in landfill leachates; examination of drinking water supplies for viruses; a copper-cadmium column for manually determining nitrate; pollution from urban land runoff; striving for zero discharge of industrial wastes; sewer transport of household refuse; a replacement for the refuse truck; the bacterial quality of bottled water; modern ways of strip mining in mountainous areas; nature and use of coal ash from utilities; a radiotelemetry system for monitoring respiration in dogs; improving the fuel value of sewage sludge; and do regulated freight rates discourage recycling.