The report gives results of an effort to determine if a potential alternative to treatment prior to discharge of coke plant wastewater will result in a significant increase in emissions to the atmosphere. The alternative is using the wastewater, untreated, to quench blast furnace slag. To develop a preliminary determination, six emission measurements were made on a laboratory-scale facility simulating typical slag quenching practice. Test parameters encompassed two slag temperatures (594 and 816 C) and two waters, ASTM Type 1 water and coke plant effluent diluted to 2500 mg/liter TDS. The results indicate that particulate emissions increase with slag temperature and TDS in the water. Minor quantities of organic compounds were emitted, but showed no correlation with test variables. The data also showed no correlation between emissions of sulfur dioxide or fluoride and test variables.