Seventy percent of the energy produced in a nuclear power reactor is rejected to the environment as low quality waste heat. One possible use of this heat source is for domestic wastewater treatment. This study examines a ferric-chloride, powdered activated carbon physical-chemical system in a one-step process as a function of temperature (20-80C) with COD, suspended solids, turbidity, and phosphorus removals used to monitor performance. Significant improvement in removal is obtained at higher temperatures with optimum results between 50C and 60C. Since urban wastewater flow and electric power usage are population-dependent and the system optimum treatment temperature coincides with waste heat characteristics, a combined power plant-wastewater system would generate recycleable water. (Author) Portions of this document are not fully legible.