The electric power industry is one of the major stationary-source contributors to air pollution. A basis is provided for assessing the relative significance of this class of sources and for establishing a research and development plan to develop control means. The pollutant sources are identified according to equipment type and size, regional distribution, fuel, user, age and other factors of significance to air pollution emissions. Estimates of installed capacity were made for the base year - 1967, with projections for 1975, 1980, 1985, 1990. Only intermediate-size conventional boilers were included. Boilers were broken down according to type and size. Annual emissions of SO2, NO(x) and particulates were computed by applying a series of operating factors (boiler efficiency, load factor, etc.) to the capacity inventory using a computer program (STRAT). The identification and the analysis of the cost-effectiveness of possible control approaches was also made. The major strategies examined included: fuel switching; flue gas treatment; and combution modification. Process designs and costs data were developed. The STRAT program was used to assess the relative cost and effect on pollutant reduction of a variety of different strategies. (Author)