This CD-ROM product contains data on emissions from fossil fuel-fired electric power plants, which was collected by the EPA Acid Rain Program under 40 CFR 75. Pollutants monitored include sulfur dioxide, nitrogen oxides, and carbon dioxide. The pollutants are generally monitored usingcontinuous emissions monitoring systems (CEMS) on an hourly basis. Also included is general operating data, including operating time, heat input, and gross unit load. There is also information on the unit's monitoring plan, and the results of tests required to be performed by the source to insure that its monitoring equipment is functioning properly. Electric utilities, energy consultants, and power marketing companies can use EPA Acid Rain Program emissions data to project futureSO2 allowance costs and availability. Academic institutions can perform data modeling to evaluate environmental benefits and estimate health effects of SO2 reductions. EPA and other agencies use it to try to correlate the reduction of SO2 emissions with a decrease in acid precitation, and also to measure the impacts of other existing and proposed emissions trading programs (e.g., for NOx and CO2). Starting in2nd qtr 2008 and 4th qtr 2008 files will have EDR data and XML data. In 2009 all data should be XML. To see schema please go to http://www.epa.gov/ airmarkets/business/ ecmps/technical-info.