As part of the Environmental Monitoring for Public Access and Community Tracking (EMPACT) initiative, the Environmental Protection Agency (EPA) has created this site to keep the public informed about air pollution and its effect on health. Recently, the EPA added a map of the full domain of their pilot-scale program, 21 Eastern and Midwestern states, so that visitors can view ozone levels from Missouri to Maine. The site provides daily, regional ozone maps, health facts, real-time data by state, and ozone forecasts. Past ozone maps are available in Map Archives. Citizens who are interested in reducing air pollution will benefit from the EPA's tips.