Cautionary Statement Critical PollutantLevel of Health ConcernHealth Message OzoneGoodNone
Warning - Hot Weather Caution: During summer months a forecast of extreme heat could indicate that precautions should be taken to protect the safety of older citizens and others at risk due to the high temperature. Be aware that during forecasts of extreme heat the air quality may be good or unhealthy. Taking actions to protect yourself from high temperature is the priority and will also help protect you from elevated pollutant levels.
Additional Information
Welcome to Philadelphia's Real-Time Air Quality Information Web Site!
This web site provides current information about the air quality in Philadelphia and lets you know what you should do to protect your health if the air quality is unhealthy. A key tool to do this is the Air Quality Index (AQI). The AQI is a color coding system as seen in the chart below. Using formulas created by the EPA, data for pollutants are converted into a score ranging from 0 to 500. Values exceeding 100 trigger "Action Days" where you are advised to take precautions to protect yourself from health effects. The highest of the pollutant scores is reported as the overall air quality rating for Philadelphia for a given day.
Additional information may be obtained through the Air Management Services (AMS) Web Site. AMS is the local air pollution control agency for the City of Philadelphia and provides services to achieve healthy air quality through the prevention and control of air pollution and air pollution nuisances. To make a specific request, please send an email. Click Here