From the iTunes App Store:
The AIRNow iPhone application will provide an increasingly mobile public with real-time air quality information that people can use to protect their health when planning their daily activities
The app will allow users to get location-specific reports on current air quality and air quality forecasts for both ozone and fine particle pollution (PM2.5). Air quality maps from the AIRNow website provide visual depictions of current and forecast air quality nationwide, and a page on air quality-related health effects explains what actions people can take to protect their health at different AQI levels, such as “code orange.”
The AIRNow app is free.
Direct to App Store
See Also: AIRNow is Also Available on the Web
See Also: U.S. Air Quality Summary (text)
See Also: EnviroFlash (Air Quality Alerts)
Air quality affects how you live and breathe. Like the weather, it can change from day to day, or even hour to hour. Up-to-date information allows you to make decisions based on air quality forecasts. EnviroFlash comes to you through a partnership between the US EPA and your state or local air quality agency – notifying you about air quality so you don’t have to go searching for it!