Air pollution comes from many different sources: stationary sources such as factories, power plants, and smelters and smaller stationary sources such as dry cleaners and degreasing operations; mobile sources such as cars, buses, planes, trucks, and trains; and naturally occurring sources such as windblown dust and volcanic eruptions. All these sources can affect air quality and human health. The EPA has identified six principal pollutants (or criteria pollutants - as they are also known). These pollutants are monitored by the EPA, as well as other national, state, and local organizations.
Know Your Ozone Forecast
Every day the Air Quality Index (AQI) tells you how clean or polluted your outdoor air is, along with associated health effects that may be of concern. The AQI translates air quality data into numbers and colors that help people understand when to take action to protect their health and the environment. Check your forecast at www.AirNow.gov.
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. You can subscribe to updates on air quality in your area via the EnviroFlash website. An online subscription page allows you to sign up, edit your profile, or cancel the service. After you choose the type and frequency of service you want, EnviroFlash will be sent to your email or cell phone as specified.