Air Quality Index (AQI) | AirNow.gov
Local air quality can affect our daily lives. Like the weather, it can change from day to day. EPA developed the Air Quality Index, or AQI, to make information available about the health effects of the five most common air pollutants, and how to avoid those effects.
Air Quality Index (AQI) Basics - AirNow
The U.S. Air Quality Index (AQI) is EPA's tool for communicating about outdoor air quality and health. The AQI includes six color-coded categories, each corresponding to a range of index values. The higher the AQI value, the greater the level of …
AirNow.gov
AirNow is your one-stop source for air quality data. Our recently redesigned site highlights air quality in your local area first, while still providing air quality information at state, national, and world views.
Using the Air Quality Index - AirNow
Use the Air Quality Index (AQI) to learn more about your local air quality and the best times for your outdoor activities. The U.S. Air Quality Index – daily index. What it is: The U.S. Air Quality Index, or AQI, is EPA’s tool for communicating daily air quality. It uses color-coded categories and provides statements for each category that ...
What Is the AQI? - AirNow.gov
AQI Numbers. An index with numbers can be a quick way to tell people how good or bad something is. For example, you might say your school lunch is a 1 (very good) or a 5 (yucky). The Air Quality Index uses numbers from 0 to 500. These numbers are used to decide the AQI color.
The AQI is an index for reporting daily air quality. It tells you how clean or unhealthy your air is, and what associ-ated health efects might be a concern. The AQI focuses on health efects you may experience within a few hours or days after breathing unhealthy air.
National Maps | AirNow.gov
The list below shows the areas with the highest NowCast AQI for the current hour. The AirNow system automatically generates this list every hour, based on the areas with the highest NowCast AQI for ozone or particle pollution.
AQI & Health | AirNow.gov
Local air quality can affect our daily lives. Like the weather, it can change from day to day. EPA developed the Air Quality Index, or AQI, to make information available about the health effects of the five most common air pollutants, and how to avoid those effects.
AQI Calculator | AirNow.gov
AQI to Concentration Calculator. DIRECTIONS: Select a pollutant, then enter the AQI value. Click on “Calculate” to see the results. AQI Calculator - convert AQI to Concentration. U.S. EPA Scale.
Air Quality Guide for Ozone. Ground-level ozone is one of our nation’s most common air pollutants. Use the chart below to help reduce your exposure and protect your health. Visit AirNow.gov for your local air quality forecast (www.airnow.gov). Air Quality Index.