Measuring Air Quality

Air quality affects everyone on Earth, so it’s vital to understand the importance of maintaining the quality of our air. The AQI is an index for reporting daily air quality, telling you how clean or polluted your air is and the health effects that may be a concern for you. EPA calculates the AQI for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particle pollution, carbon monoxide, sulfur dioxide and nitrogen dioxide. Ground-level ozone and airborne particles are the two pollutants that pose the greatest threat to human health in this country.
Think of the AQI as a yardstick that runs from 0 to 500. The higher the AQI value, the greater the level of air pollution and the greater the health concern. For example, an AQI value of 50 represents good air quality with little potential to affect public health, while an AQI value over 300 represents hazardous air quality.
The EPA has assigned a specific color to each AQI category to make it easier for people to understand quickly whether air pollution is reaching unhealthy levels in their communities. Have you checked your region’s AQI lately?
Source: Air Now