Air Quality Index (AQI) – Notifications


It’s important to limit your exposure to smoke – especially if you may be susceptible. Pay attention to local air quality reports. Stay alert to any news coverage or health warnings related to smoke. Also find out if your community reports EPA’s Air Quality Index (AQI). Check the Air Quality Index (AQI) forecast for your area. The AQI, based on data from local air quality monitors, tells you about the daily air quality in your area and recommends precautions you can take to protect your health. As smoke gets worse, the concentration of particles in the air changes – and so do the steps you should take to protect yourself.[1]

The purpose of the AQI is to help you understand what local air quality means to your health. To make it easier to understand, the AQI is divided into six categories:[2]

Air Quality Index (AQI) Values Levels of Health Concern Colors
When the AQI is in this range: ..air quality conditions are: …as symbolized by this color:
0-50 Good Green
51-100 Moderate Yellow
101-150 Unhealthy for Sensitive Groups Orange
151 to 200 Unhealthy Red
201 to 300 Very Unhealthy Purple
301 to 500 Hazardous Maroon

Each category corresponds to a different level of health concern. The six levels of health concern and what they mean are:[3]

  • “Good” AQI is 0 – 50. Air quality is considered satisfactory, and air pollution poses little or no risk.
  • “Moderate” AQI is 51 – 100. Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people. For example, people who are unusually sensitive to ozone may experience respiratory symptoms.
  • “Unhealthy for Sensitive Groups” AQI is 101 – 150. Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air. .
  • “Unhealthy” AQI is 151 – 200. Everyone may begin to experience some adverse health effects, and members of the sensitive groups may experience more serious effects. .
  • “Very Unhealthy” AQI is 201 – 300. This would trigger a health alert signifying that everyone may experience more serious health effects.
  • “Hazardous” AQI greater than 300. This would trigger a health warnings of emergency conditions. The entire population is more likely to be affected.



  1. AirNow – Air Quality Index (AQI) – Smoke from Agricultural and Forest Fires:
  2. AirNow – Air Quality Index (AQI) – A Guide to Air Quality and Your Health:
  3. AirNow – Air Quality Index (AQI) – A Guide to Air Quality and Your Health: