The U.S. Air Quality Index (AQI) is a tool used to measure and communicate air quality levels in a specific area. It provides a numerical value that represents the concentration of pollutants such as ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. The AQI is divided into color-coded categories ranging from “Good” (green) to “Hazardous” (maroon), helping the public understand potential health risks associated with outdoor air quality. Higher AQI values indicate greater pollution levels and an increased likelihood of health effects, especially for sensitive groups like children, the elderly, and individuals with respiratory conditions.
To learn more about the AQI, visit airnow.gov .
How can I stay informed on current ozone pollution levels?
The state health department’s Air Pollution Control Division issues daily ozone pollution forecasts. The division forecasts several air pollutants year-round and offers other email alerts as well. During summer, the division emphasizes Ozone Action Days. If forecasts show that day or the next may exceed National Ambient Air Quality Standards, the email will say an “Ozone Action Day Alert” is in effect. If forecasts do not show elevated ozone pollution levels, the email will say there is no alert in effect. The division sends these daily emails so Coloradans have the necessary information to plan ahead and make informed decisions. Use these resources to keep the AQI handy, and stay informed on Air Quality Action Days:
- Visit Colorado Department of Public Health & Environment’s (CDPHE) air quality page to sign up for Air Quality Alerts for your area, and check current air quality advisories and pollution levels.
- Get the free AirNow app
- You can also explore an interactive map to see air quality sensors and the current AQI in your region and across the country at AirNow.gov and across the state at the CDPHE Air Quality Monitoring page.
For alternative methods to receive air quality alerts, you can:
- Follow the Colorado Air Pollution Control Division on Facebook and Twitter.
- Call the advisory hotline at 303-758-4848.
- Subscribe through another accredited organization. For example, the division shares ozone pollution forecasts with the National Weather Service.
- Sign up for EnviroFlash emails