How to Check the Air Quality Index Online

Find the current Air Quality Index for your area using the official AirNow government website.

Steps

1
Go to AirNow.gov on your browser.
This is the official EPA website for tracking air quality across the United States.
2
Type your city or ZIP code in the search box.
Enter your location and the site shows the current air quality reading for your area.
3
Read the AQI number and color on the display.
Green means good air quality. Red or purple means the air is unhealthy to breathe.
4
Check the main pollutant driving the AQI.
The site tells you whether ozone or particle pollution is the main concern for the day.
5
Look at the forecast tab for future air quality.
See the predicted AQI for the next few days so you can plan outdoor activities.

What is a dangerous AQI level?Show

An AQI over 150 is unhealthy for everyone. People with breathing problems should limit outdoor time when the AQI goes above 100.

Can I check air quality on my phone?Show

Yes, AirNow has a mobile app you can download. Many weather apps and smart speaker devices also show local AQI readings.

Does AirNow cover all countries?Show

AirNow covers the United States, Canada, and Mexico. For other countries, you can check the World Air Quality Index project website.

Written by the HowToDoStuff.online editorial team. Last updated May 18, 2026.