🏭 Air Quality Index Checker

Check the Air Quality Index (AQI) for any city with pollutant breakdown, health recommendations, and 24-hour trends.

What is Air Quality Index Checker?

Monitor air quality in real-time with our AQI Checker. See the overall Air Quality Index on an animated gauge with EPA color coding, individual pollutant levels (PM2.5, PM10, NO₂, Ozone), 24-hour trend charts, health recommendations for each AQI level, activity guidance, and sensitive group advisories. Uses the Open-Meteo Air Quality API.

How to Use

  1. Search for your city
  2. See the overall AQI on the animated gauge
  3. Check individual pollutant levels (PM2.5, PM10, NO₂, Ozone)
  4. View the 24-hour trend chart
  5. Read health and activity recommendations

Frequently Asked Questions

What is AQI?

The Air Quality Index (AQI) is a scale from 0-500 that measures how polluted the air is. 0-50 is Good, 51-100 is Moderate, and above 100 is increasingly unhealthy.

What pollutants are tracked?

PM2.5 (fine particles), PM10 (coarse particles), NO₂ (nitrogen dioxide), and O₃ (ozone).

Should I wear a mask?

At AQI above 150 (Unhealthy), consider wearing an N95 mask outdoors, especially during exercise.

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