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Real-Time Air Quality
Get instant, accurate air quality data for any US address. Monitor pollutants, understand health impacts, and protect what matters most.
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Professional-grade air quality monitoring powered by leading environmental data sources
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EPA Standard
AQI calculated using official EPA standards from global atmospheric monitoring and satellite data.
Always Updated
Hourly refreshes ensure you see the latest air quality data for informed decisions.
Live Air Quality in Major Cities
Real-time AQI monitoring across America's largest metropolitan areas
Understanding the AQI Scale
The Air Quality Index (AQI) translates complex pollution data into an easy-to-understand scale from 0 to 500
Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous
Air Quality Resources
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Common questions about AQI, health effects, and protection strategies
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Complete guide to air quality across California regions and cities
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Browse blogAbout Air Quality Monitoring
Air quality directly impacts your health, especially if you have respiratory conditions, are pregnant, elderly, or have young children. AirQuality.directory provides instant access to real-time Air Quality Index (AQI) data for any location in the United States, helping you make informed decisions about outdoor activities, exercise, and daily routines.
Our platform aggregates data from OpenWeather's global atmospheric monitoring network, which combines satellite observations with sophisticated atmospheric models to provide accurate, up-to-date air quality information. We track all six EPA-monitored pollutants: PM2.5, PM10, ozone (O₃), nitrogen dioxide (NO₂), carbon monoxide (CO), and sulfur dioxide (SO₂).
Whether you're checking air quality before a morning jog, planning outdoor events, or monitoring conditions during wildfire season, AirQuality.directory gives you the information you need to breathe easier. Our service is completely free, requires no account, and updates hourly to ensure you always have the latest data.