Air Quality Lookup
Check current and historical air quality for any U.S. location
10 Years of Data
Daily and annual AQI records from 2015-2024, sourced from the EPA Air Quality System.
Current Conditions
Real-time AQI from AirNow, updated hourly for monitoring stations across the country.
Trend Analysis
See whether air quality in your area is improving, stable, or getting worse over time.
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About This Data
All air quality data comes from the EPA Air Quality System (AQS), the official repository for ambient air quality data in the United States. The Air Quality Index (AQI) measures how clean or polluted the air is and what associated health effects might be a concern. Current conditions are sourced from AirNow.
AQI Scale
0-50: Good
51-100: Moderate
101-150: Unhealthy for Sensitive Groups
151-200: Unhealthy
201-300: Very Unhealthy
301+: Hazardous