Know the Air You Breathe
Real-time air quality data for every US city and ZIP code. Make informed decisions about outdoor activities.
Example: Los Angeles, CA or 90001
Understanding the Air Quality Index (AQI)
0-50
Good
51-100
Moderate
101-150
Unhealthy for Sensitive
151-200
Unhealthy
201-300
Very Unhealthy
301+
Hazardous
Major US Cities
New York
New York
Pop: 8,336,817
Los Angeles
California
Pop: 3,979,576
Chicago
Illinois
Pop: 2,693,976
Houston
Texas
Pop: 2,320,268
Phoenix
Arizona
Pop: 1,680,992
Philadelphia
Pennsylvania
Pop: 1,584,064
San Antonio
Texas
Pop: 1,547,253
San Diego
California
Pop: 1,423,851
Dallas
Texas
Pop: 1,343,573
San Jose
California
Pop: 1,021,795
Why Choose Clean Air Data?
Real-time Data
Hourly updates directly from EPA monitoring stations across the US.
Nationwide Coverage
Air quality data for 1000+ cities and 40,000+ ZIP codes nationwide.
Historical Trends
View past AQI levels and track air quality patterns over time.