New York, NY 16° Los Angeles, CA 25° Chicago, IL 20° Houston, TX 31° Miami, FL 30° Phoenix, AZ 25° Seattle, WA 20° Denver, CO 23° Toronto, ON 20° Vancouver, BC 12°

Air quality today

The current AQI picture across major US cities.

Good 0-50Moderate 51-100Sensitive 101-150Unhealthy 151-200Very Unhealthy 201-300
New York
30
Good
PM2.5: 7.2 µg/m³
Los Angeles
47
Good
PM2.5: 11.3 µg/m³
Chicago
50
Good
PM2.5: 12 µg/m³
Houston
68
Moderate
PM2.5: 14.8 µg/m³
Phoenix
33
Good
PM2.5: 7.9 µg/m³
Philadelphia
63
Moderate
PM2.5: 18 µg/m³
San Antonio
40
Good
PM2.5: 5.5 µg/m³
San Diego
45
Good
PM2.5: 10.7 µg/m³
Dallas
53
Moderate
PM2.5: 12.9 µg/m³
Miami
49
Good
PM2.5: 6.3 µg/m³
Atlanta
59
Moderate
PM2.5: 15.8 µg/m³
Boston
21
Good
PM2.5: 4 µg/m³
San Francisco
52
Moderate
PM2.5: 12.4 µg/m³
Seattle
30
Good
PM2.5: 7.1 µg/m³
Denver
26
Good
PM2.5: 5.9 µg/m³
Washington
30
Good
PM2.5: 7.1 µg/m³
Minneapolis
27
Good
PM2.5: 6.5 µg/m³
Las Vegas
34
Good
PM2.5: 4.7 µg/m³
Orlando
43
Good
PM2.5: 10.4 µg/m³
Charlotte
51
Moderate
PM2.5: 12.1 µg/m³
Toronto
35
Good
PM2.5: 8.4 µg/m³
Montréal
23
Good
PM2.5: 5.4 µg/m³
Vancouver
43
Good
PM2.5: 10.3 µg/m³
Ottawa
23
Good
PM2.5: 5.4 µg/m³
Understanding the AQI
US Air Quality Index (EPA)
The EPA's Air Quality Index turns pollutant concentrations — fine particles (PM2.5), coarse particles (PM10), ground-level ozone and nitrogen dioxide — into one 0-500 number. Green (0-50) means clean air; yellow (51-100) is acceptable; orange (101-150) starts to affect people with asthma or heart conditions; red and above (151+) is unhealthy for everyone. Wildfire smoke and summer ozone are the two biggest drivers of bad-air days in the US.
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 8:02 PM