Track the air quality across the US

Millions of people across the Northeast, Midwest and mid-Atlantic in the US have been under air quality alerts in recent months as wildfire smoke originating from Canada wafts over major US cities. Use this tool to see how your air quality might be affected.

Air quality index

0–50
Good
51–100
Moderate
101–150
Unhealthy for sensitive groups
151–200
Unhealthy
201–300
Very unhealthy
301+
Hazardous