AQI Health Advisor
Enter the Air Quality Index (AQI) for your city and get clear, simple guidance on whether it is safe to go outside, exercise, or send children out to play.
0 to 500. Check your weather app or a local AQI website.
Who is this advice for?
AQI scale
050100150200300500
How to use
- Find the current AQI number for your city (weather app, news, or an AQI website).
- Type the number into the AQI box.
- Tick any sensitive groups the advice is for, if it applies.
- Read the guidance and follow the protection tips below it.
Note
This tool uses the widely used US EPA AQI scale. AQI changes through the day — early morning smog can be worse than the afternoon reading. If you feel chest tightness, unusual coughing or breathlessness, move indoors and get medical help if it continues. This advice does not replace your doctor.