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How to check air quality before going outside
Air quality changes through the day with traffic, weather and smoke, and on bad days it is worth a minute to check before a run, a long walk or opening the windows. An app with a local index and forecast makes that check a habit rather than a guess.
A daily routine, then air quality apps. This is general guidance, not medical advice; if you have asthma, heart or lung conditions, follow your doctor’s and local authorities’ advice.
Read the local index
Air quality apps turn sensor data into a simple colour-coded index. Check a station near you rather than a city average, since busy roads and parks can differ.
Use the forecast
Pollution often rises with traffic and still weather and can spike with wildfire smoke. A forecast lets you move a run or walk to a cleaner hour.
Adjust on bad days
On poor days, choose lighter activity, routes away from traffic, or exercise indoors. People with asthma, heart or lung conditions, older adults and children may need extra care. For outdoor routes, compare walking apps.
Mind the air indoors
Air out your home when outdoor air is cleaner, and keep windows shut during smoke or spikes. Compare apps in air quality apps.
| Step | What you do | Why |
|---|---|---|
| 1. Check the index | local air quality index | today at a glance |
| 2. See the forecast | hours ahead | plan around bad spells |
| 3. Know the pollutant | particles, ozone, smoke | different advice |
| 4. Time activities | exercise when air is cleaner | less exposure |
| 5. Ventilate smartly | open windows on cleaner hours | better indoor air |
Frequently asked questions
How do I check air quality near me?
Use an air quality app or official local service, and look at the station closest to you along with the forecast.
Should I exercise outside when air quality is poor?
Consider lighter activity, cleaner hours or exercising indoors, especially if you have a heart or lung condition.
When should I open the windows?
When outdoor air is cleaner than usual, and not during smoke or pollution spikes.