Air Quality Index AQI
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| Rating | |||
|---|---|---|---|
| United States | 50%2 | 5.00 | |
| France | 25%1 | 5.00 | |
| Poland | 25%1 | 4.00 | |
| United Arab Emirates | <1%0 | — | |
| Afghanistan | <1%0 | — | |
| Antigua And Barbuda | <1%0 | — | |
| Anguilla | <1%0 | — | |
| Albania | <1%0 | — | |
| Armenia | <1%0 | — | |
| Angola | <1%0 | — |
Description
Breathe with confidence. Air Quality Index AQI gives you a live, color-coded read on the air around you — a single AQI number you can act on, the pollutant driving it, and straightforward advice on whether to open the windows, wear a mask, or keep the kids inside today.
The home screen centers on a gently breathing AQI orb that shifts color with the air quality, from green "good" to deep "hazardous," with a one-line summary and health advice underneath.
WHAT YOU GET
Live AQI with health advice — a big, clear index with its category and plain-language guidance on outdoor activity, switchable between US AQI and EU AQI.
Dominant pollutant — instantly see which pollutant is the worst offender right now and how many are above the WHO guideline.
Full pollutant breakdown — current PM2.5, PM10, ozone (O3), nitrogen dioxide (NO2), sulphur dioxide (SO2) and carbon monoxide (CO), each shown against the WHO 2021 guideline limit so you know what's elevated.
Sensitive-group warnings — tailored notes for children, older adults and people with asthma, heart or lung conditions.
Mask & ventilation advice — should you mask up outdoors, and is it a good time to air out the house or keep windows shut?
24-hour & 5-day trend — see whether the air is improving or worsening, with min/avg/max and a five-day outlook.
WHO IT'S FOR
People with asthma or other respiratory conditions, parents, runners and cyclists, anyone living near traffic or industry, those in wildfire-smoke regions, and anyone who simply wants to know if today's air is clean.
HOW IT WORKS
Air-quality data comes from the Open-Meteo air-quality model for your location. Enable location for live local readings, or browse sample data offline.
A NOTE ON ACCURACY
AQI and pollutant values are modeled forecasts and estimates, not a measurement at your exact spot, and vary with weather and local sources. Comparisons use WHO 2021 guideline levels for reference only. This is not medical advice.