Air Quality Index (AQI)
The Air Quality Index (AQI) tells you how clean or polluted your outdoor air is and the associated health effects that may be of concern.
www.airnow.govI don’t have live access to current air quality data right now, but I can point you to reliable sources for the latest AQI updates and how to interpret them.
Key sources for latest air quality index
- AirNow: Official U.S. Air Quality Index (AQI) data, current conditions, and forecasts. Great for quick daily checks and city-by-city details. [citation: AirNow, 2026]
- WAQI (World Air Quality Index): Real-time map and city-specific AQI values with health guidance. Useful for comparing multiple locations. [citation: WAQI, 2026]
- National Weather Service: Provides AQI information and health guidance in the context of weather and forecasts in the U.S. [citation: NWS, 2026]
- Local and national environmental agencies: Many countries’ environmental agencies publish real-time AQI or air quality reports; check your country’s official environmental portal for the latest data.
How to read AQI categories (brief)
- 0-50 Good: Air quality is satisfactory; low health risk for the general population.
- 51-100 Moderate: Acceptable; some people, especially sensitive individuals, may experience minor effects.
- 101-150 Unhealthy for Sensitive Groups: Affects people with respiratory or heart conditions, older adults, and children more than the general public.
- 151-200 Unhealthy: Everyone may begin to experience health effects; sensitive groups may experience more serious effects.
- 201-300 Very Unhealthy: Health warnings of emergency conditions; outdoor activities should be limited.
- 300+ Hazardous: Serious health effects possible; avoid outdoor exertion.
If you tell me your city or region (e.g., Marseille or a nearby area), I can give you a concise interpretation likely to apply there and help you plan outdoor activities today.