AQI Value Guide
What Does AQI 400 Mean?
AQI (Air Quality Index) is a 0-500 scale used in India to summarize air quality. An AQI of 400 falls in the Very Poor category (301-400).
AQI 400 Summary
Category: Very Poor
Range: 301-400
AQI 400 indicates Very Poor air quality. Health effects are likely; everyone should reduce outdoor activity.
Health impact: Respiratory illness on prolonged exposure; effects may be more pronounced in people with lung and heart diseases.
Is AQI 400 Safe?
Health effects are likely; everyone should reduce outdoor activity.
Outdoor Guidance
Avoid outdoor exercise; keep outdoor time short.
Check Your Local AQI
See live readings and nearby monitoring stations for your location.
Open AQI Near MeWhat You Can Do Today
- Check your local AQI before outdoor exercise and adjust plans if it stays elevated.
- Avoid peak traffic hours when pollution tends to be higher.
- Keep windows closed if outdoor air looks hazy or smells smoky.
- A well-fitting mask is recommended if you must go out.
- If you feel irritation or breathing discomfort, move indoors and reduce activity.
FAQs About AQI 400
AQI 400 falls in the Very Poor category (301-400). Health effects are likely; everyone should reduce outdoor activity.
Health effects are likely; everyone should reduce outdoor activity. Sensitive groups should be more cautious when AQI is Very Poor.
Avoid outdoor exercise; keep outdoor time short. If you feel breathing discomfort, reduce activity.
A well-fitting mask is recommended if you must go out.
AQI 0-50 is considered Good in India, with minimal health impact for most people.