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What Air Quality Index (AQI) Means

Aug 18, 2025 • Weather Pulse Now
What Air Quality Index (AQI) Means

The Air Quality Index (AQI) is a measure of pollution levels in the air. As an instance, the AQI is 63 (Poor). This means sensitive groups such as children, the elderly, and people with respiratory issues may feel discomfort because of the high AQI level.

AQI is based on pollutants like PM2.5 and PM10 (tiny particles that enter lungs) circulating in the air. A PM2.5 reading of 15.4 µg/m³ and PM10 at 16.0 µg/m³ show elevated pollution levels that can cause severe irritation moving in the outdoors.

Checking AQI with Weather Pulse Now helps you decide if it’s a safe day going for exercise outside, travel, or staying indoors.

🌫️ Air Quality Index (AQI) Range Health Impact
Good 0 – 50 Air is clean and safe for all individuals
Moderate 51 – 100 Air quality acceptable; slight risk for very sensitive people
Unhealthy for Sensitive Groups 101 – 150 Children, elderly, and asthmatics should reduce outdoor activity
Unhealthy 151 – 200 Everyone may experience health effects; sensitive groups more seriously
Very Unhealthy 201 – 300 Health warnings for all; significant risk of illness
Hazardous 300+ Emergency conditions; everyone at risk, outdoor activity discouraged