Most Polluted Cities in Heard Island and McDonald Islands
Real-time air quality data from cities around the world Heard Island and McDonald Islands
Real-time air pollution rankings for 0 cities across Heard Island and McDonald Islands. See which cities have the highest pollution levels and worst air quality.
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Understanding Air Quality Index
Good
Air quality is satisfactory, and air pollution poses little or no risk.
Moderate
Air quality is acceptable. However, there may be a risk for some people.
Unhealthy for Sensitive Groups
Members of sensitive groups may experience health effects.
Unhealthy
Everyone may begin to experience health effects.
Very Unhealthy
Health alert: everyone may experience more serious health effects.
Hazardous
Health warnings of emergency conditions. The entire population is likely to be affected.
The Air Quality Index (AQI) is a scale from 0 to 500 that measures air pollution levels. Poor air quality can cause respiratory issues, cardiovascular problems, and other health concerns.
Source: US EPA Air Quality Index
Last updated: Oct 23, 2026 12:43 PM