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Air Quality Index (AQI)

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US AQI

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Primary Pollutant --

Pollutant Breakdown

PM2.5 (Fine Particles) -- µg/m³
PM10 (Coarse Particles) -- µg/m³
O3 (Ozone) -- µg/m³
NO2 (Nitrogen Dioxide) -- µg/m³
SO2 (Sulfur Dioxide) -- µg/m³
CO (Carbon Monoxide) -- µg/m³

AQI Scale Reference

0-50
Good
51-100
Moderate
101-150
Sensitive
151-200
Unhealthy
201-300
Very Unhealthy
300+
Hazardous