Air Pollution in the World

What is AQI?

SRI AURIBINDO
MARG, DELHI, INDIA
CEDART, OAXACA,
MEXICO
JABAVU,JOHANNESBURG
METRO, SOUTH AFRICA
SEWAGE TREATMENT
JIYUAN, CHINA
QUEENS COLLEGE,
NEW YORK, USA
SAKARYA HENDEK OSB,
TURKEY

What is the Air Quality Index (AQI)?

This Air Quality Index (AQI) system is used by the US EPA to convert the raw pollutants readings, expressed in µg/m3 or ppb, into the AQI (scale from 0 to 500). The reason for this averaging is that the AQI scale specifies that each of the Levels of Health Concern (i.e. Good, Moderate,... Unhealthy...) is valid under 24 hours exposure. aqiguides
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