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AirVisual Knowledge Base

IQAir News

Featured Article

Are fireworks bad for air quality?

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How do stunning fireworks displays affect your air quality? Learn more.

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smog coming out of factory exhaust pipes

How does the Live Major Cities Ranking work?

The Major Cities Ranking is meant to provide a worldwide context about air quality. Learn more. Read More >

IQAir Air Quality Map

How wind and weather affect air pollution

Wind and weather can play a crucial role in influencing a region’s air quality. Learn more. Read More >

Hazy skies over city landscape

PM2.5

Particulate Matter (PM) are particles measuring 2.5 microns or less. Learn more. Read More >

Man in city coughing with face mask

What pollutants should I watch out for?

A list of the different air pollutants and their sources. Read More >

Co2 sensor in home

Indoor carbon dioxide

Learn about indoor CO2, including when indoor CO2 is too high and how to monitor it. Read More >

vehicle emissions

PM1 particulate matter

Learn more about PM1 – dangerous airborne particles less than 1 micron in size. Read More >

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Air quality reports explained

Different methods for calculating and reporting air quality data are used by public and private entities. Read More >

Factory exhaust

The real cost of air pollution

See how IQAir air quality data can quantify how much air pollution costs our health and our economies. Read More >

3D render of an ultrafine particle

Ultrafine particles

Learn more about ultrafine particles (UFPs), which can be as small as 0.003 microns. Read More >

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What is the air quality index (AQI)?

Learn what the air quality index (AQI) is and how it describes the safety of our air. Read More >

World Heat Map_1

Steps to ensure the quality of data

Any values determined to be erroneous through this data analysis process were discounted. Learn more. Read More >

World Heat Map_1

My serial number does not exist

Double-check your serial number from inside the settings menu. Learn more. Read More >

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