World air quality (AQI) ranking

Your questions answered, on IQAir's 2018 World Air Quality Report

17 articles in this collection
Written by Chloe

Changelog: 2018 World Air Quality Report

Written by Chloe
Updated over a week ago

Air quality ranking disclaimer

Written by Chloe
Updated over a week ago

Why are the WHO Air Quality Guidelines used when different countries have different ambient air quality requirement?

Written by Chloe
Updated over a week ago

What are some of the major sources or causes of ambient air pollution?

Written by Chloe
Updated over a week ago

Since data measured by AirVisual monitors are used in the ranking, how accurate are AirVisual data?

Written by Chloe
Updated over a week ago

Why is the US Air Quality Index used in the ranking?

Written by Chloe
Updated over a week ago

How precise is the ranking?

Written by Chloe
Updated over a week ago

How is historical data being incorporated in the ranking dataset?

Written by Chloe
Updated over a week ago

Is missing data from stations common? How is the missing data treated in this ranking and which countries have bad data quality?

Written by Chloe
Updated over a week ago

What is the data availability rule in the ranking?

Written by Chloe
Updated over a week ago

How is the ranking air quality data collected, processed and calculated?

Written by Chloe
Updated over a week ago

What are the steps taken to ensure the quality of data of the ranking?

Written by Chloe
Updated over a week ago

What are the data sources for this air quality ranking?

Written by Chloe
Updated over a week ago

How are the yearly PM2.5 yearly measurements for country/region calculated?

Written by Chloe
Updated over a week ago

Why is PM2.5 chosen for this ranking?

Written by Chloe
Updated over a week ago

Why is the air quality ranking data different from governmental/official data?

Written by Chloe
Updated over a week ago

Why are some cities and countries not listed in this air quality ranking?

Written by Chloe
Updated over a week ago