logo of Chong Li

China Air Quality Visualization

Team: Chong Li, Tianyi Liu, Yu Liu, Kehan Liao, Shuyao Zhu

Air pollution is a leading cause of death across the globe, and contributes to stroke, heart disease, lung cancer, and other respiratory illness. This is an explorative project to learn and visualize the air quality of different cities in China by using dataset during the year of 2004 to 2014. The goal of this project is to find out patterns of air quality change overtime, and to see if there’s any correlation between pollution level and other factors related to city population and man-made factors.

How was the air quality in the ten-year span?

Select a Year




Select Regions

By checking the toolbox on the side, we can compare AQI (air quality index) of different geographic areas in China. We can see an ascending value of AQI (air quality index) over the years, which indicates air quality in those geographic areas was getting worse. In year of 2014, there was a significant increase of AQI value in North China area (blue lines), and a pattern of higher AQI (worse air quality) during winter time comparing to a lower AQI (better air quality) during summer time.

How was the air quality geographically?

To have a closer look of city AQI data, we plot 2014 AQI dataset onto China map. The map shows lower AQI (better air quality) in Southern China and a significant concentration of high AQI cities in Northern China.

Are you curious about the causes behind?

We can use slider bar below the map to select AQI in range from 125 to 200, selected cities have higher AQIs and worse air pollutions. Choose cities from map to compare relevancy between city economic development indicators and air pollutions, we found out that city with higher AQIs have larger population, larger green area coverage, and a more developed secondary industry.

How was the air quality related to city economic development indicators?

X Axis




Y Axis

With our assumptions from radar chart above, we use bubble chart below to validate. As a result, there’s a positive correlation between city AQI and city population, city AQI and city secondary industry.