| Characteristic | 2013 | 2017 |
|---|---|---|
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
| - | - | - |
The chart is not accessible to screen readers. Please switch to the table view to access the data.
Download
Source
Sources
Release date
September 2020
More information
Region
China
Survey time period
2013 and 2017
Supplementary notes
*2014 and 2017 data.
**2015 and 2017 data.
Polluted surface water refers to surface water with a Water Quality Index (WQI) of grade IV or worse.
The water quality index (WQI) or water quality standard (WQS) is a five-level grading system that measures the quality of a water body.
WQI levels:
I and II: Excellent
III: Good
IV: Lightly polluted
V: Moderately polluted
Worse than V: heavily polluted
The source does not provide a release date. The date given is the date of data access.
Citation formats
