Research Article
Natural Background Level and Contamination of Shallow Groundwater Salinity in Various Aquifers in a Coastal Urbanized Area, South China
Table 3
Groundwater salinity contamination in various cities in the Pearl River Delta.
| Contamination levels | Guangzhou | Shenzhen | Foshan | Dongguan | Huizhou | Zhaoqing | Jiangmen | Zhuhai | Zhongshan |
| Uncontaminated (%) | 79.3 | 86.7 | 75.8 | 65 | 84.4 | 96.2 | 80.9 | 92.3 | 52.7 | Low (%) | 16.5 | 13.3 | 21 | 20 | 12.5 | 3.8 | 15.9 | 7.7 | 36.8 | Moderate (%) | 2.1 | 0 | 3.2 | 12.5 | 3.1 | 0 | 3.2 | 0 | 10.5 | High (%) | 2.1 | 0 | 0 | 2.5 | 0 | 0 | 0 | 0 | 0 |
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