Table 5: The assessment of heavy metals pollution in four study areas.
Area | Single-factor pollution index | Comprehensive | Pollution | |||||||
Cd | Cu | Ni | Pb | Cr | Mn | Co | Se | Index | Degree | |
Pingdi | 0.26 | 0.1 | 0.22 | 0.06 | 0.27 | 0.21 | 0.09 | 0.25 | 0.23 | Safety |
Puan | 0.53 | 0.17 | 0.29 | 0.08 | 0.27 | 0.39 | 0.17 | 0.31 | 0.42 | Safety |
Xingwen | 0.55 | 0.15 | 0.41 | 0.01 | 0.09 | 0.17 | 0.27 | 0.18 | 0.42 | Safety |
Gulin | 1.43 | 0.44 | 0.51 | 0.1 | 0.68 | 0.77 | 0.3 | 0.69 | 1.1 | Light pollution |