Table 3:
The grading standards of soil pollution.
Degree
P
Pollution Degree
Ⅰ
< 0.7
Security level
Ⅱ
0.7-1
Alert level
Ⅲ
2-Jan
Light pollution
Ⅳ
3-Feb
Moderate pollution
Ⅴ
> 3
Severe pollution