|
CF
|
< 1
|
Low contamination
|
|
1 ≤ CF < 3
|
Moderate contamination
|
|
3 ≤ CF < 6
|
Considerable degree of contamination
|
|
CF ≥ 6
|
Very high contamination
|
|
PLI
|
< 1
|
No Pollution
|
|
> 1
|
Polluted
|
|
Er
|
< 40
|
Low potential ecological risk
|
|
40 ≤ Er < 80
|
Moderate potential ecological risk
|
|
80 ≤ Er < 160
|
Considerable potential ecological risk
|
|
160 ≤ Er < 320
|
High potential ecological risk
|
|
Er ≥ 320
|
Very high ecological risk
|
|
RI
|
< 150
|
Low ecological risk
|
|
150 ≤ RI < 300
|
Moderate ecological risk
|
|
300 ≤ RI < 600
|
Considerable ecological risk
|
|
RI > 600
|
Very high ecological risk
|
|
MI
|
< 0.3
|
Very Pure
|
|
0.3 ≤ MI < 1
|
Pure
|
|
1 ≤ Er < 2
|
Slightly Affected
|
|
2 ≤ Er < 4
|
Moderately Affected
|
|
4 ≤ Er < 6
|
Strongly Affected
|
|
> 6
|
Seriously Affected
|
