Index | Value | Category |
---|---|---|
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 |