| No | Low | Moderate | High |
---|---|---|---|---|
Concentration | Ci ≤ 0.1Cs | 0.1Cs < Ci ≤ 0.5Cs | 0.5Cs < Ci ≤ Cs | Ci > Cs |
Accumulation index | AI ≤ 0 | 0 < AI ≤ 25% | 25% < AI ≤ 50% | AI > 50% |
Purification index | 3 | 2B | 2A | 1 |
Hazard index | HI ≤ 0.01 | 0.01 < HI ≤ 0.1 | 0.1 < HI ≤ 1 | HI > 1 |
Carcinogenic risk | CR ≤ 10−6 | 10−6 < CR ≤ 10−5 | 10−5 < CR ≤ 10−4 | CR > 10−4 |