| INDEX | Range | Classification | (%) | Source |
| CR | <10−6 | cause no significant health effects | 82.5 | [36] |
| >10−6 - 10−4< | Generally satisfactory | 17.5 | ||
| >10−4 | Intolerable | NA | ||
| HQ | <1 | Acceptable level (no concern) | 100 | [24] |
| >1 | No carcinogenic adverse effects | NA | ||
| HI | <1 | Safe | 100 | [24] |
| >1 | Unsafe | NA |